Vehicle Wont ACCELERATE PAST 2,500!
 

p0101, p0102, p1220, p1516....... Vehicle Bogs down starting at 2,500.... Shakes and backfired one time.. wont accelerate any more after 2,500...

Installed new plugs and wires today no difference... Cleaned MAF.. No difference... Unplugged MAF No Difference... Vehicles barely running.. When throttle is wide open in neutral it peaks a couple grand rpm's lower than redline/Govenor..

2000 3.8 55,000 MILES

Freeze Frame

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reason for freeze frame throttle pos
rpm 2492 57mph
load value 17.5%
air flow rate 22.54 gr/sec
map sensor 64
coolant temp 194
short term fuel trim1 0.0%
long term1 15.6%
short term fuel trim2 0.8%
long term2 17.1%
short3 50.0%
long3 92.1%
short4 -89.7%
long4 53.9%
fuel system 1 and 2 closed

Limp mode...it will make it where your car wont run right...I dont know the cause, could be your alarm system.

Clogged cat maybe?

Low Transmission fluid?

Halogen fluid must be aon he fritz

looking at those codes I lean towards a short in your main harness to the engine or bad pcm, or just completely bad maf (do you have a k&n filter they can kill a maf if recently cleaned) the other codes are tps.

Sounds like a bad ECM \ Wiring harness as Arch said. It pretty much has to be electrical based.