Revs up ok and then bogs out under acceleration at around 3k
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Revs up ok and then bogs out under acceleration at around 3k
Hello everyone ! Ok here is where I'm at , I just did a complete tpi swap, and added a cam (lt1 94) ok I have the timing set to 8 btdc and she has a good idle nice crisp rev but when I dump the clutch she goes and like cuts out but doesn't shut off ... When I let off throttle she purrs and drives great up till 3k ? I may be low on fuel?? Oh and she's speed density off a 92 5speed any ideas would be great thanks for taking a look
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Did the "complete" swap include a fuel pump?
You changed the cam and put better exhaust on it. I don't see "computer tune" on the list.
You changed the cam and put better exhaust on it. I don't see "computer tune" on the list.
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
No cats
Headers to y pipe .. It runs fine except under load
Headers to y pipe .. It runs fine except under load
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok just went outside and started her up.. When I revved the engine it revved but after 4k the volt meter dimmed ???? And shortly after starting it the 3k stalling started
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Yeah I did the fuel pump 255
And it's not much bigger than the l98 cam I figured the stock tune would be fine . Speed density btw... And it came off a g92 Camaro
And it's not much bigger than the l98 cam I figured the stock tune would be fine . Speed density btw... And it came off a g92 Camaro
#7
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Re: Revs up ok and then bogs out under acceleration at around 3k
if in fact the charging system has issues voltage will effect injector pulse width. A stock $8d calibration will work fine with a lt1 cam untuned but does leave room for improvement. The sa and iac control for a automatic .bin is alot different for a manual .bin as well as injector constant and ve from a 305 to a 350 calibration unstated information on your post.
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Well everything is off the 5 speed and my car was a stock 5speed tbi
It's always been a 305 ... What could be causing it ?? Maybe the icm??
It's always been a 305 ... What could be causing it ?? Maybe the icm??
#9
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Re: Revs up ok and then bogs out under acceleration at around 3k
Its hard to say over the net if you are having a lean condition( injectors) or a spark related issue. It could be the cap/rotor, retarded base timing , icm , crack between the magnetic poles, a problem with the white wire from the ecm to the icm for est control.
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok I'll take a video in a couple of mins to show you what it's doing , no heated o2 it's actually just plugged in and placed under the hood :/ I know I know .. My tbi ran great with out it ... Ill have a video up in a few
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
My timing is set to 8* btdc and it runs fine just stalls or drops volts
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok here is the vid with both symptoms maybe you can identify something
#15
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Re: Revs up ok and then bogs out under acceleration at around 3k
looks like a ignition cut out like a failing icm or ignition coil break up. The $8d programing does allow a rpm limiter to be set but if this is a stock memcal that wouldn't cause your isses. I would install a heated o2 your allways going to be running rich. A o2 sensor is not just one of those just for the hell of it extra parts they throw on the car.
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Alright , it'll be about two weeks for the o2, but I have life time warranty on both the coil and the icm so those will be switched out today well not til tonight . I'll post up my progress tonight , and would one of those cAuse the volts to drop ?
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Will do, although I just replaced my alt about a month ago, everything has been triple checked ? Could it be the alt pig tail ??
#19
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Oh and thanks again for all the help I love this site
#20
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Re: Revs up ok and then bogs out under acceleration at around 3k
I don't think its the pigtail, The sence wire goes to your cooling fan relay I would check that for corosion or a damaged connector. This is another way of wiring the cs just jumper the sense to the battery output.
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
I have the tpi harness but only used a single fan relay could the left over wire be grounding out ?? But it' is tucked away from anything
#23
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok I didn't get a chance to swap out or have the parts checked out . But I just let the engine run for a while and when it got warm great idle and would rev up to 4500 and then bog but nothing like when it was cold ?? Icm maybe ?
#24
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Re: Revs up ok and then bogs out under acceleration at around 3k
at 4500 the tpi isn't breathing well and your not making much hp, that could be valve float. If its just a issue when the engine is warm it could be the icm effected bye heat. Not sure what to tell you you got a odd one.
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Car: 1987 IROC Z28
Engine: 305 TPI
Transmission: TKO 600
Axle/Gears: 3.45 (G92 package)
Re: Revs up ok and then bogs out under acceleration at around 3k
I had the same issue when the car was cold, not warm. At first got new cap, rotor, wires, timing, etc.... took care of the bogging down at high RPM. But still had a lot of stumbling/popping on takeoff and then put an OEM ICM back into the engine and BOOM problem solved.
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok I'll try the original icm in a. Few mins if that works which I hope it does you'll hear back good or bad thanks
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok check it .... I brought up the connector to the alt earlier on and I didn't have the garage key so I couldn't try out the icm but I did mess with the alt connector .. I wiggled it popped it off and plugged it back in with my palm and the volt read normal revved fine no volt drop and I felt second gear spin the wheel clutch dump ... Wth!!!
#28
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok annnnnnd.... Stalling under load again ?? I'm going to swap in tpi icm be back on in a few mins
#29
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok I swapped the icm and got the same result but instead of 4k it was at 3k
#30
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Any suggestions ???? Thanks
#31
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Changed my tps and map .. No engine codes popping up just 12 and now she pops and holds idle at 4 k ??
#32
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Car: 1987 IROC Z28
Engine: 305 TPI
Transmission: TKO 600
Axle/Gears: 3.45 (G92 package)
Re: Revs up ok and then bogs out under acceleration at around 3k
if you changed out your TPS you need to make sure it is at the right voltage otherwise it will be throwing off your computer... there are plenty of articles on how to use a multimeter to check the voltage with the key in the on position, and by adjusting the sensor up or down you can adjust the voltage. You also want to make sure that the voltage fluctuation is smooth and uniform from about .59 to over 4 at WOT....
However it seems like you have a multitude of problems and maybe let someone who is an expert take a gander under the hood.
However it seems like you have a multitude of problems and maybe let someone who is an expert take a gander under the hood.
#33
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Car: 1987 IROC Z28
Engine: 305 TPI
Transmission: TKO 600
Axle/Gears: 3.45 (G92 package)
Re: Revs up ok and then bogs out under acceleration at around 3k
and any chance you're using the wrong computer/chip combo since you switched to a speed density?
#34
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
The entire swap came off a 92 g92 car or 5speed 230 hp set up l98 cam and the 081 heads was running before the swap although I used a really old distributor that was a hand me down from a shop that worked ok with the tbi
#35
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok I ordered a new distributor , I'll let y'all k ow what happens
#36
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
if in fact the charging system has issues voltage will effect injector pulse width. A stock $8d calibration will work fine with a lt1 cam untuned but does leave room for improvement. The sa and iac control for a automatic .bin is alot different for a manual .bin as well as injector constant and ve from a 305 to a 350 calibration unstated information on your post.
thanks again ! hopefully i can be again!! if that solves the "ghost" in my car
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Car: 1988 Camaro Iroc
Transmission: 5 spd
Re: Revs up ok and then bogs out under acceleration at around 3k
Take a look at your ignition module, I had the same issue and after replacing it I fixed the problem.
#38
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
If this dist doesn't solve the problem .. I'm buying the fuel lines for my lt1 and it's swap time I really wanted to see what a good 305 can do but I've lost my Patients
#39
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok I drove the maro to the gas station to see if my gauge was working (aftermarket fuel) and it worked prior to the pump swap ok here is what happened .. Put 25 in the tank wouldn't move past 35k and as I was getting down the street the engine just stalled out I wasn't even touching the pedal !! After it stalled out she started up and ran kinda ok it was up hill slightly ?? And the temp had just reached 190 or so ?? Also I had the rpm needle bounce around .... What would happen if I placed the fuel pump in wrong ?
#40
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok guys I just received my dist. I will be installing it tonight I will keep y'all updated
#41
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ok guys swapped in the new dizzy last night and .........the problem is still there
#42
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Revs up ok and then bogs out under acceleration at around 3k
Ohm my injectors while hot and all were at 17.9 ??? Could it really be my fuel pressure ? Just replaced my pump with a 255 please help
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