i can't figure out why my car redline at 6500 vtec does kick in around 5k-5.5k. and than it redlines at 6500 ? it suppose to redline at 7500 im running a jdmp13 ecu on a usdm h22a1 motor.. could this be the problem?

 

That ecu should work fine. JDM ecus do have a speed limiter at around 115 mph. You sure vtec is kicking in and its not the secondary intake runners you hear/feel? R u throwing any codes? What year is the motor? Im not familiar with OBDII engines b/c Ive never dealt with them but I think some of the sensors on the new motors are a little different.

 

my motor is a 94 stock h22a1 with about 160k on the engine. that ecu is a jdm p13 obd1. so im not sure.. the check engine light came on once before when i redline it at 6500. but its not there anymore and one time i hit over 105mph. the check engine light came on again. but its not there anymore.. you think i can still check? whats the CEL code?

 

maybe i dont knwo something... but isnt if #2 runners open vtec is engaged? or am i thinking rockers?

 

im not sure what you mean by #2 runner open vtec is engaged?

 

wow

Check for any codes. If you dont know how to do that search or look in the FAQs.

 

Jump the 2-piece connector and count the blinking lights.
Easy as that.