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'97 Chevy 1500 fuel pump related issues
09-22-2014, 09:20 PM
Post: #1
'97 Chevy 1500 fuel pump related issues
My fuel pump went bad the other day on the freeway. I struggled to drive it about 2 miles to an onramp.It backfired lightly a couple times on the way. The 'service engine soon' light was on, and when I turned it off it wouldn't restart, and had to have it towed home.

Today I had a mechanic change the fuel pump for me.When I got back into it the service engine soon light was still on, and it had a wicked vibration it never had before. They plugged in the probe and it said "cylinder misfire" and he said he would fix it for 300$ I dont have the money so I drove it home and by then the service engine light was flashing. I changed the spark plugs and that helped a little but the light is still flashing.

Do you have any suggestions what I might check to try to fix this?
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09-22-2014, 10:37 PM (This post was last modified: 09-22-2014 10:38 PM by Rupe.)
Post: #2
RE: '97 Chevy 1500 fuel pump related issues
It would help if we knew which engine was in there and had the exact trouble code. It may also help if you told us what he was going to fix for $300.

Typically the flashing light means the engine is skipping (running rough) enough to cause damage to the cat converter. IOW, unburned fuel is in the exhaust. The ECM will have codes in storage for multiple cyl misfire (po300) or single cyl misfire with the bad ones identified by their own code. If it's been a long time since the last tune you can shoot from the hip with a full tune then see what happens or you can clear the old codes then drive it long enough to set a fresh code and see exactly what's wrong. The last option is probably the money saver if things are tight.
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