Supercharged111
Truly Awesome
- Joined
- Aug 20, 2015
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No, the truck will idle around 15-20 degrees BTDC.
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I did a fuel pressure check at the rail. Clamped off return line and it read above 90 psi with key on. Bad regulator?
I followed the service manual procedure. Said to shut off return line and recheck pressure. If above specified amount (55-65 psi) regulator is bad. I got over 90 psi. I’ve replaced the regulator awhile back so I’m skeptical it’s bad.
From what I gather the spring inside the regulator is controlled by vacuum. At idle you have vacuum which opens the flow to return line. Under load there’s no vacuum, return is closed and pressure should be slightly higher. After cycling the key without starting, I get 62ish psi then it drops back to zero almost immediately after the key is turned off. Regulator should be closed as no vacuum is present with key on. Am I crazy or on to something here? I realize my issue started with my distributor blowout but the truck wasn’t running too great leading up to it. Idled okay but strange things like almost stalling coming to a hard stop when cold, harder starts (never started great to begin with) and lacking power.