1995 Chevy Suburban Sputters

5 messages, Last post on Feb 19, 2009 at 5:14 AM

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What is this discussion about? Chevrolet Suburban, Fuel System, SUV

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#4 of 5 Re: 1995 Chevy Suburban Sputters [freddy0872] by kiawah Feb 19, 2009 (4:23 am)
Replying to: freddy0872 (Feb 18, 2009 3:29 pm) I'm only going by your error code clue of low voltage at the pump. I had a '96 350 engine, but never had any fuel issues at all. I'm on the road, so don't have access to my old factory manuals. I don't even know that there is a relay in the circuit, but many vehicles have relays so suggested you could look in that area. I'm taking a stab in the dark, and suggesting to get yourself a set of electrical schematics, and check how power is controlled and delivered to the fuel pump. Within a relay, the points of the secondaries can electrically arc and pit, in which case they cause a resistance effectively dropping the voltage supplied out to the pump. Your symptoms sound like fuel starvation, which would normally suggest a fuel pump, but you've already replaced that. Is there a fuel filter on that model which might be clogged? Replies to this message: freddy0872 (Feb 19, 2009 5:14 am)
#5 of 5 Re: 1995 Chevy Suburban Sputters [kiawah] by freddy0872 Feb 19, 2009 (5:14 am)
Replying to: kiawah (Feb 19, 2009 4:23 am) Yes there is a fuel filter and i have replaced it a maybe a year or so ago when i started noticing this issue. Im going to go and print out the wiring diagrams and check to see what exactly is going on. Thank you very much! Ive gotten alot more help on here than i got going into Auto Zone or somewhere like that! Thanks Fred S.

#4 of 5: Re: 1995 Chevy Suburban Sputters [freddy0872] by kiawah; Feb 19, 2009 (4:23 am)

Replying to: freddy0872 (Feb 18, 2009 3:29 pm)

I'm only going by your error code clue of low voltage at the pump. I had a '96 350 engine, but never had any fuel issues at all. I'm on the road, so don't have access to my old factory manuals. I don't even know that there is a relay in the circuit, but many vehicles have relays so suggested you could look in that area. I'm taking a stab in the dark, and suggesting to get yourself a set of electrical schematics, and check how power is controlled and delivered to the fuel pump.

Within a relay, the points of the secondaries can electrically arc and pit, in which case they cause a resistance effectively dropping the voltage supplied out to the pump.

Your symptoms sound like fuel starvation, which would normally suggest a fuel pump, but you've already replaced that. Is there a fuel filter on that model which might be clogged?

freddy0872 (Feb 19, 2009 5:14 am)

#5 of 5: Re: 1995 Chevy Suburban Sputters [kiawah] by freddy0872; Feb 19, 2009 (5:14 am)

Replying to: kiawah (Feb 19, 2009 4:23 am)

Yes there is a fuel filter and i have replaced it a maybe a year or so ago when i started noticing this issue. Im going to go and print out the wiring diagrams and check to see what exactly is going on. Thank you very much! Ive gotten alot more help on here than i got going into Auto Zone or somewhere like that!
Thanks

Fred S.