Slight Hesitating Issue!?!?!
#21
If the car's idle/closed-loop/low-throttle-application/engine-in-vacuum was affected by R&R'ing the Vortec FPR, then either it's broken or you have the fuel plumbed incorrectly. Cleaning the FPR shouldn't have caused the issue to get better or worse when driving in vacuum.
Oh, wait, you said it seems to work fine under WOT and/or once the engine's up to operating temps? Perhaps the O2 sensor is throwing some crazy values at the ECU while it's warming up? Although typically the ECU shouldn't even car about the O2 value until the car's reached a certain temp.
I guess my money's on base timing (perhaps it's too low...enough so to cause issues when in overly-rich warm-up mode) or something involving the FPR.
Oh, wait, you said it seems to work fine under WOT and/or once the engine's up to operating temps? Perhaps the O2 sensor is throwing some crazy values at the ECU while it's warming up? Although typically the ECU shouldn't even car about the O2 value until the car's reached a certain temp.
I guess my money's on base timing (perhaps it's too low...enough so to cause issues when in overly-rich warm-up mode) or something involving the FPR.
#22
For what it is worth; when my 4 wire O2 crapped out, I went back to the OEM single wire that started out in the car in the first place. It is mounted right after the turbo in the RMDP. A couple of times recently I have just started the car and taken off cold and get all sorts of bogging, CEL, and stalling. It is definitely being made much worse because if I hit the slightest boost the Emanage throws in even more fuel because of the O2 signal being low or non-existant. As soon as the O2 heats up, everything is fine.
#30
Took it off and put in the plug! Ran around for a day no change... Check that one off. I set my o2 clamp to (.40) inbetween full rich and stoich a few weeks ago and that seemed to help some. Been messing with the the vac/boost switch and seems to stop doing it as much the later I kick in the clamp. Of coarse transition to boost then again sucks. Gotta be a combo of not enough timing and too much fuel. When the car heats up will burn all the fuel more effecently.
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