ok i got my car back from the tunner about a 3 weeks ago and everything was great now a couple days ago i noticed my car was missfiring while standing at a light. i changed my plugs (1 step colder gapped at .025) and also changed my wires with new OEM wires. still missfiring. vaccuum seems normal ( 23psi at idle).. what else could it be. should i be gapping my plugs at a diffrent point? should i go onto change the cap and rotor?

second thing being. i was getting on the expressway from an onramp and i was in 3rd gear at about 4k and when i hit it to go it go up to about 6k and it felt like boost cut. the rpms stoped going up and it felt like a bump. i dont really know how to explain that but today it happend again but in second gear? what could that possibly be if anyone knows what im talking about.

thanks for the help!!

 

give some info on the setup.

do you have the ability to datalog?

 

setup is a sc61 running at 9lb making 350. 1000cc injectors tunned on ectune. i have a motes datalog cable but it never worked when i hooked it up to the ecu for some reason??

the thing is though is that it went through the rpms till 8 like a champ a week ago. could the boostcutish feel be related to the ignition breakin up from the misfire?

 

go to eCtune.com and download the latest version should be 2.0R7.

If you can get the datalogger to work it help solve you problems.

 

damn son 23psi of vacuum at idle . Your engine is defying the laws of physics . I think you meant to say 23in/hg.

 

how many psi are you seeing when you have the cut issues? what are your AFRs like? I know I have issues with cut or jumping to a lean point when the temp takes a huge drop.

 

could the wrong spark plugs cause something like this? because only today did i realize i wasnt using the bkr7e's and will only get them tomm??