Jan 28th, 16, 03:21 AM
Join Date: Sep 2000
Location: Va Beach VA
Re: 96 z28 trouble when starting up.
On start-up, you might turn the ign sw to RUN and leave it there for about 3-4 seconds, then crank engine over.
This procedure, as i have learned, primes the fuel system, for a quicker start.
It also is troubleshooting tip for a leaky check valve in the fuel pump or leaky injector.
One would have to use a fuel pressure gauge and record pressures at start, run, and a couple hours after shutdown. No or lower pressure at shut down, leak.
There is a procedure in setting base timing and base idle rpm.
These two should be done before any troubleshooting/repairs happen.
You might remove the IAC and clean out the orifice and surrounding area.
Then reset base idle correctly.
You might get a Haynes manual and read up. Better than nothing.
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