Check air filter and housing to see if airflow is obstructed.
Check Throttle positioning sensor, replace as needed.
Check plug wires, replace as needed.
SOURCE: 2001 cavalier barely starts,sometimes runs
Three things.
First, you need to check the MAF sensor for contamination.
Second, check fuel pressure, if you dont have a gauge, autozone and Advance have them on their tool loaner program.
Should see 35-40 psi with key on engine off, cycle key a few times, if it takes a while to build up, replace filter and retest.
Third, possible convertor blockage, easiest check is to remove the 02 sensor and try to start with the hole open, if it runs, then that is it, specs allow for 2-3 lbs of back pressure max. That means if you can hear pressure escaping, it is a problem area.
SOURCE: 2000 chevy silverado 1500 4.3 eng
Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.
SOURCE: 1997 chevy silverado 1500 350 vortech, new fule pump not working
before you drop tank again, check fuses & relay.then disconnect fuel line @ filter turn key to on position should hear fuel pump run and get gas stream out of line. if no flow from line new pump faulty be sure & remove negative battery cable first good luck.
SOURCE: 94 s10 blazer dies when put into gear
Sounds like a vacuam leak, best thing to use is cold start spray, by spraying the vacuam lines with this you will notice a change in the idle wherever the leak is at.
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today I replaced throttle position sensor and distributor cap and rotor and still doing the same thing
today I put a fuel pressure regulator on the tbi and still getting the same result.
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