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GTA NON-TECH Got a question about non-mechanical items related to your GTA.... whatever they may be? Then post it HERE!

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Old 08-06-2007   #1
Josh
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Help Me Please 1990 GTA is Idling Rough...

Hey everyone...I am sure some of you know of me by my other recent posts...My 1990 GTA I bought over a month ago has just started running a little rough in the last week when I am in park or stopping at an intersection...the rpm is in between 500-700 (usually around 500 though) most of the time when it runs rough in park,etc...so I am wondering what is causing this....to let you know the engine was rebuilt almost 3 (have receipt) years ago by the previous owner so I am sure it isn't any major engine problem I hope...maybe it just needs a tune-up or maybe its because I am running regular gas in my car (should I switch to premium?)...any thoughts or ideas or what I can do to solve this problem because I am no mechanic and if any work is to be done I will have to contact my dad's mechanic or bring it in somewhere....Thanks, Josh
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Old 08-06-2007   #2
Josh
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Re: 1990 GTA is Idling Rough...

I guess I should have posted this in the Tech Section...sorry...Josh
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Old 08-06-2007   #3
FearThisGTA
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GTA Year: 1991
GTA Engine: 350 TPI Automatic
Re: 1990 GTA is Idling Rough...

I just posted some suggestions for you as well.
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Cliff Jones
1991 GTA Trans Am
w/305,231 miles
on the original motor!!!!
Time of Death on motor, 4:07pm on 05/29/2010.
Hp:211.2@4200rpms/Tq.328.5@2700rpms
Best et: 13.959@97.05mph
Best mph: 98.3
Best 60' : 1.875 on BFG Comp TA's w/ 32 lbs of air in them
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