MidwestSi

The car pretty much back fires every once in a while full throttle a couple seconds it will putt putt till it works its way out and everyonce in a while on taking off I also noticed that at stops it almost idles at 0 but when my foot is on the brake the rpms drop let off the brake and it goes up just a little I know its not a leak already checked. I'am throwing a cell 43 replaced filter didn't help. So I'm thinking O2 sensor but I have no idea. Can anyone help, I have also heard IACV put I have no clue how to check it thats it please help its embarrassing to drive a backfiring machine thanks

POE

check your timing and make sure its all correct cam timing and ignition timing.

MidwestSi

it does have a aem cam gear on it but its set just as if it were stock

POE

check all your timing, its prob off, make sure the bottom is TDC and the camshaft is at TDC then set your ignition timing

MidwestSi

whats TDC? No einstein here

MidwestSi

I wouldn't be throwing a cel 43 would i or is that my o2 sensor

2000psi

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MidwestSi &raquo;</TD></TR><TR><TD CLASS="quote">whats TDC? No einstein here</TD></TR></TABLE>

Take it to a mechanic.

MidwestSi

But that wouldn't throw a cel would it?

MidwestSi

so whats throwing my cel 43 o2 or what?

MidwestSi

Well I checked timing and ignition all set right does anyone else have any ideas what could be doing this, I'm thinking O2 sensor.