Question about 1989 Chevrolet Suburban

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1989 chevy 3500 4x4 with 454 fuel injection. died on me twice while going downhill.(letting off gas or torque).half tank gas. backfired after stalling. will not start at all. plenty of fuel at throttlebody. has two tanks. used to read left side. after it died now it reads right side? huh? please help me

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  • carhob May 11, 2010

    do u have fuel pressure,do u have spark at plugs?



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I had that problem before check your switch for your tanks .and also you valve under the frame it might be sticking

Posted on Jul 29, 2009


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1989 suburban starts then dies

Then you have a failed fuel pump

Can you hear it run if someone is back there
& you cycle the key on & off

Check fuel pressure with a gauge on engine port

Almost half the people here this week need to
buy a fuel pressure gauge.

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I have a 2000 gmc sonoma when the gas gets below a half tank its hard to start it will also die while ur driving it and it backfires when you try to start it but only when it gets below a half tank

There is a metal chamber that is in the fuel pick up line about 1/2 way up designed to take the pulsation out of the pump.If the o rings are bad or the pump has been changed (some mechanics take the pulsator out and replace it with fuel line but if they didn't use fuel injection line it will only last like a few months.)
Either way sounds like the tank has to come out.

Mar 05, 2012 | 2000 GMC Sonoma Extended Cab

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1989 Ford f150 4x4 6cl When I go to start the truck it will start then I must keep pumping the gas peddle to keep it running if I let off it will die. Even when it is running it runs very rough

Check your fuel pressure to seeif it is high enough. Possible fuel pump or filter which some of those trucks could have up to three fuel pumps, one in each gas tank and a pump along the frame also. Could also be a vacuum leak or a suction leak at the intake or throttle body. Another possibility could be throttle positioning sensor. An easy way to check for a fuel related problem is to lightly spray carb cleaner onto throttle body while trying to start and see if it will continue running on that. If it does then you have a fuel problem. Use carb cleaner safe for fuel injection systems.

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1 Answer

I ahve a 1989 Chevy Suburban and for the past year when the gas gauge reached 3/4 tank I filled up with gas (Regular) and I let the Suburban set up for two moths and I believe the gas went bad. I screwed...

I would first get the fuel filter changed and see what this does
also you may have to get rid of this tank of fuel if the ratio is too bad from the sta bil
you may also want to change the plugs and have the injection system cleaned if this applies if not get some carb cleaner and clean it really good ok and this should get you going like it should
hope this is very helpful for you
best regards michael

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1 Answer

89 chevy beretta gt- surges at idle, backfires and hesitates

Hi! I had the same problem with my 88 2.8 Ltr. Had dirty fuel Injectors. Put in fuel Inj. cleaner in gas tank, after a couple of days, runs like a dream,no more problems. Give it a try. Take care,Leo B.

Jan 03, 2009 | 1989 Chevrolet Beretta

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