starnge missfire.. Need help.. :(

[Mike Neal]

So within the last few days my car has started to have this strange miss fire.. This is how it happens.

I will accelerate normal or hard(getting into boost) 1st gear it seems fine.. 2nd gear seems fine. when I shift into 3rd gear and the rpms get to 4k it gets a viloent missfire and wont accelerate. I shift in to 4th and no miss untill about 3-3500 then it comes back. I shift into 5th and the same thing. But as I drive down the freeway when it misses I put the clutch In untill it idles down to just under 2k rpm and release it and then the miss will be gone for a lil but untill I try to accelerate. Also it sometimes just happens while not even accelerating.

The only think I could think that made it sound like its missing like that is.. I just installed a large FMIC and the IC pipe blew off and with that off it made the same sound of a missfire. But I have since fixxed the problem of the IC pipe blowing off and its been fine for a week or so.

Car:

1995 gsx w/6bolt swap. t-25. FMIC full exhaust 98ecu so pretty much stock. I am still new to DSM's and am not sure where to begin to fix the problem. (I just put new plugs in today NGK bpr7es)

Any help would be GREAT!!!!


Thanks,

Mike

 

[B0oSteD95gsx]

mike welcome to your money pit. i would check your power transistor..some call it a ignition control module as well if you go to advanced auto or other parts store.I would also check your coil packs,plugs,wires,cam angle sensor,battery,alt. then check back in.

 

[Mike Neal]

HAHA Yeah money pit is right. I was told "wait until you start modding it.. you start with basic stuff like a Front mount etc..." ha.. sure enough put a FMIC on and now a week or two later got a problem.. probably not related but still a weird coincidence (may need spell check on that one )

I put new plugs in today, Didnt fix it. How do I test the other things you mentioned?

Thanks for chiming in BTW :fork:

-Mike

 

[Mike Neal]

I went through a bunch of stuff, tightened hose clamps and cleaned the MAF and now the miss is gone! I should have tried one thing at a time so I know what it was.. but the miss doesnt happen so I am happy again!