Having a lot of luck with the search function finding fuel pressure, but not on what the recommended fuel pressure is.
1997 DeVille.
Fuel pressure at idle is 42psi. Take the vac line off the regulator, it will sit at 42, then sparadically go up then down, then up to 50psi. On my other car, once you disconnected the line, FP would shoot up immediately. There was no fuel dripping out of the vacuum line or regulator. Who knows when the filter was last changed, so that's getting torn into when I get off work tonight.
This seems like it could be in the ballpark, but I am not quite sure without being able to get to the library to check AllData (which is closed on Sunday...grrr)
Also, I removed the FP relay with it running and the car died. According to this thread, it should have acted like a lot of other GMs and kept running (voltage fed through the oil pressure switch or sending unit, depending on the setup). http://www.cadillacforums.com/forums/showthread.php?t=47288&highlight=fuel+pressure
Why am I wondering?
The car runs and drives perfectly...I have only had it for 2 weeks and have put about 400 miles on it. Three times now, it has died out of the clear blue (electrical accessories still work). They were under 40 mph situations comming up to a stop. No problem starting it up again. Then a fourth time (which got me thinking it was fuel related) was when I started accelerating from a stop and the RPMs would not go over 2000rpm. It was like a rev limiter, and mashing down on the gas caused the Caddy to backfire through the intake. It ran like this for a minute. I pulled over and shut it off, waited 20 seconds, and started it up again. It has run perfectly since then. If the ignition module got hot, it would have taken much longer than 20 seconds for it to cool down. That time really ticked me off because it didn't throw ANY codes, even though I got it to backfire and I figured a half dozen misfire codes would show up.
Only code was P1599 or 1559, whichever meant engine stall or near stall detected.
If FP is normal, I guess my next shot is going to be looking at the troubleshooting charts on crank sensors.
TIA.
1997 DeVille.
Fuel pressure at idle is 42psi. Take the vac line off the regulator, it will sit at 42, then sparadically go up then down, then up to 50psi. On my other car, once you disconnected the line, FP would shoot up immediately. There was no fuel dripping out of the vacuum line or regulator. Who knows when the filter was last changed, so that's getting torn into when I get off work tonight.
This seems like it could be in the ballpark, but I am not quite sure without being able to get to the library to check AllData (which is closed on Sunday...grrr)
Also, I removed the FP relay with it running and the car died. According to this thread, it should have acted like a lot of other GMs and kept running (voltage fed through the oil pressure switch or sending unit, depending on the setup). http://www.cadillacforums.com/forums/showthread.php?t=47288&highlight=fuel+pressure
Why am I wondering?
The car runs and drives perfectly...I have only had it for 2 weeks and have put about 400 miles on it. Three times now, it has died out of the clear blue (electrical accessories still work). They were under 40 mph situations comming up to a stop. No problem starting it up again. Then a fourth time (which got me thinking it was fuel related) was when I started accelerating from a stop and the RPMs would not go over 2000rpm. It was like a rev limiter, and mashing down on the gas caused the Caddy to backfire through the intake. It ran like this for a minute. I pulled over and shut it off, waited 20 seconds, and started it up again. It has run perfectly since then. If the ignition module got hot, it would have taken much longer than 20 seconds for it to cool down. That time really ticked me off because it didn't throw ANY codes, even though I got it to backfire and I figured a half dozen misfire codes would show up.
Only code was P1599 or 1559, whichever meant engine stall or near stall detected.
If FP is normal, I guess my next shot is going to be looking at the troubleshooting charts on crank sensors.
TIA.