Back firing???
#1
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Back firing???
Hey, I'm sure this has come up, but I don't have details about a possible cause and I knew someone would have a quick response for me....
I am looking into buying a '94 touring with some upgrades (blitz intercooler, S-AFC, blitz blow off, blitz exhaust) but the guy says it backfires in hi revs and he doesn't know why. Any suggestions??? Thanks
I am looking into buying a '94 touring with some upgrades (blitz intercooler, S-AFC, blitz blow off, blitz exhaust) but the guy says it backfires in hi revs and he doesn't know why. Any suggestions??? Thanks
#4
Rotary Freak
Backfiring is normal for a Modified FD.
It's due to a "richer" a/f ratio dictated by the upgraded ECU. Richer = Safer(less, chance for blowing your apex seals due to detonation from "leaning out".
It's due to a "richer" a/f ratio dictated by the upgraded ECU. Richer = Safer(less, chance for blowing your apex seals due to detonation from "leaning out".
#5
Mr. Links
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Originally posted by originalsterm
Just did a search, could be related to the air/fuel ratio correct? If so, maybe it could be as simple as adjusting the S-AFC?
Just did a search, could be related to the air/fuel ratio correct? If so, maybe it could be as simple as adjusting the S-AFC?
You might be able to remove a little fuel out of the S-AFC to remove some of the backfiring, however I doubt you'll get rid of "all" backfires.
Most of the time you'll get backfires on decceration which is typical. It can be programmed out on some fuel management systems, but I don't know anything about the S-AFC. If you are getting backfiring at any point other than decceleration then you should at replacing the spark plugs, wires and O2 sensor.
#7
Senior Member
Dude... go to performance tuning shop and have your A/F ratios checked .... if they're in the 10 : 1 region under boost.... let the guy behind you worry bout the backfires....
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#8
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That is totally normal as most people have already mentioned to you. It is due to you running rich in my experiences. On a side note they are totally awesome when you have some ricer honda kid who thinks he is the shiz and you blow a flame in his face. We are the only car that does it naturally and it is beautiful but you dont want to be doing after every shift just go and get the thing tuned and you will love it.
#9
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backfiring is NOT normal. it might be common, but not normal. bottom line, the car is running rich, excess fuel is getting spit out and exploding in the exhaust. usually, if you are running a stock cat or high flow cat, and can adjust your a/f, then you can tune it so it doesn't bf. a bit harder if you have straight pipes -
#11
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I also get backfiring but my airfuel gauge jumps from normal to lean and it is telling me Iam not running rich, so is my gauge messed up or could I be backfiring when lean?
#12
Mr. Links
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Originally posted by RedRex7
I also get backfiring but my airfuel gauge jumps from normal to lean and it is telling me Iam not running rich, so is my gauge messed up or could I be backfiring when lean?
I also get backfiring but my airfuel gauge jumps from normal to lean and it is telling me Iam not running rich, so is my gauge messed up or could I be backfiring when lean?
https://www.rx7club.com/forum/showth...hreadid=150756
#14
Rotary Freak
Anytime I get back home and into my garage and shut off the engine without letting it idle for 30 seconds or so after stopping. I get a little p*p.
I used to worry, but it seems to do it all the time for the last three years.
I used to worry, but it seems to do it all the time for the last three years.
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