Having fuel problems

mjacobs321 · June 24th, 2010, 09:02 PM

Been having some weird stall outs when the car is idling. when im driving it will bogg down badly and it will sputter then back to normal. im almost positive its a fuel problem. just lookin for some advice before i start replacing things.

OHC230 · June 25th, 2010, 01:15 AM

Have you checked the fuel pressure?

What do the spark plugs look like?

Has the car had a recent tune up?

Can you hear a hissing noise coming from the engine, while its running?

mjacobs321 · June 25th, 2010, 08:13 PM

probably needs a good tune up

no hissing unless you mean the fuel pump which u can hear running

im thinkin its in need of a tune up and maybe a fuel filter just not sure

OHC230 · June 27th, 2010, 10:18 AM

I would start with the tune-up parts, since it sounds like you were going to do that anyway. I would definitely change the plug wires as well as the plugs. The color of the plugs can tell a story here. If they are black in color, that could indicate a rich running condition or possibly oil fouling. If they are light tan in color, that could indicate a lean condition.

mjacobs321 · June 28th, 2010, 06:36 PM

the plugs where white
i changed the plugs, the wires, cap n rotor, fuel filter and air filter. running better but it will still stall out and sputter.
running out of ideas i can try cleanin the fuel injectors just no sure what to use

mjacobs321 · June 30th, 2010, 06:34 PM

still having the problems..... any ideas?

OHC230 · June 30th, 2010, 10:28 PM

If your plugs are white,it could indicate a lean condition. Check your fuel pressure next. It should be around 45 LBS. Dirty injectors are less likely.

mjacobs321 · July 10th, 2010, 04:26 PM

i still cant figure this thing out
could it be the fuel pressure regulator?

OHC230 · July 10th, 2010, 10:39 PM

Yes, it could be the fuel pressure regulator, or the O2 sensor or the coolant temp sensor, or a bad fuel pump, or a couple of other things.

I need a little more info, in order to help you.

Have you checked the fuel pressure? how many lbs?

Does it have a miss at idle?

Try starting the engine, let it warm up and while it is running, pull one fuel injector plug from an injector at a time and see if the idle becomes more rough or stays the same. This can tell you if you have a dead cylinder or a bad injector.

BTW Have you checked the fuel pressure?

Doing this, can help solve some of this mystery.

June 24th, 2010, 09:02 PM	#1
mjacobs321 Newbie Join Date: Jun 2010 Posts: 10 iTrader: 0 reviews	Having fuel problems Been having some weird stall outs when the car is idling. when im driving it will bogg down badly and it will sputter then back to normal. im almost positive its a fuel problem. just lookin for some advice before i start replacing things.

June 25th, 2010, 01:15 AM	#2
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 875 iTrader: 0 reviews	Have you checked the fuel pressure? What do the spark plugs look like? Has the car had a recent tune up? Can you hear a hissing noise coming from the engine, while its running? __________________ Supercharged 2.7L 398 HP 501 ft lb !!

June 27th, 2010, 10:18 AM	#4
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 875 iTrader: 0 reviews	I would start with the tune-up parts, since it sounds like you were going to do that anyway. I would definitely change the plug wires as well as the plugs. The color of the plugs can tell a story here. If they are black in color, that could indicate a rich running condition or possibly oil fouling. If they are light tan in color, that could indicate a lean condition. __________________ Supercharged 2.7L 398 HP 501 ft lb !!

June 30th, 2010, 10:28 PM	#7
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 875 iTrader: 0 reviews	If your plugs are white,it could indicate a lean condition. Check your fuel pressure next. It should be around 45 LBS. Dirty injectors are less likely. __________________ Supercharged 2.7L 398 HP 501 ft lb !!

July 10th, 2010, 10:39 PM	#9
OHC230 Enthusiast Supercharged 89'/ 85' SVO 11.945 @ 119.6 Join Date: Jan 2010 Location: Napa Valley CA Posts: 875 iTrader: 0 reviews	Yes, it could be the fuel pressure regulator, or the O2 sensor or the coolant temp sensor, or a bad fuel pump, or a couple of other things. I need a little more info, in order to help you. Have you checked the fuel pressure? how many lbs? Does it have a miss at idle? Try starting the engine, let it warm up and while it is running, pull one fuel injector plug from an injector at a time and see if the idle becomes more rough or stays the same. This can tell you if you have a dead cylinder or a bad injector. BTW Have you checked the fuel pressure? Doing this, can help solve some of this mystery. __________________ Supercharged 2.7L 398 HP 501 ft lb !!

June 25th, 2010, 08:13 PM	#3
mjacobs321 Newbie Join Date: Jun 2010 Posts: 10 iTrader: 0 reviews	probably needs a good tune up no hissing unless you mean the fuel pump which u can hear running im thinkin its in need of a tune up and maybe a fuel filter just not sure

June 28th, 2010, 06:36 PM	#5
mjacobs321 Newbie Join Date: Jun 2010 Posts: 10 iTrader: 0 reviews	the plugs where white i changed the plugs, the wires, cap n rotor, fuel filter and air filter. running better but it will still stall out and sputter. running out of ideas i can try cleanin the fuel injectors just no sure what to use

June 30th, 2010, 06:34 PM	#6
mjacobs321 Newbie Join Date: Jun 2010 Posts: 10 iTrader: 0 reviews	still having the problems..... any ideas?

July 10th, 2010, 04:26 PM	#8
mjacobs321 Newbie Join Date: Jun 2010 Posts: 10 iTrader: 0 reviews	i still cant figure this thing out could it be the fuel pressure regulator?

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