Just bought GTA, runs and drives fine, but no power and low shifting
Thread Starter
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Got brand new wires and put in the injectors too. Not much fun to do, but it was easy. But the only problem remaining is the ANNOYING early shifting. I've adjusted the TV cable 100 times it seems, so i know that is not it anymore. I'm going to buy a new accelerator cable tomorrow and put it in. If not, I'll look for a new TB as the spring on it is loose. If thats not it......well, I'll be getting a different car. I'm super bored with not being able to have any fun with my new car.
Supreme Member

Joined: Aug 2004
Posts: 1,214
Likes: 3
From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Unreal Kev, I wonder what the heck is going on!?
Your trans felt good when it did shift, so I doubt the
problem lies there. If it is the throttle cable or the TB,
there has got to be a way to at least test those parts.
but, I have no idea how, haha!
Your trans felt good when it did shift, so I doubt the
problem lies there. If it is the throttle cable or the TB,
there has got to be a way to at least test those parts.
but, I have no idea how, haha!
Thread Starter
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Re: Just bought GTA, runs and drives fine, but no power and low shifting
LOL!!! I might need your help this time with a TB swap. I want to check out a cable at Autozone and see how much play/slack a brand new cable has. You and Brian saw how much slack this bastard has. I can have it attached to the TB and wear it like a belt all while I'm driving the car. LOL!!! It sucks bro.
Supreme Member

Joined: Aug 2004
Posts: 1,214
Likes: 3
From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Your gunna get new/used TB? either way, whether its the cable or
a TB swap.. I can help out, Id love to meet up with Brian, considering
I didnt get the chance earlier on.
a TB swap.. I can help out, Id love to meet up with Brian, considering
I didnt get the chance earlier on.
Thread Starter
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Actually I was thinking more along the lines of swapping out yours for a test. I'm going to meet up with Brian this coming Saturday morning. I'll pick you up on the way.
Supreme Member

Joined: Aug 2004
Posts: 1,214
Likes: 3
From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Yea, I dont know if I wanna tear the beast down that far, but if
it honestly comes to that.. a six pack of beer might be in order!
As for the weekend, that sounds good.. Ill plan for it.
it honestly comes to that.. a six pack of beer might be in order!
As for the weekend, that sounds good.. Ill plan for it.
Senior Member

Joined: Mar 2009
Posts: 790
Likes: 0
From: Pigeon Forge ,TN
Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: Just bought GTA, runs and drives fine, but no power and low shifting
I'm glad to hear you got the running down now if you three can get the shiftting right you can have some real fun ahead .
Supreme Member
Joined: Nov 2003
Posts: 1,629
Likes: 17
From: Somewhere
Car: 88 IROC
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 10 bolt 3.73
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Got brand new wires and put in the injectors too. Not much fun to do, but it was easy. But the only problem remaining is the ANNOYING early shifting. I've adjusted the TV cable 100 times it seems, so i know that is not it anymore. I'm going to buy a new accelerator cable tomorrow and put it in. If not, I'll look for a new TB as the spring on it is loose. If thats not it......well, I'll be getting a different car. I'm super bored with not being able to have any fun with my new car.
Any tranny experts out there? The car is shifting about 4800 rpm instead of the 5500 rpm it is supposed to shift at.
Kevin can you manually shift the car from 1st to 2nd at 5500 rpm?
Senior Member
Joined: Oct 2002
Posts: 980
Likes: 0
From: Santa Ana CA
Car: 1991 GTA
Engine: 350 tPI
Transmission: 700r4
Axle/Gears: 342
Re: Just bought GTA, runs and drives fine, but no power and low shifting
I dunno why, but when stock the GTA used to shift at 3000 rpm. Do you have an aftermarket shift kit and I missed the post?
I used to shift mine manually at the track, although it wouldn't really make much power over 4000.
I know if I had to drive a stock 350 tpi today, it would make me cry.
I used to shift mine manually at the track, although it wouldn't really make much power over 4000.
I know if I had to drive a stock 350 tpi today, it would make me cry.
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iTrader: (2)
Joined: Aug 2005
Posts: 395
Likes: 0
From: Dayton, Ohio
Car: 1988 Trans Am
Engine: L98 355
Transmission: 700R4
Axle/Gears: 3.70
Re: Just bought GTA, runs and drives fine, but no power and low shifting
When my car was supercharged, the valves in the transmission were changed so that it would shift around 6000rpm. Without the blower, my 1-2 occurs at about 4500 rpm. Rest of the shiftpoints are fine. I just manually shift 1-2 when playing around or at the track...doesn't bother me too much.
Thread Starter
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Senior Member

Joined: Mar 2009
Posts: 790
Likes: 0
From: Pigeon Forge ,TN
Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: Just bought GTA, runs and drives fine, but no power and low shifting
I would take the belt off the front of the engine and start it and see if the humming goes away and if it does I would try and find the accessory that is causeing the humming .
Senior Member

Joined: Mar 2009
Posts: 790
Likes: 0
From: Pigeon Forge ,TN
Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Did you get the humming figured out and code 44 .
Thread Starter
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Re: Just bought GTA, runs and drives fine, but no power and low shifting
The humming is from the compressor. I made a post on it but have yet to get a response. I can live with it now that I know what it is. I figured it out because when I drive with the windows down late at night after work, the annoying humming isn't there. So I put 2 and 2 together and luckily came up with 4. LOL!!!
Supreme Member

Joined: Aug 2004
Posts: 1,214
Likes: 3
From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
Re: Just bought GTA, runs and drives fine, but no power and low shifting
So, are you satisfied with the output of the car when us three finally got
the code 33, 34, & 44 to clear and stay gone? I thought the performance
was night and day on the drive back home.
Either way, I had a blast on Saturday with you & Burnout!
the code 33, 34, & 44 to clear and stay gone? I thought the performance
was night and day on the drive back home.
Either way, I had a blast on Saturday with you & Burnout!
Thread Starter
Supreme Member

Joined: Jan 2003
Posts: 2,043
Likes: 3
From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Oh hell yeah. But at the same time, I won't be completely satisfied until the car is running that good all the time, everytime I drive it. I put the new relays in and haven't drove it yet for fear that problem will be back. I'll drive it to work here real soon with my fingers crossed.
It was fun. We all need to roll up to the Pavs one sat night and chillax. Let me know if you want my help with your fender. I would love to help get that bastard straight.
It was fun. We all need to roll up to the Pavs one sat night and chillax. Let me know if you want my help with your fender. I would love to help get that bastard straight.
Supreme Member

Joined: Aug 2004
Posts: 1,214
Likes: 3
From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
Re: Just bought GTA, runs and drives fine, but no power and low shifting
I need to motivate myself on that fender work, autobody stuff doesnt
interest me like EFI engines do!
Well, the only way to know if the 33 or 44 is intermittent is to drive it
around and pray. At least If it does happen again, we know where to
look!
Senior Member

Joined: Mar 2009
Posts: 790
Likes: 0
From: Pigeon Forge ,TN
Car: Firebird
Engine: 2.8 v/6
Transmission: t/5
Axle/Gears: open/3.42
Re: Just bought GTA, runs and drives fine, but no power and low shifting
Glad to hear you guys got it now for the compressor it could be low of oil or the clutch coil may be going bad or the bearing for the pulley making noise under load .
Junior Member
Joined: Jul 2009
Posts: 3
Likes: 0
From: portland,oregon
Car: 1982 pont t/a
Engine: will be 5.7 l98 tpi
Transmission: TH700r4
Axle/Gears: 3.73
Re: Just bought GTA, runs and drives fine, but no power and low shifting
1
Last edited by gtomark2; Jul 9, 2009 at 05:59 AM. Reason: have 2 post of the same
Junior Member
Joined: Jul 2009
Posts: 3
Likes: 0
From: portland,oregon
Car: 1982 pont t/a
Engine: will be 5.7 l98 tpi
Transmission: TH700r4
Axle/Gears: 3.73
Re: Just bought GTA, runs and drives fine, but no power and low shifting
2
Last edited by gtomark2; Jul 9, 2009 at 06:01 AM. Reason: to many post new to the this sit
Junior Member
Joined: Jul 2009
Posts: 3
Likes: 0
From: portland,oregon
Car: 1982 pont t/a
Engine: will be 5.7 l98 tpi
Transmission: TH700r4
Axle/Gears: 3.73
Re: Just bought GTA, runs and drives fine, but no power and low shifting
I have a 1989 gta 5.7 l98 I got mine ceap $ 150.00. but when I got mine it ran like crap no power bad shif pont's and when I turn the heater motor on I got were's and it turn out to be a bad ground at the back of the motor on the right siad of the motor mine run's fine now with lt1 inj in it but the body is junk but I have a 1982 pont t/a and is is all going in it should be fun to see and hear 1982 gta and I payed $50.00 for it you all need to see what a 1982 $ 200.00 gta looks like Ha Ha sleeper but very fast and when I get it to gether I will set it up to burn E85 gas and for better gas mile eg may try brown gas IE ( hidrgen gas ) and good luck can never have to many ground's check them make new one's
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