Quote:
Originally Posted by j cAT
with this no DTC found the usual component is the ECT. when this reports the wrong engine temp it will cause the fuel mixture to be incorrect . 10 years of use they get out of proper cal.
what was the fuel pressure results before and after the part replacements. also check for pressure drop on key on engine off test. should hold for a few minutes or drop very little.
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Well, I never checked fuel pressure before I made the replacement because I knew the regulator was bad because I had fuel in the vacuum line. Also, I knew the fuel pump was going out because I had to whack the tank sometimes to get the fuel pump to kick on!
After I replaced everything, fuel pressure with the key on, engine off would be around 65 psi. When I started it up, the pressure was hovering just under 55 psi. I checked the fuel pressure again this morning and the readings were similar (right around 65 psi with key on, engine off and right at 55 psi with the engine running). And it started right up no problem.
I will probably go ahead and replace the ECT sensor. The truck does have almost 200,000 miles on it so I would say that it is probably the issue. Plus, it seems to be a relatively inexpensive part.
I'll keep you updated. Thanks a lot!