car wont start sometimes,had to cycle key

8

89llx

5 Year Member

Aug 31, 2009

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Feb 23, 2011

#1

• Feb 23, 2011

• #1

I have a 95 gt sometimes it wont start, I checked fuel pressure and it was low ,so cycling key did pull up the fuel pressure to 38, on my gauge, so is my fuel pump bad?

thanks

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Feb 24, 2011

#2

• Feb 24, 2011

• #2

Does it crank when it won't start?

When you don't cycle the key and it won't start,
if you cycle the key, does it start immediately?

 

8

89llx

5 Year Member

Aug 31, 2009

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Feb 24, 2011

#3

• Feb 24, 2011

• #3

HISSIN50 said:

Does it crank when it won't start?

When you don't cycle the key and it won't start,
if you cycle the key, does it start immediately?

Click to expand...

yes, it cranks, I put a pressure gauge on the fuel rail and when I first hit the key I get 20 pounds of fuel press, after I cycle the key it will go up to 38 pounds, yes cycle the key fires it up


thank you soooo much!

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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Feb 24, 2011

#4

• Feb 24, 2011

• #4

If you have fuel line crimping pliers, you can try to ascertain where the issue is. The most likely sources are a weak check valve or the FPR.

Otherwise, you could prime it a couple of times before trying to start it or let it crank for a couple of extra seconds while it builds pressure.

 

9

94gt5.o

New Member

Dec 27, 2009

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ferndale WA

Feb 24, 2011

#5

• Feb 24, 2011

• #5

But also could be a bad fuel filter maybe. Does your fuel pump whine real bad?

 

8

89llx

5 Year Member

Aug 31, 2009

302

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Feb 24, 2011

#6

• Feb 24, 2011

• #6

94gt5.o said:

But also could be a bad fuel filter maybe. Does your fuel pump whine real bad?

Click to expand...

no it does not whine,too much- but the filter is an idea too

 

RIO5.0

15 Year Member

Feb 16, 2001

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N.H.

Feb 24, 2011

#7

• Feb 24, 2011

• #7

Odds are it's the pump...super common on these cars. A new pump will cure it for awhile, then it starts all over again...been there. Everytime it builds 38 psi or so it'll lite right off, anything less it cranks...I use my fuel pressure gage on the cowl and can see it.

Its a pain to change and letting it crank is a drag to boot....use the 3 time key on trick til you feel like getting at it. Mine did it for years...it's more aggravating than anything else....specially if your in front of a bunch of Chevy guys and it just cranks.....

 

J

Jaffman088

New Member

Sep 28, 2010

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Mar 1, 2011

#8

• Mar 1, 2011

• #8

Sometimes my 94 fires right up, and others i have to crank it a little bit, or even a few times. I can definitely hear my fuel pump whine pretty good while driving. I also feel that it lags sometimes. Also, do not have a pressure regulator. Could that be a pump issue?

 

revhead347

Apparently my ex-husband made that mistake.

20+ Year Stangneter

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Mar 2, 2011

#9

• Mar 2, 2011

• #9

How much gas do you have in your tank. Fuel pumps only fail when the tank is slap ass full.

Kurt

 

9

94gt5.o

New Member

Dec 27, 2009

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ferndale WA

Mar 2, 2011

#10

• Mar 2, 2011

• #10

how so id like to know.

 

toyman

10 Year Member

Jul 19, 2007

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Vernon BC

Mar 2, 2011

#11

• Mar 2, 2011

• #11

Jaffman088 said:

Sometimes my 94 fires right up, and others i have to crank it a little bit, or even a few times. I can definitely hear my fuel pump whine pretty good while driving. I also feel that it lags sometimes. Also, do not have a pressure regulator. Could that be a pump issue?

Click to expand...

Be assured you have a FPR if not aftermarket then the OEM unit.

 

revhead347

Apparently my ex-husband made that mistake.

20+ Year Stangneter

Jun 14, 2004

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Acworth, GA

Mar 3, 2011

#12

• Mar 3, 2011

• #12

94gt5.o said:

how so id like to know.

Click to expand...

Murphy's law. It only fails when it's full, so that you have to drop a full fuel tank to change it out.

Kurt