Ok, so I am having a problem. I was driving my car around pretty hard through the country raods awhile back and all of the sudden, whille I had my foot to the floor...it's started to backfire repeatedly and would not accelerate. I could accelerate if I didn't push the pedal down more than half way...I could TAC it out, but as soon as I got on it, it would POP,POP,POP!

by the way...I have a 1996 LS with a JDM GSR swap...not that it really matters in this situation...

So, I decided to pull the car in and do some TLC to my car that was much overdue.....

~New Head gasket
~New Cap (whole distributer is less than a year old...cap was cracked...rotor was still in good shape)
~New Throttle Body Gasket
~New Intake Manifold Gasket
~New Spark Plug Seals In Valve Cover
~New NGK Irridium Spark Plugs
~New Omni TPS Sensor
~New Fuel Filter (thought that might be why it was backfiring....it was extremely clogged/dirty, but it did not stop the back firing)
~Reset The Timing

Now, after all of that, it still does it and here is a key point....it only does it when it gets warm. I can floor it when it's cold and it will not putter at all! PLEASE HELP ME GUYS!!!

 

Back-Fire is mostly due to Ignition Failure. So it can be anything from Spark-plug to Dizzy.
This happen to me before when I drove on the HwY and the car back-fire like crazy under full-throttle but partial thottle it was OK.

Check you IGNITER & Ignition Coil. I replace both and it didn't back fire anymore.

 

maybe your belt skipped a few teeth?

 

Yea...I was thinking that, but I just replaced the coil less than a year ago when it completely failed on me in the middle of a busy intersection! lol I will leave that as a last resort...but if it is then I will probably go with MSD.

 

I checked my belt...that can't be it, because it would be doing it all the time....wouldn't it? I figure if it were timing, it would be constant....???

 

So the Coil is new but the Igniter is Old??? I've this problem 2years ago and couldn't figure it out why my car keep Back-fires for 2week. I change everything Spark-plug,cap&rotor,Spark-Wires. But it still backfire, until I brough the igniter & coil that it stop backfiring. I got the igniter &coil on ebay $100 for both.

 

Borrow someone Dizzy and test it out for a day. I think you will find out if it is the cause or not.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by honda1982 &raquo;</TD></TR><TR><TD CLASS="quote">So the Coil is new but the Igniter is Old??? I've this problem 2years ago and couldn't figure it out why my car keep Back-fires for 2week. I change everything Spark-plug,cap&rotor,Spark-Wires. But it still backfire, until I brough the igniter & coil that it stop backfiring. I got the igniter &coil on ebay $100 for both.</TD></TR></TABLE>

I will try that out.....when you buy the whole dizzy....it only comes with a new coil, rotor, and cap??? If that's the case, then the Ignitor is the original JDM!!! lol I had someone install the dizzy for me awhile back and it ran great until now....I will look into the ignitor...thanks