Leaning Out?

Phantom5oh · 06-26-2002, 01:45 PM

Lately my 95 GT has been starting kind of hard. When its cold and I try to start it, it doesn't fire on the first try. I have to crank it a few times before it will catch. Its been doing it for a few weeks. Then last week after I reved it, it hiccuped out the exhaust. Not full blown back-fires, but little coughs/hiccups. Then yesterday I nailed it on the highway to pass a semi and it started to ping/detonate. To me that sounds like its running lean.

The car is stock, stock timing, stock exhuast, stock everything but I only run the good gas in it, 93 octane. My check engine light hasn't come on and I can't seem to pull any codes from it. Anyone have any ideas what it could be or where I should start looking?

explicitone · 06-26-2002, 01:53 PM

check the fuel filter it maybe clogged or clogging? it also could be dirty fuel injectors . it might be a bad regulator ? itcan be that the pump is on its why out or the pump screen is getting clogged. thats all I can think of ....

PKRWUD · 06-26-2002, 04:57 PM

You really need to get a pressure tester and check your fuel pressure. it definately sounds like a problem in the delivery of fuel to the engine.

Take care,
-Chris

Phantom5oh · 06-27-2002, 07:12 AM

Chris,

Will I need to get a special tester since I am dealig with fuel?

Steve

PKRWUD · 06-27-2002, 06:46 PM

Sears: $25
Fuel Injection Fuel Pressure Tester

It's a guage with fittings that attaches to the schrader valve, and allows you to test your pressure under various conditions, as well as see how fast it bleeds down, and where it's bleeding down.

Take care,
-Chris

fiveohpatrol · 06-28-2002, 01:15 AM

Sounds exactly like the problem I was having a while back when my fuel pump went south on me. Do you hear it prime when you turn the key to on, just before you start it? Incase you are unaware what it sounds like, its a whine noise that comes from the rear of the car. Listen for it, and if you dont hear it then the pump is bad. They are not very expensive and are fairly easy to install.

good luck with it,
-Drew

Phantom5oh · 06-28-2002, 07:22 AM

Yeah, it primes. The trick I have been trying is to let it fully prime and kick off before I start the car. It seems to work, but I can't tell, because sometimes I forget and it starts fine. Then other times it takes 2 or 3 turns of the key even if I let it prime.

What made me think I had a problem was when I drove my brother 94 GT (the one in my profile) and that thing starts the instant you turn the key.

I am going to get the tester from Sears this weekend and see what I can find out.

Steve

06-26-2002, 01:45 PM	#1
Phantom5oh Registered Member Join Date: Mar 2000 Location: Boston, MA Posts: 334	Leaning Out? Lately my 95 GT has been starting kind of hard. When its cold and I try to start it, it doesn't fire on the first try. I have to crank it a few times before it will catch. Its been doing it for a few weeks. Then last week after I reved it, it hiccuped out the exhaust. Not full blown back-fires, but little coughs/hiccups. Then yesterday I nailed it on the highway to pass a semi and it started to ping/detonate. To me that sounds like its running lean. The car is stock, stock timing, stock exhuast, stock everything but I only run the good gas in it, 93 octane. My check engine light hasn't come on and I can't seem to pull any codes from it. Anyone have any ideas what it could be or where I should start looking? __________________ 95 GTS 03 DR 650SE Sgarzi's Machine Works

06-26-2002, 01:53 PM	#2
explicitone Registered Member Join Date: Apr 2002 Location: racine ,wi Posts: 691	check the fuel filter it maybe clogged or clogging? it also could be dirty fuel injectors . it might be a bad regulator ? itcan be that the pump is on its why out or the pump screen is getting clogged. thats all I can think of .... __________________ RUN IT STAIGHT AND RUN IT HARD ________ Novi 2000 60' 1.46 1/4 10.67 mph 126.5 _________

06-26-2002, 04:57 PM	#3
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You really need to get a pressure tester and check your fuel pressure. it definately sounds like a problem in the delivery of fuel to the engine. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-27-2002, 07:12 AM	#4
Phantom5oh Registered Member Join Date: Mar 2000 Location: Boston, MA Posts: 334	Chris, Will I need to get a special tester since I am dealig with fuel? Steve __________________ 95 GTS 03 DR 650SE Sgarzi's Machine Works

06-27-2002, 06:46 PM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Sears: $25 Fuel Injection Fuel Pressure Tester It's a guage with fittings that attaches to the schrader valve, and allows you to test your pressure under various conditions, as well as see how fast it bleeds down, and where it's bleeding down. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-28-2002, 01:15 AM	#6
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	Sounds exactly like the problem I was having a while back when my fuel pump went south on me. Do you hear it prime when you turn the key to on, just before you start it? Incase you are unaware what it sounds like, its a whine noise that comes from the rear of the car. Listen for it, and if you dont hear it then the pump is bad. They are not very expensive and are fairly easy to install. good luck with it, -Drew __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

06-28-2002, 07:22 AM	#7
Phantom5oh Registered Member Join Date: Mar 2000 Location: Boston, MA Posts: 334	Yeah, it primes. The trick I have been trying is to let it fully prime and kick off before I start the car. It seems to work, but I can't tell, because sometimes I forget and it starts fine. Then other times it takes 2 or 3 turns of the key even if I let it prime. What made me think I had a problem was when I drove my brother 94 GT (the one in my profile) and that thing starts the instant you turn the key. I am going to get the tester from Sears this weekend and see what I can find out. Steve __________________ 95 GTS 03 DR 650SE Sgarzi's Machine Works

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