Quote:
Originally Posted by old_master
From the underside of the distributor housing, it looks like part of the casting. If you remove the cap you can see the screen, it's about 1/4" in diameter. I usually just run a drill bit down through it...all gone!.
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I thought I looked it over pretty good, but will definately go back and take another look.
Quote:
Originally Posted by old_master
You might want to connect a fuel pressure gauge to the service port and watch it when the engine quits. GM doesn't publish any engine running fuel pressure specs for this engine but, it's usually around 57psi while cruising, lower when decellerating, higher when accelerating. The poppet valves need right around 40psi to squirt fuel and when it drops below that, it can act very much like an electrical failure, very "digital". Key on, engine off, fuel pump running, pressure must be 60psi to 66psi and must remain above 55psi for 3 to 5 minutes after the fuel pump shuts off.
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I have been running it with a gauge hooked up and the pressures are right on target with your values. I also have a voltmeter semi-permanently attached to the primary of the coil so I can compare the base line values captured under various operating conditions to when (if) it fails again. My thought is to work back through the ICM to the VCM if no voltage at the coil primary at time of failure -- assuming the fuel pressure is good at the time. What is the probability of an intermittent problem with the fuel pump on this vehicle? Also, I changed the fuel filter before installing the new spider assembly.
It made the round trip to work today without incident. Went out lunch time and ran it for awhile too and it hasn't missed a beat. Sure hard to fix when its working.
Thanks again!