I have a 2003 Chevy Blazer 4x4 4.3 V6. Over a period of a few months, the truck is becoming successively more difficult to start - it acts as if it's not getting gas right away.
It's been checked at the local mechanic and the usual recommendations have been suggested (most which were already done)
It's had (recently) new plugs, wires, fuel filter, and thermostat (mechanic assured us it was faulty, so at <$15, I replaced)
The engine turns over just fine, so I don't anticipate any starter/battery/charger issues. However, it takes several rotations before the engine will fire.
Once it's running, there's no bogging, hesitation, or apparent loss of power? Also, restarts after short periods of being off do not show the same symptoms.
I know the fuel pump is supposed to run for 1-2 secs before actual turn over? I don't expect any pump issues, though, as it has no problem once started.
ANY thoughts? Thanks in advance!
One additional note. The catalytic converter HAS gone out on this and has not yet been replaced - could this cause the issue (due to incorrect sensor reading on the exhaust side?)
Also looked into adjusting timing to find it self-adjusts. My only other thoughts are possibly PCV valve or oxygen sensor (no codes thrown though), or fuel injectors (the entire assembly would have to be replaced.)
Also, what is a good product to run through the tank to clean the injectors / fuel line?
Thursday, September 10th, 2020 AT 12:38 PM