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Just to clarify first, I’m running the t-bird la-3 with the vam for my engine management. I kept most thunderbird sensors with the exception of my IAC, TPS and oil pressure sensor. First two have been replaced by me since I’ve had it, also replaced fuel pump. Truck has had idling rough and running rich issues since before I put the motor in and it was still a 2.3 NA with the Ranger ecu.
I’m at work today so I’ll do some more diagnosis when I get home. Running old 35lb t-bird injectors, brand new pressure regulator. Old engine ran rich before and idled poorly before I installed new tps. I installed a new motorcraft tps which helped some initially but over time it returned to its initial state. Last night I verified that the o2 sensor was getting all the right inputs and outputs voltage wise. I’ll go over the tps tonight.
@SenorNoob TPS voltage was decent. Showed 1.2-1.3 closed. Went all the way up to 4.775 at WOT. Removed it and put it at .96 while plugging the hole in the throttle body to see if I would change poor idle condition but nothing changed. Scanned ecm, would occasionally give code 14 for PIP failure and code 41 - o2 sensor out of range intermittently. 14 would explain randomly cutting off issue and 41 would explain random and sudden drops in rpm. I cleared the codes and let it run for a while, scanned again and gave a pass code of 11. Still the truck would run rich with rough idle. Engine running test output 3 codes: 12(rpm out of range) 25, (knock not sensed during during dynamic response test- WOT) and 34( Egr valve not opening). 12 because I had to keep it running while running the test by giving it throttle. 25 because I don’t have a switch to run high octane mode like the tests asks for. 34 because I deleted the EGR valve after flipping the exhaust manifold. Also checked that cam/ crank timing was correct.
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