was just wonderin if my ecu is having probs or is my motor just tired. when i got the car the guy said he thought the motor had about 90,000 miles on it and ive put about 10,000 miles on it to this day

gsr stock internals only bolt ons got it last aug 07
ecu is chiped with chrome i believe

so when i got the car. well 2 days later i took it out with a friend the morning of my wedding and did 140 to 145mph in it pritty easy. but that was top speed.

about 2 months ago i noticed i could only do 120mph. and thats at the end of 4th gear when i go into 5th its like it doesnt want to to any more it dont bog down or anything. and i have no rev limiter.

now i have sprayed 1 and a half 10 pound bottles of 55 shot nitous and the other half was a 75 shot. is my motor just tired or do i need to look into the ecu? if anyone wans to come look just let me know i need help befor i buy a new motoron what my next step is

 

Spray does it again.

 

thats what you get for doing 145mph on public roads....its not your ecu, do a compression test and Im sure you'll find low numbers