98 Jimmy. Replaced the intake gasket and it now starts hard. At first
I thought the timing was off so I rechecked the distributator and it
is right on. After it starts it runs great only thing is getting it
started. It sounds like a back fire and like it is out of time but
like I said I check that.
I got a code for TPS and lean both banks. I change the TPS and that
code has not come back up. I wonder if it could be plugs and wires
making it hard to start and not enough spark and thus I am getting a
gas build up in the cylinders.
Any other ideas.
The distributor has nothing to do with ignition timing.
1) Fuel pressure
spec is 60-66 PSI
That means you should have no less than 66 PSI KOEO, no less than 60 PSI
2) Clogged injectors
(likely if you allowed the fuel to drain out of the injector assembly
when you replaced the gaskets).
3) Distributor cap and rotor have to be Delco, no/none/zip/zilch/zero
aftermarket brands work on this application
Crankshaft position sensor is not in the distributor. It is located in
the front timing cover under the crankshaft.
The CAMshaft position sensor is in the distributor. However if the
engine starts and runs and doesn't set a cam code then it is VERY close
to correct. If it is off by one tooth either way you WILL set a cam code.
The 0452 code could be a bad tank sensor or a problem in the wiring. Not
hard to test BUT the sensor is a PIA to get to with the tank installed.
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