once i get around 4k and start boosting up my car studders bad in any gear, i can get the rpms up higher with no boost but once i start to boost it cuts out and back fires. i know that it is not my a/f cause i have the new aem wideband sensor and its reading a good a/f. once i put in a quaife lsd is when it started happening. i am not that good on all the sensor stuff and was wondering if anyone could help me on this one. also at what rpm does the 2nd set of butterflies on a stock gsr intake manifold come in?

 

anyone?

 

Is your map sensor seeing the boost ? If it is mounted on top of the throttlebody you need to move it and block off the hole on top. Hook a vaccumm line before the turbo and hook it to the Map sensor.

 

OK i reset the ECU and retried to pull it up above 4k same problem when i check the ECU code it comes up with 21. I looked it up and it says its the VTEC controler i checked the voltage and its at 3.76v with the key on the on postion but not running. According to the manual your suposed to have ~12v with the key in the on position but not running. i checked with another ECU and got 11v but i had the same problem when i pull it up abopve 4k. i also traced that wire back to my ecu to see if it was a bad wire but i am getting the same voltage from there the 3.76v. if my problem is that i am not getting the 12v with the engine off is it because i have a bad ecu? what would fix my problem? If any one has any other sugestions please let me know and help is greatly apreciated.

 

whats up chris, this is sean.

someday soon i will come over and we can swap parts (ECU, VTEC controller) between our cars to see what fixies it.

 

wiring? it sounds like an ignition problem tho

 

thanks, i was talking to someone today and said that since i dropped the trans i might not have gotten all the grounds bolted back down tight and to check those. would the speed sensor cause problems like this i read that it has some control over the injectors and thats the only sensor that was really messed with cause its on the tranny and all. let me know what you think