I just put a ld9 in my cavi it had a ld9 but now when it is running at idle runs perfect but if I try and hit the gas it feels like it is going into
a limp mode,gm says it can detect a motor swap in all my years of doing motors(older cars)I have never seen where the car will go into a limp mode.
I could see this on newer cars but I have never seen this on older cars.
the problem im having is like I said if I drive the car and slowly press the gas it will go all the way to the redline
but if I hit the gas (try and pass a car it sounds like it has a really bad miss..

Something is wrong.

Our PCMs are incapable of telling if the engine was swapped. Literally 100,000 of these engines have been swapped...





PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO

-MD- Enforcer wrote:Something is wrong.

Our PCMs are incapable of telling if the engine was swapped. Literally 100,000 of these engines have been swapped...

This. You have a mechanical issue somewhere. Do you have a spare throttle positioning sensor to try?



"In Oldskool we trust"

If it idles fine, it's sounding like a TPS issue to me.

Our cars do not have a limp mode.

Sounding like a TPS issue also.

Does it have a CEL?



FU Tuning