1991 Bird
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Manhattan Beach, CA
Last edited by SixSeriesCSi; Jul 10, 2023 at 06:30 PM. Reason: Location
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
New Exhaust! Excited to replace the 2.5” TOTALFLOW from Amazon (Post #61). Initially, I removed the Exhaust Turndown for polishing and that was a terrible idea as the exhaust torched the Rear Bumper Support, Rear Bumper and the Wiring Harness for the Rear Lights.
So, all that needs to be addressed more thoroughly as I’m experiencing some type of electrical glitch as a result. I also lost the Exhaust Turndown ($34.99) Exhaust Tailpipe ($60.43) & Exhaust Hanger ($37.91) at work by carelessly leaving it behind.
I’ve always wanted a valve style muffler and these are discontinued.
Muffler $54.75
DYNOMAX 17959
So, all that needs to be addressed more thoroughly as I’m experiencing some type of electrical glitch as a result. I also lost the Exhaust Turndown ($34.99) Exhaust Tailpipe ($60.43) & Exhaust Hanger ($37.91) at work by carelessly leaving it behind.I’ve always wanted a valve style muffler and these are discontinued.
Muffler $54.75
DYNOMAX 17959
Last edited by SixSeriesCSi; Jan 6, 2022 at 12:18 PM. Reason: Lost Parts
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Rear View Mirror Mounting Tab reattached
$15 @ Sinaloa Auto Glass in Bellflower
$15 @ Sinaloa Auto Glass in Bellflower
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Replaced the middle & upper Intake Manifold Gaskets. The upper Intake Manifold & Idle Air Control housing were sandblasted @ Freddy’s Carburetor in Paramount, CA. The Throttle Body & Idle Air Control Valve were thoroughly cleaned but I did reuse the IAC Valve O-ring & IAC housing gasket. Addressed a small pitted Coolant Nipple leak with some Steel Reinforced Epoxy from Post #58. Bolts, Spacers & Washers were simply esthetic...
Sandblasting Service Fee $40.00
Intake Manifold Gaskets $29.55
Stainless Steel Cap Screws $13.63
Viton O-rings $9.84
Chrome Steel Spacers $4.66
Stainless Steel Washers $1.64
Stainless Steel Nuts $0.90
3.1L V6 Powa!
Sandblasting Service Fee $40.00
Intake Manifold Gaskets $29.55
Stainless Steel Cap Screws $13.63
Viton O-rings $9.84
Chrome Steel Spacers $4.66
Stainless Steel Washers $1.64
Stainless Steel Nuts $0.90
3.1L V6 Powa!
Last edited by SixSeriesCSi; Sep 28, 2020 at 09:27 AM. Reason: Line Spacing
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Wondering why my Vehicle Registration is more this year than last
? Nevertheless, I went for a drive to celebrate my timely payment 
2020 CA Registration $171.00
Credit Card Service Fee $3.59
Seal Beach, CA
? Nevertheless, I went for a drive to celebrate my timely payment 2020 CA Registration $171.00
Credit Card Service Fee $3.59
Seal Beach, CA
Last edited by SixSeriesCSi; Jul 10, 2023 at 06:31 PM. Reason: Location
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
85K Mile Service
Oil $26.23
Oil Filter $7.00
Air Filter $9.00
Friction Modifier $20.81
Engine Flush $0.00 (Amazon)
Only the Best for 91 Bird
Oil $26.23
Oil Filter $7.00
Air Filter $9.00
Friction Modifier $20.81
Engine Flush $0.00 (Amazon)
Only the Best for 91 Bird
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Upgrading to a UMI 35mm (1-3/8”) Front Sway Bar with the appropriate Relocation Brackets & paired with a UMI Front Lower Chassis Steering Brace.
Front Sway Bar & Relocation Brackets $248.99 + Tax ($23.65) - $25.00 (Summit Bucks) = $247.64
Front Lower Chasis Steering Brace $71.99
UMI 2117 & UMI 2030
Front Sway Bar & Relocation Brackets $248.99 + Tax ($23.65) - $25.00 (Summit Bucks) = $247.64
Front Lower Chasis Steering Brace $71.99
UMI 2117 & UMI 2030
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Lund Pro-Line Grey Carpet (Cut Pile) $232.99 + Tax @ $22.14 - $50.00 (Summit Bucks) = $205.13
Berber Floor Mats from Cover Craft $0.00 (Summit Racing)
Floor Mats $30.65
Berber Floor Mats from Cover Craft $0.00 (Summit Racing)
Floor Mats $30.65
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Cerritos, CA
Last edited by SixSeriesCSi; Jul 10, 2023 at 06:31 PM. Reason: Location
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
I’ve had a misfire for some time but left as-is because it sounded cool
Unfortunately, over time it got progressively worse and blew out my Catalytic Convertor. Cylinder #2 had a stuck Injector so I decided to ditch the OEM Rochester Injectors. Hopefully these eBay “UPGRADE” Injectors are effective...
Six (6) Injectors @ $51.45
Six (6) Injectors @ $51.45
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Keys went missing! 
$245.00 Labor for Interrogation of VATS & Keys @ Oscar's Locksmith
$180.00 Labor for Steering Column @ Pablo's Locksmith
$58.82 Ignition Switch from NAPA
$6.58 VATS Bypass Resistor Kit
Purchased a Vintage 1991 MOMO Steering Wheel back in April of 2019 that I'm looking forward to installing...

$245.00 Labor for Interrogation of VATS & Keys @ Oscar's Locksmith
$180.00 Labor for Steering Column @ Pablo's Locksmith
$58.82 Ignition Switch from NAPA
$6.58 VATS Bypass Resistor Kit
Purchased a Vintage 1991 MOMO Steering Wheel back in April of 2019 that I'm looking forward to installing...
Last edited by SixSeriesCSi; Nov 6, 2023 at 08:12 PM.
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Attending my 3rd Car Show
(reference post #35).
Definitely bittersweet as my first was in 2017 @ThePhenoixClub, for 2018 I did not attend @PetersonAutomotiveMuseum, 2019 @OakCanyonPark with my kids in my 1989 Pontiac Firebird Formula 350, 2020 is self-explanatory and now 2021...
$40.00 from @nightshiftracing
Definitely bittersweet as my first was in 2017 @ThePhenoixClub, for 2018 I did not attend @PetersonAutomotiveMuseum, 2019 @OakCanyonPark with my kids in my 1989 Pontiac Firebird Formula 350, 2020 is self-explanatory and now 2021...
$40.00 from @nightshiftracing
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
@ RADWOOD SoCal 2021
Last edited by SixSeriesCSi; Nov 22, 2021 at 02:04 PM. Reason: Grammar
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Injectors were installed without retaining clips so that needed to be addressed (Post # 160) along with the injector o-rings, which were replaced with Fel-Pro, # 70599 for better fitment. The EGR tube gasket was also replaced with Fel-Pro, # 70411. Unfortunately, one of the two threads for the EGR tube mounting isn’t looking so great.
Fuel Injector O-Rings $15.79
Fuel Injector Clips $13.83
EGR Tube Gasket $0.00 (AutoZone Rewards)
Fuel Injector O-Rings $15.79
Fuel Injector Clips $13.83
EGR Tube Gasket $0.00 (AutoZone Rewards)
Last edited by SixSeriesCSi; Jan 6, 2022 at 12:52 PM. Reason: Pricing
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
ALDL CODE 15
Coolant Temperature Sensor @ 85,558mi
Coolant Temperature Sensor $29.76
Coolant Temperature Sensor @ 85,558mi
Coolant Temperature Sensor $29.76
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
91 Bird @ SC Fuels #6
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
No but it was my Daily Driver for a couple years...
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Oil Stabilizer $0.00 (Auto Zone Rewards)
87K Miles approximately
Added some Stickers to the Engine Bay to accentuate that V6 Powa!
87K Miles approximately
Added some Stickers to the Engine Bay to accentuate that V6 Powa!
Last edited by SixSeriesCSi; Oct 18, 2022 at 07:37 PM. Reason: Added Commentary
Joined: Nov 2002
Posts: 6,636
Likes: 402
From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1991 Bird
Dont go too crazy on the stickers. Looks fine without em. Do your rewards expire after if you done use them?
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
USED Hood $20.00 (OfferUp!)
Misc. Primer, Hardner, Paint & supplies provided by Summit Racing - FREE
The Hood from my 1989 Formula 350 was swapped for a Fiberglass Cowl Induction Hood so I had that hood repainted in Bright Red VS White. I had originally provided the Auto Body Shop with SEM Hot Rod Satin Black which was FREE from Summit Racing but either they used it for something else or it was misplaced? The Hood spent a couple years (+3/4) at the Auto Body Shop and while I could have probably paid less since they lost my supplies, I felt it was right to redress for the passing of such a long period of time...
Paint & Labor $250.00
The Passenger Headlight Cover will need to be painted from the accident, Post # 36. Hopefully, I can get that done along with the Front Bumper soon.
Misc. Primer, Hardner, Paint & supplies provided by Summit Racing - FREE
The Hood from my 1989 Formula 350 was swapped for a Fiberglass Cowl Induction Hood so I had that hood repainted in Bright Red VS White. I had originally provided the Auto Body Shop with SEM Hot Rod Satin Black which was FREE from Summit Racing but either they used it for something else or it was misplaced? The Hood spent a couple years (+3/4) at the Auto Body Shop and while I could have probably paid less since they lost my supplies, I felt it was right to redress for the passing of such a long period of time...
Paint & Labor $250.00
The Passenger Headlight Cover will need to be painted from the accident, Post # 36. Hopefully, I can get that done along with the Front Bumper soon.
Last edited by SixSeriesCSi; Oct 24, 2022 at 07:08 PM. Reason: Grammer
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
My Son's first drive on the Highway & it’s behind the wheel of 91 Bird
605 Southbound, CA
605 Southbound, CA
Last edited by SixSeriesCSi; Jul 10, 2023 at 06:33 PM. Reason: Location
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Almost all the parts I've replaced so far have been aftermarket, so I finally decided to try NEW Reproduction from HawksMotorSports. Not sure how I feel about doing business with them as they shipped me the incorrect item and there was some confusion on the matter which resulted in an expedited shipping charge for the return/exchange. The Door Sill Plates look great but unfortunately my Driver's Side Door Hinge Pin seems to be in need of replacement as there is visible wear on the Ground Effects and paint transfer on the Door Sill Plate.
Grey Door Sill Plates @ $142.60 with Tax and expedited Shipping
Grey Door Sill Plates @ $142.60 with Tax and expedited Shipping
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
The Battery that came with the car finally gave out; it was dated Jan. 2017. In keeping with the theme of the vehicle, it seemed fitting to settle on a USED Durlalast Battery.
I think it was a good deal since it's an Enhanced Flooded Battery (EFB) dated Jul. 2021 in a H6 Size so adapters are required.
USED Battery $100.00 (OfferUp!)
Battery Terminal Adapters $5.51
Battery Terminal Bolts $
Battery Terminal Protectors $
I think it was a good deal since it's an Enhanced Flooded Battery (EFB) dated Jul. 2021 in a H6 Size so adapters are required.
USED Battery $100.00 (OfferUp!)
Battery Terminal Adapters $5.51
Battery Terminal Bolts $
Battery Terminal Protectors $
Last edited by SixSeriesCSi; Jun 4, 2023 at 12:06 AM.
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
I went to visit my Mom for Mother's Day this past Sunday and she hadn't seen 91 Bird in a while… I think she was surprised that it was able to make the trek from Los Angeles to the High Desert which is actually 91 Bird’s longest road trip at +170 Miles round-trip.
Victorville, CA
Victorville, CA
Last edited by SixSeriesCSi; Jul 10, 2023 at 06:33 PM. Reason: Location
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
USED Rear Seats with Brackets & Levers $50.00 (OfferUp!)
Neutral Cuir Leather
Neutral Cuir Leather
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
90K Mile Service
Hood Seal $0.00 (Summit Racing)
Oil Filter $5.47
Air Filter $9.26
Oil $25.00
Friction Modifier $30.68
Passenger Window Adjustment $45.00
Serpentine Belt $60.08
Refrigerant $67.30
Spark Plugs $67.19
Exhaust Turndown $125.00
Front Tires $194.90
Mounting & Balancing + Tire Disposal $56.00
Hood Seal $0.00 (Summit Racing)
Oil Filter $5.47
Air Filter $9.26
Oil $25.00
Friction Modifier $30.68
Passenger Window Adjustment $45.00
Serpentine Belt $60.08
Refrigerant $67.30
Spark Plugs $67.19
Exhaust Turndown $125.00
Front Tires $194.90
Mounting & Balancing + Tire Disposal $56.00
Last edited by SixSeriesCSi; Aug 25, 2024 at 09:16 PM. Reason: Prices
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Attending my 4th Car Show (reference post #164)
Skipped the 2022 RADwood because the location was the same as 2022 RADwood...
$102.25 for that coveted “Royalty Vehicle”
Skipped the 2022 RADwood because the location was the same as 2022 RADwood...
$102.25 for that coveted “Royalty Vehicle”
Last edited by SixSeriesCSi; Nov 21, 2024 at 06:35 PM. Reason: Grammer
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Joined: Sep 2000
Posts: 2,498
Likes: 193
From: Moorpark, CA
Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: 1991 Bird
Nice job with the car. Couple questions. 1) What's with the headlight that won't go down? If its the motor, it should be a pretty easy fix. 2) It looks like you have the MAP sensor mounted to the firewall cowl. Did you do that or is that normal on the V-6's? Are there vacuum lines running to them? I don't see any in the pics. BTW, if you're ever up on the Ventura County area with this car, let me know. Maye we can meet up somewhere.
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
@blacksunshine'91 1) The Headlight needs to be addressed; in the meantime, I just disconnected & left it open. 2) It's original position I believe as my 1989 Formula 350 with a MAP Sensor was identical. The Vacuum Lines aren't visible but they're there…
Ventura would be sweet! Let’s link up for 2024
Ventura would be sweet! Let’s link up for 2024
Last edited by SixSeriesCSi; May 14, 2025 at 10:46 AM. Reason: Grammer
Joined: Sep 2000
Posts: 2,498
Likes: 193
From: Moorpark, CA
Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: 1991 Bird
@blacksunshine'91 2) It’s original position I believe as my 1989 Formula 350 with a MAP Sensor was identical.
Ventura would be sweet! Let’s link up for 2024
Ventura would be sweet! Let’s link up for 2024
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Commerce, CA
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
Front Rotors $159.30
Front Pads $0.00 (AutoZone LLW)
Wheel Seals $7.92
Dust Caps $13.20
Front Pads $0.00 (AutoZone LLW)
Wheel Seals $7.92
Dust Caps $13.20
Last edited by SixSeriesCSi; Aug 25, 2024 at 09:14 PM.
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
The Heater Control Valve that was replaced in Post #135 failed and it seems the price doubled in four years 
Heater Control Valve $34.01

Heater Control Valve $34.01
Last edited by SixSeriesCSi; Jun 16, 2024 at 10:38 AM.
Thread Starter
Joined: Jun 2009
Posts: 861
Likes: 33
From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: 1991 Bird
I'm going to decrease my Oil Change Interval (OCI) as Ol' 91 Bird nears 100,000mi.
2025 CA Registration $193.00
Credit Card Service Fee $3.76
2025 CA Registration $193.00
Credit Card Service Fee $3.76
Last edited by SixSeriesCSi; Aug 26, 2024 at 03:36 PM. Reason: Grammer
Joined: Nov 2002
Posts: 6,636
Likes: 402
From: Oyth
Car: 89RS vert
Engine: Erod
Transmission: 4L65e
Axle/Gears: BW, 3.27
Re: 1991 Bird
What's your interval cycle? I change my oil/filter once a year! Scary, but i don't put that many miles on it, synthetic too if that means anything.











