1996 Chevy Suburban 1996 Chevy Suburban Cranks but does not

TIQTYPHOON

MEMBER
1996 CHEVROLET SUBURBAN
V8
4WD
AUTOMATIC
210,000 MILES

It is a sudden problem, never had a problem with it. This morning it cranks but does not start. I sprayed carb cleaner into the throat of the intake and it start right up, but if I turn off the engine it fails to start again. I have to do this over again. Once its running, it accelerates fine and idle is fine. I have an OBD scanner and no trouble codes

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Check fuel pressure if okay test the fuel pump relay and oil pressure sending unit

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Thursday, April 23rd, 2009 AT 9:08 PM

TIQTYPHOON

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3 POSTS

I replaced the fuel pump relay, and having the fuel pressure test done, also a diagnostic.

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Friday, April 24th, 2009 AT 1:43 PM

RASMATAZ

MECHANIC
75,992 POSTS

I replaced the fuel pump relay, and having the fuel pressure test done, also a diagnostic. So what's happening now?

What was the fuel pressure? The pressure should be 60-66psi. Are you getting injection pulses while cranking it over

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Friday, April 24th, 2009 AT 4:31 PM

TIQTYPHOON

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3 POSTS

UPDATE:
Had is checked out by a pretty good auto shop. The problem was a weak fuel pump, and I saw from doing a fuel pressure test. They replaced the fuel pump and it was back to starting up, if not running better, than before.

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Wednesday, April 29th, 2009 AT 6:00 AM