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Search: Posts Made By: BackInBlackGP
Showing results 1 to 50 of 346
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Forum: V6
05-05-2021, 08:49 PM
Replies: 0
Views: 390
Posted By BackInBlackGP

Anyone have a sensor diagram for the 2.8 LIM?

Howdy! Looking to see if anyone has a diagram of the sensors screwed into the lower intake manifold on the '86 2.8 motor? I feel like I should probably change them for good luck while I've got the...
Forum: V6
05-05-2021, 07:52 PM
Replies: 11
Views: 889
Posted By BackInBlackGP

Re: Need help with a sensor on passenger side of motor behind the head.

Looks like the knock sensor to me...?
Forum: V6
05-02-2020, 03:48 PM
Replies: 1
Views: 524
Posted By BackInBlackGP

1986 2.8 replaced injectors, now shudders at idle and has less power...

Howdy all. Decided it was time to replace the 30+ year old MFI injectors with a flow matched set of Bosch disc type with the same flow rate as the stock Delco ones. Now the engine appears louder...
Forum: History / Originality
08-30-2017, 09:13 PM
Replies: 2
Views: 402
Posted By BackInBlackGP

Missing some RPO codes from my '86...

Came across my detached RPO sticker the other day. Just for kicks I decided to look them all up and make a spreadsheet. Couldn't find any information on four codes. Does anyone have any more...
Forum: Tech / General Engine
05-27-2014, 07:35 PM
Replies: 2
Views: 567
Posted By BackInBlackGP

Service Engine Light, Codes 33 and 45...

Well, just ran into my first problem with this car in it's 28 years...

Idles and runs really choppy randomly. Finally it set a pair of codes: 33 and 45.

33 is for MAF high voltage and 45 is...
Forum: V6
08-15-2012, 06:29 AM
Replies: 8
Views: 1,193
Posted By BackInBlackGP

Re: Lost my low end due to oversized exhaust?

Well, BOTH of course! :lmao:
Forum: V6
08-14-2012, 10:48 PM
Replies: 8
Views: 1,193
Posted By BackInBlackGP

Lost my low end due to oversized exhaust?

So, about 15 years ago when the original muffler broke, I replaced everything with a catback 2½" kit from Dynomax. Oops. Now it appears that I've lost all my low end scavenging and torque. The...
Forum: Wheels and Tires
08-13-2012, 05:40 PM
Replies: 5
Views: 3,238
Posted By BackInBlackGP

Re: What is the stock tire size on my 86 supposed to be?

Ok, so the 215/65-15 makes some sense as being the original size with the rubbing issues. Now, since I drive the thing about 1,000 miles / year, I see no need to pick up expensive 60,000 miles tires...
Forum: Wheels and Tires
08-11-2012, 07:23 PM
Replies: 5
Views: 3,238
Posted By BackInBlackGP

What is the stock tire size on my 86 supposed to be?

Hello all. My 15 year old tires are finally worn out and need to be replaced. The size that was on the car when I bought it are 235/60-15. The fronts happen to rub a tiny bit on the inner fender...
Forum: Engine/Drivetrain/Suspension Parts for Sale
10-03-2010, 08:35 AM
Replies: 1
Views: 559
Posted By BackInBlackGP

Re: Custom stainless steel stock style K&N filter adapter

Bump. I still have this thing kicking around in the garage. Will take best offer + shipping at this point...
Forum: V6
10-03-2010, 08:31 AM
Replies: 34
Views: 10,815
Posted By BackInBlackGP

Re: 2.8L 89 RS Supercharger Q's

I was on vacation one summer and the heater core popped. Did what I had to to get home. Turned out that I actually liked the idea of not having hot air blown on me all summer long, so I made it a...
Forum: V6
09-30-2010, 10:10 PM
Replies: 205
Views: 46,310
Posted By BackInBlackGP

Re: Ditch your stock injectors!

So, is this what we're looking for?

http://www.southbayfuelinjectors.com/Remanufactured-15lb_Firebird_1985_1992_3_1_TPi.html
Forum: V6
09-30-2010, 09:18 PM
Replies: 34
Views: 10,815
Posted By BackInBlackGP

Re: 2.8L 89 RS Supercharger Q's

That looks like an Eaton from the S/C Grand Prix family...

As for blocking off the coolant lines to the TB: Do you just install a bypass elbow or do you block them off completely, stopping...
Forum: V6
09-30-2010, 09:13 PM
Replies: 8
Views: 810
Posted By BackInBlackGP

Re: My car died out on me for 10mins, then it started running good...umm confused...

I've been there... Took a while for the random failure to become not-so-random... Turned out the ignition coil was flakey. I had to wait until it finally died before I fixed my absolutely random...
Forum: V6
09-29-2010, 11:50 AM
Replies: 47
Views: 3,336
Posted By BackInBlackGP

Re: Two quick 2.8 questions...

Well, I had called GM and they told me that the particular valve I have was only used on the f-body 2.8 for those years. The 2.8 Fiero either had a different model or none at all.
Forum: V6
09-28-2010, 07:23 PM
Replies: 47
Views: 3,336
Posted By BackInBlackGP

Re: Two quick 2.8 questions...

And just for fun, here is the aforementioned now 25 year old paint... ;)

405378
Forum: V6
09-28-2010, 07:17 PM
Replies: 47
Views: 3,336
Posted By BackInBlackGP

Re: Two quick 2.8 questions...

From what research I've done, it appeared ONLY in the 1986-88 Firebirds with the 2.8 and the 5-speed. The V8 with the manual did not get one. I contacted GM, who contacted the folks who buy up all...
Forum: V6
09-26-2010, 05:55 PM
Replies: 47
Views: 3,336
Posted By BackInBlackGP

Re: Two quick 2.8 questions...

Back from the dead!!! Turns out my problem from EIGHT years ago is a sticky or slow deceleration valve. (Yes, that magical non-existent device mentioned in my original post). Despite my best...
Forum: Engine/Drivetrain/Suspension Parts for Sale
08-26-2009, 09:20 PM
Replies: 1
Views: 559
Posted By BackInBlackGP

Custom stainless steel stock style K&N filter adapter

Decided to try something different using intake parts from a Grand National, so I'm selling my home-made stainless filter adapter. 302 or 316 (Can't remember) stainless steel construction with great...
Forum: Interior
10-04-2008, 08:39 AM
Replies: 4
Views: 1,182
Posted By BackInBlackGP

Rolling odometer forward...

A long time ago, I swapped out my 85mph speedo with a 140mph speedo. The new speedo had about 20k less mileage on it than my original. I've finally tired of keeping track of the mileage manually so...
Forum: Electronics
09-18-2008, 08:44 PM
Replies: 2
Views: 402
Posted By BackInBlackGP

Re: Will This fit and work without .......

I crammed a 94-02 Grand Prix head unit in with a little bit of work...

https://www.thirdgen.org/forums/car-audio/464238-requested-photo-4th-gen.html
Forum: Electronics
09-11-2008, 08:25 PM
Replies: 13
Views: 994
Posted By BackInBlackGP

Re: Lights In Gauge Cluster No Longer Work

The dimmer switch is merely an input to the load transistor under the dash, just to the left of the center console.

Transistor looks like this:

443475

443476

I would replace that, since...
Forum: Electronics
09-11-2008, 08:22 PM
Replies: 5
Views: 587
Posted By BackInBlackGP

Re: one HID cuts off

Swap bulbs or ballasts and see where the problem goes. Also check your wiring to be sure you don't have anything loose.


The bottom line with HID kits: "Made in China"... They all have a high...
Forum: Electronics
09-10-2008, 12:32 AM
Replies: 6
Views: 622
Posted By BackInBlackGP

Re: Turn signal headlight idea.

Ah, yes... The old-school turning lamps...

You'll need a set of lamps to illuminate and then design yourself a "missing-pulse" detection circuit to light the appropriate lamp and turn it off when...
Forum: Electronics
09-09-2008, 09:56 PM
Replies: 14
Views: 1,161
Posted By BackInBlackGP

Re: My HID installation

THE trick to making aftermarket HID kits work correctly in reflective headlamp housings, is to be absolutely sure that the HID arc is produced in EXACTLY the same location and orientation as the...
Forum: Electronics
09-09-2008, 09:49 PM
Replies: 2
Views: 624
Posted By BackInBlackGP

Re: 1986 Firebird Charging problems!!!

My 86 used to eat alternators yearly as well. Luckily, the current one has been in there for about 5 years, but I think it's the 4th or 5th one I've installed...
Forum: V6
08-24-2008, 08:37 AM
Replies: 10
Views: 3,564
Posted By BackInBlackGP

Re: how to check iac ?

My 86 does the same thing. I have disassembled and completely cleaned the IAC motor and pintle assembly, but with no avail... Small vacuum leak somewhere perhaps? One of these days, I'll get...
Forum: Electronics
08-23-2008, 10:27 AM
Replies: 13
Views: 1,383
Posted By BackInBlackGP

Re: Power Transistor help!!!

Do you have any aftermarket gauges or whatnot tied into the dimming circuit?
Forum: Suspension and Chassis
08-23-2008, 10:24 AM
Replies: 6
Views: 615
Posted By BackInBlackGP

Re: Different tire sizes for front and rear...

Well, I drive it about 700 miles a year. That might have something to do with it...
Forum: V6
08-23-2008, 10:18 AM
Replies: 5
Views: 723
Posted By BackInBlackGP

Re: 2.8l intake

I pulled some intake parts from an 87 GN and installed it under the hood of my 86. Built a custom filter assembly as well. Pardon the filth... It hasn't been driven or cleaned in a while...
...
Forum: Engine Swap
07-28-2008, 03:58 PM
Replies: 18
Views: 11,509
Posted By BackInBlackGP

Re: NA 3.8 into a 3rd gen thoughts/plans

Edit: Fixed the WS1 designator and the 3.42 ratio. (Found my build card...)

I have no problem not calling it a T/A, but it does have factory T/A parts on it... I could see an error with the DMV...
Forum: Engine Swap
07-28-2008, 08:49 AM
Replies: 18
Views: 11,509
Posted By BackInBlackGP

Re: NA 3.8 into a 3rd gen thoughts/plans

The SE model came stock with the 2.8, T5, upgraded instrument cluster, upgraded tail lamps, upgraded WS1 suspension, 3.42 posi rearend, color matched alloy wheels, leather wheel & shift knob, locking...
Forum: Engine Swap
07-27-2008, 09:10 PM
Replies: 18
Views: 11,509
Posted By BackInBlackGP

Re: NA 3.8 into a 3rd gen thoughts/plans

I'm interested in this thread as well... I have a 1997 series II 3800 with the wiring harness and PCM sitting around that might look nice under the hood of the 'Bird.

Is there a list yet of what...
Forum: Electronics
07-03-2008, 06:48 AM
Replies: 8
Views: 686
Posted By BackInBlackGP

Re: My blinkers are ssslllooowww, Help me fix them?

The reason I installed my prototype was so I could manually match the flash rate close to what was standard for the mid-80's, which indeed is a little slower than today's standards. IIRC, today is...
Forum: Electronics
07-02-2008, 11:26 AM
Replies: 8
Views: 686
Posted By BackInBlackGP

Re: My blinkers are ssslllooowww, Help me fix them?

Bi-metal thermal flashers don't last forever. They do wear out and need to be replaced eventually. Mine got so slow that it was painful, so I just popped in a newer GM one.

As far as "modified"...
Forum: Electronics
06-30-2008, 01:12 PM
Replies: 8
Views: 686
Posted By BackInBlackGP

Re: My blinkers are ssslllooowww, Help me fix them?

I adapted a newer w-body electronic flasher with no problems.

https://www.thirdgen.org/forums/electronics/442521-easy-diy-electronic-turn.html
Forum: Tech / General Engine
05-05-2008, 05:09 PM
Replies: 1
Views: 515
Posted By BackInBlackGP

Cleaning the MAF element

What chemical / procedure are you guys using to clean the MAF element? In the newer throttle bodies, I clean with plastic safe TB cleaner, but the MAF unit on the '86 is as you know remotely mounted...
Forum: V6
05-03-2008, 12:10 PM
Replies: 2
Views: 694
Posted By BackInBlackGP

Re: Sluggish IAC motor?

Kill? Won't stall at all, just keeps the RPMs up too high for too long. After it calms down, it idles just fine. I will try disconnecting the MAF when the weather cooperates. BTW, after it warms...
Forum: V6
05-02-2008, 11:58 PM
Replies: 2
Views: 694
Posted By BackInBlackGP

Sluggish IAC motor?

'86 2.8: Between shifts, the RPMs stay high for way too longs, and I get into the next gear with the engine turning too fast. Sitting still, I can rev it, and the tach stays up there for more than a...
Forum: Suspension and Chassis
04-26-2008, 07:03 PM
Replies: 6
Views: 615
Posted By BackInBlackGP

Different tire sizes for front and rear...

How bad will this look?

Front: 235/60-15
Rear: 255/55-15

I can't go wider in the front, because the tires will rub the swaybar, so I'm going to leave those the stock size. Will the rear...
Forum: Car Audio
04-25-2008, 12:26 AM
Replies: 10
Views: 1,835
Posted By BackInBlackGP

Re: Requested: photo of 4th gen Delco head unit.

Now that's just damn sexy right there:

http://i154.photobucket.com/albums/s270/1997GPSE/86SE/IMG_5302.jpg

http://i154.photobucket.com/albums/s270/1997GPSE/86SE/IMG_5306.jpg
...
Forum: Car Audio
04-24-2008, 09:11 PM
Replies: 10
Views: 1,835
Posted By BackInBlackGP

Re: Requested: photo of 4th gen Delco head unit.

Ok, so after a bit of hackin' it's all good. I thought long and hard about cutting the inside of the radio pod. I then decided that I still want to put the original back eventually, so I chose my...
Forum: Car Audio
03-09-2008, 09:20 PM
Replies: 17
Views: 4,794
Posted By BackInBlackGP

Re: Would anyone be down for a Delco radio ipod input DIY?

We have a lengthy thread over on the GP site... :)

http://www.clubgp.com/newforum/tm.asp?m=3273349&p=1&tmode=1&smode=1

You can also easily mod your tape deck unit and add an input.
Forum: Car Audio
03-06-2008, 08:52 PM
Replies: 10
Views: 1,835
Posted By BackInBlackGP

Re: Requested: photo of 4th gen Delco head unit.

I'm planning on trimming the radio, not the car. I have no issues with relocating circuit boards to make this fit. :cool: My car is almost completely untouched, and I plan on keeping it that way. ...
Forum: Car Audio
03-06-2008, 11:22 AM
Replies: 10
Views: 1,835
Posted By BackInBlackGP

Requested: photo of 4th gen Delco head unit.

I have a bunch of 97-03 Grand Prix head units kicking around in the house, and I'm thinking of installing a modified one into the FireBird. I know the 4th gen radios have been installed into the 3rd...
Forum: V6
02-16-2008, 08:50 AM
Replies: 1
Views: 466
Posted By BackInBlackGP

Just for giggles: What do you think my car's value is?

Not thinking of selling, but just curious. I hope someday that my 4yo son will get to have it...

86 T/A Special Edition package, ~75k original miles, original paint, absolutely no rust, almost...
Forum: V6
09-30-2007, 08:39 PM
Replies: 21
Views: 2,206
Posted By BackInBlackGP

Anyone here have a cammed 2.8?

And would you mind posting an exhaust sound clip for me? When I get around to replacing the intake manifold gaskets, I'm thinking of installing a cam just for fun... Thanks!
Forum: Electronics
09-30-2007, 08:18 PM
Replies: 3
Views: 1,512
Posted By BackInBlackGP

Re: Shaved Door Handle Button

Hide a magnetic reed switch in one of the side-view mirrors. Trigger it with a laptop voice coil magnet on your keychain...
Forum: Electronics
09-30-2007, 08:16 PM
Replies: 0
Views: 3,297
Posted By BackInBlackGP

Easy DIY electronic turn signal flasher.

Pulled the flasher socket from my 97 Grand Prix, and installed one of my modified flasher modules with adjustable timing. Installs in 5 minutes, with no alterations to the factory Firebird wiring.
...
Forum: Interior
08-02-2007, 08:57 AM
Replies: 14
Views: 1,308
Posted By BackInBlackGP

Re: Leave T-tops In or Out When parked? (interior aging question)

Well, I can't find the ugly old sheet, but I did come across a nice blue one that matches the car! :lmao: I only do this at work or at home. I rarely leave the car in a public parking lot/facility....
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