NightHawkR

I replaced all the vac lines and taking out a nut that dropped into the chamber because of this i had removed the UIM, LIM, turbo, exhaust manifold, then rotated the engine by hand). After putting everything back together and took it for a drive, the car is running lean, getting 15~16 AFR on the gauge on light throttle under 3k, when the car is under low boost (around 8 psi) it went way off the scale even with water meth injection kick in at 4psi.


Came back to the warehouse/office, adjusted boost back to stock level, adjusted air map on safc to run rich, adjusted FPR and bought the fuel pressure up abit, but no difference still running lean.


I didn't touch the fuel system at all when removing the LIM, only unbolted the fuel rail from the LIM. And i double checked the injector clips and they were secure before i put the UIM back on.

I checked the tps and is reading only 500~ ohms, and no matter how much i turn the screw it won't adjust more than 50 ohms +/-.


Anyone got any idea what did i messed up?

RotaryRocket88

iTrader: (7)

Does the car have any hesitations or other odd behavior? Your gauge might just be lying to you. My LC-1 decided to read 1-1.5 full points richer a couple weeks ago, but as soon as I re-calibrated it, the numbers went back to normal.

For the TPS, check voltage rather than resistance. See how that goes.

texFCturboII

iTrader: (17)

Do you have an exhaust leak near the sensor?

NightHawkR

The tps had no problem, my multi-meter was not working properly, readings are fine for both resistance and voltage when i hooked up another meter. I took the wideband out wiped the sensor cleaned it up and re-calibrated the gauge, but it reads the same and i believe is working properly. I checked all the connecting point on the exhaust but didn't find any leak either. I just took it for a drive and it actually got a knock when i was accelerating on the ramp when getting on the highway, i was going easy in 3rd as well only small amount of boost was kicked in for a second or two.


I turtle'd to the next ramp and turned around went back to the office parked the car and started to get worry....



If i just messed up a prefect compression engine for a stupid mistake, i gonna kill myself.