Originally posted by stangerang
well, basically, it should run fine if you dont rag on it......... the ECU just isnt going into closed loop operation........ so your not getting optimal performance at WOT....... most likely it is running too cool, but i would like to say it isn't because of the 4.6's tendency to run hot......
you said you had the intake T'd somehow............... are you bypassing the coolant sensors?
NPI intakes have 2 holes for sensors, the PI's only have 1. I used a nipple and brass T-fitting so both sensors could in effect go into the 1 hole. the problem is now they are suspended horizontally about 2" above the intake (where the "T" outputs), and coolant doesnt flow up there very well. IT hasnt really been a problem for 2 years, but i developed a leak at the t-stat housing-to-intake area, so this weekend I replaced the o-ring and added some RTV. I think this may have remedied it, as the car seems to run much better.
None of this will be an issue in 2-3 weeks, as the new motor should be going in
I just didnt want to tear up a good PI motor.
