Car hard to start sometimes.

WhiteGT · 08-04-2008, 10:19 AM

Hi

I have a 2002 grand prix gt n/a. Sometime when I go to start the car it takes a few turn overs to get going. Occasionally wont start the first time. Sometimes it seems like it has a slight missfire as well. I have installed new plugs, wires, fuel filter, air filter is good. Checked the ohms on the coil packs as well. I have to check the ohm on the injectors still. Any other suggestions?
Thanks.

SyntheticShield · 08-04-2008, 10:40 AM

Have you been able to check the fuel pressure, just in case? It could be a few other things but that would be a good starting point and if that is good we can offer up a few other suggestions.

WhiteGT · 08-04-2008, 08:39 PM

Quote:

Originally Posted by SyntheticShield

Have you been able to check the fuel pressure, just in case? It could be a few other things but that would be a good starting point and if that is good we can offer up a few other suggestions.

Ok thanks, I will put the gauges on sometime this week and get back with the readings.

Sabrewings · 08-04-2008, 08:52 PM

You mean it cranks for a little while longer than usual before it catches? Usually it's the fuel pressure regulator (FPR).

SyntheticShield · 08-04-2008, 10:04 PM

If thats the case just pick up the improved Borg-Sorenson FPR and be done with it. Pull the vacuum line off to the FPR and see if you get fuel coming out. If so its probably bad, but it still could be on the verge even if there is no fuel that comes out.

Sabrewings · 08-04-2008, 10:10 PM

Take the vacuum line off the FPR and smell the hole in the FPR. If you smell gas, it's leaking.

FWIW, mine is leaking and has been for over a year. The only side effect is the few extra turns occasionally on a hot start. Not worth it to replace it yet.

WhiteGT · 08-05-2008, 09:14 PM

Quote:

Originally Posted by Sabrewings

Take the vacuum line off the FPR and smell the hole in the FPR. If you smell gas, it's leaking.

FWIW, mine is leaking and has been for over a year. The only side effect is the few extra turns occasionally on a hot start. Not worth it to replace it yet.

So this wouldn't cause any other issues such as feeling like a slight missfire on the highway or an occasionally slight stuttery idle upon start up?

Sabrewings · 08-05-2008, 09:42 PM

If it's bad enough, it's possible. I haven't seen it personally.

WhiteGT · 08-06-2008, 04:47 PM

Quote:

Originally Posted by Sabrewings

If it's bad enough, it's possible. I haven't seen it personally.

Thanks I will look into it any idea what a new regulator costs? Is it much work to change? I will have to ask at my old job when I get in there this week. I am more familliar with working on the old 3.1L. The 3.8 is new to me, haha.

WhiteGT · 08-12-2008, 10:57 AM

Any ideas on what would cause a slight missfire under load? this is also a problem I am having. it's really only noticible on the highway.

08-04-2008, 10:19 AM	#1
WhiteGT SE Level Member Join Date: May 2008 Location: Ontario Posts: 78 Thanks: 5 Thanked 0 Times in 0 Posts iTrader: (0)	Car hard to start sometimes. Hi I have a 2002 grand prix gt n/a. Sometime when I go to start the car it takes a few turn overs to get going. Occasionally wont start the first time. Sometimes it seems like it has a slight missfire as well. I have installed new plugs, wires, fuel filter, air filter is good. Checked the ohms on the coil packs as well. I have to check the ohm on the injectors still. Any other suggestions? Thanks.

08-04-2008, 10:40 AM	#2
SyntheticShield Administrator Join Date: Dec 2007 Location: Oklahoma Posts: 6,514 Thanks: 14 Thanked 46 Times in 32 Posts iTrader: (5)	Re: Car hard to start sometimes. Have you been able to check the fuel pressure, just in case? It could be a few other things but that would be a good starting point and if that is good we can offer up a few other suggestions. __________________ Scotty Hall Bartlesville, OK 2001 Pontiac Grand Prix GTP It whines a lot, but I like it. The only limitation you will ever face in life is yourself!

08-04-2008, 08:52 PM	#4
Sabrewings GXP Level Member Join Date: Dec 2007 Location: Barksdale AFB, LA Posts: 2,713 Thanks: 8 Thanked 33 Times in 33 Posts iTrader: (0)	Re: Car hard to start sometimes. You mean it cranks for a little while longer than usual before it catches? Usually it's the fuel pressure regulator (FPR). __________________ 2004 Impala LS - got some mods NAIOA Moderator Making you think twice before picking on Impalas

08-04-2008, 10:04 PM	#5
SyntheticShield Administrator Join Date: Dec 2007 Location: Oklahoma Posts: 6,514 Thanks: 14 Thanked 46 Times in 32 Posts iTrader: (5)	Re: Car hard to start sometimes. If thats the case just pick up the improved Borg-Sorenson FPR and be done with it. Pull the vacuum line off to the FPR and see if you get fuel coming out. If so its probably bad, but it still could be on the verge even if there is no fuel that comes out. __________________ Scotty Hall Bartlesville, OK 2001 Pontiac Grand Prix GTP It whines a lot, but I like it. The only limitation you will ever face in life is yourself!

08-04-2008, 10:10 PM	#6
Sabrewings GXP Level Member Join Date: Dec 2007 Location: Barksdale AFB, LA Posts: 2,713 Thanks: 8 Thanked 33 Times in 33 Posts iTrader: (0)	Re: Car hard to start sometimes. Take the vacuum line off the FPR and smell the hole in the FPR. If you smell gas, it's leaking. FWIW, mine is leaking and has been for over a year. The only side effect is the few extra turns occasionally on a hot start. Not worth it to replace it yet. __________________ 2004 Impala LS - got some mods NAIOA Moderator Making you think twice before picking on Impalas

08-05-2008, 09:42 PM	#8
Sabrewings GXP Level Member Join Date: Dec 2007 Location: Barksdale AFB, LA Posts: 2,713 Thanks: 8 Thanked 33 Times in 33 Posts iTrader: (0)	Re: Car hard to start sometimes. If it's bad enough, it's possible. I haven't seen it personally. __________________ 2004 Impala LS - got some mods NAIOA Moderator Making you think twice before picking on Impalas

08-12-2008, 10:57 AM	#10
WhiteGT SE Level Member Join Date: May 2008 Location: Ontario Posts: 78 Thanks: 5 Thanked 0 Times in 0 Posts iTrader: (0)	Re: Car hard to start sometimes. Any ideas on what would cause a slight missfire under load? this is also a problem I am having. it's really only noticible on the highway.

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