hey guys my friend is offering me his 1995 GTP for 1400 bucks.
it looks almost mint on the exterior the interior needs a little shampooing but no major tears or any significant damage for that part.

it has trouble idleing when it sets for a while. and it smells as if its running rich.
would these two factors be coincidence or would they both be a contributing factor.

what would you look at first to solve the idle issue. ( it has NEW plugs)

ehh how many miles and how well was the engine taken care of...those 3.4s are very picky about some maintenance musts

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SIG IN PROGRESS
1996 Pontiac Grand Prix SE
G8 GT Sport Package

not very sure of the how well it was maintained. he bough it last year and it seems to be a pretty strong car. it has around 150k i think

Timing belts are recommend to be changed near 100k....maybe it has been..maybe not..if it hasnt been replaced and gives out soon..say bye bye to your valvetrain

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SIG IN PROGRESS
1996 Pontiac Grand Prix SE
G8 GT Sport Package

so you think that could cause its restriction to idle? it starts just fine and then dies, over and over then give it a lil gas to let it warm or something to that nature and she is just fine.

LQ1's are non-interference motors. If the timing belt snaps only way valves will kiss the pistons would be if you were near redline.

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most likely no..
any ses light?
good places to start trouble shooting would be emissions system for example pcv valve,vacuum leaks fuel regulator etc
also search here for a seafoam write up to preform treatment through a vacuum line...I would recomend starting with that

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SIG IN PROGRESS
1996 Pontiac Grand Prix SE
G8 GT Sport Package

awesome thanks for the great replies

You might be right..I was always leary of buying said engine

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SIG IN PROGRESS
1996 Pontiac Grand Prix SE
G8 GT Sport Package

They are very finicky motors. If you do proper maintenance on them they will be fine, but how many people with Grand Prix's actually do that?

Nevermind that doing the timing belt on them can be a total bitch from what I've heard. I know to have it done you can expect to pay $1200+

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one thing pretty simple you could try is taking the throttle body of and cleaning it out really well with some TB cleaner. I have the 3.4 version, and it made a world of difference for me.

Wrong 3.4 though. The one in the GTP's is the DOHC 3.4, not pushrod one. Just giving you a hard time.
However, cleaning the TB, IAC and all that jazz could help out indeed.
If it's having trouble holding idle after it's warm, then it could be an 02 or MAF sensor, but if it's having trouble holding idle at first start then it's probably not either of those 2 things.
I'm not really familiar with the LQ1, sorry.

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

I'm not entirely familiar with the LQWin, but idle issues make me think vacuum leak. If that doesn't work IIRC ICM's are the same from the LQ1 to the 3100/3800's, you could try swapping it and the coils. Cleaning TB and IAC are also good ideas.

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^^2x. Totally forgot about vacuum leaks. Cheap is always a good place to start

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

good catch matt, same thing though to recommend. Then again though, i thought we didn't know anything about cars?

Haha, truth. The oldest person in this thread is 21 (unless the OP is older) so we don't know anything

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Dubs:00 VW GTI VR6, Low and Slow 91 VW GTI 8v, Shave the Bay!! 91 VW Cabriolet 8v, bitch Basket
GP's:04 GP GT, Past now G-Ma's Girlfriend's 97 GP GT, "Project Pink Power"

Not anymore.

Oh, wait, I'm still under 30. My bad. lol

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2012 Ford Focus SE Sport
2012 MINI Cooper Clubman

I have ADHD and drive a Focus. Ironically.
Although gold dust is precious, when it gets in your eyes, it obstructs your vision.

Check the fuel filter as well. I can't tell you how many people have overlooked something like that. But vacuum leak is definitely a real possibility (and probably more likely). Just wanna cover all bases though. And I'm older than 21 (Mike still has me beat though)

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98 GTP (RIP 11-5-09); 73 Z28 Camaro (350, TKO 600);01 Monte Carlo SS (L36, L67/L32 hybrid in the future)
"Death smiles at us all; all a man can do is smile back"