Overtaker

I am clueless
what's the sign of misfire?
and the possible causes?

Overtaker

c'mon gimme some clue plz

sporff

you should be able to hear it miss. it'll sound like stumbling or missing a beat. misfire at idle or at higher rpms or what? it can be lots of things

Overtaker

hmmm
low rpm i guess
i'm having problem with low rpm
the engine runs strong in high rpm

lemme listen to my car first
*gets stetoscope*

SpiritR

Thats not a miss-fire then.. Sounds like bigger problems. Usually miss-fires will pop in higher RPMs

chinqlinq

is misfire and backfire the same thing? i get a some 'backfire' after reaching high amounts of boost...i figure this is normal in a lot of ways...but if misfire does not = backfire...whats misfiring? thanks...

im a noob btw...i've only heard of mis-firing system from initial d...

-Dan

SpiritR

Mis-firing- a pop from lack or spark, fuel, or air, comes from the engine usually, but can be heard threw the exhaust.

Backfire- many things cause it but not really a problem. Usually if you rev up high or boost, it will blow the crap out.

Mis-Fire can also cause detonation, which leads to BOOM of the engine.

If its low rpm, have you done any mods?

Overtaker

well
i listened to the car on low rpm
around 2 - 3
it seems to miss a beat here and there
and the car often goes irregular on rpm below 3
that is the car is like jerking off suddenly even when i'm pretty sure i lifted my foot from the clutch pedal pretty smoothly

i got apexi FMIC, mid pipe, downpipe, aftermarket ECU, dual blitz bov, apexi dual power intake and hks exhaust

JONSKI

Have you tested your dash pot?


Check out page F-133 of the FSM (Factory Service Manual).
You can download chapter 'F' from www.iluvmyrx7.com