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i have a 2000 gmc jimmy with a 4.3 vortec engine that was ...

Sent to Car Experts February 04 10:37 a.m.

i have a 2000 gmc jimmy with a 4.3 vortec engine that was losing power when i drive it i would stutter lose power for a second and then come right back this seems to happen once a year more often when it is damp and cold out and now it won''t start at all it will turn over but it won''t catch to start i have replaced the fuel pump 2 years ago the fuel filter, spark plug wires, and distributer cap last year and i did get a service engine soon light last time it did this and it said that i had a multi cylinder miss fire

Optional Information:
2000 GMC jimmy 4.3 vortec

Already Tried:
fuel pump 2 years ago plugs wires distributor cap and fuel filter last year

Customer (name blocked for privacy)

Status: Closed Value: $9

Answer
February 04 11:02 a.m. (24 minutes and 22 seconds later)

ACCEPTED

Hello Shane Phillip, If it wont start now, you should start checking the basics . Test for fuel pressure, if you have a gage. If not, listen for the sound of the pump turning on for a few seconds when you turn the key on. If no sound, have a helper try to start the engine while the bottom of the fuel tank is hit with a block of wood, sometimes it gets the pump to work if stuck. You could also give the engine a short spray of starting fluid into the air intake, if it attemps to run you will know you have a fuel problem. If it doesn't do anything start checking the ignition, you can have a problem with the cap and rotor. The caps have been a known problem on these engines.We have had repeat problems with fuel pumps and dist. caps and rotors, some only lasting a year. We have had the best luck using AC Delco replacement parts.

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