Shooting flames at idle
okay, so my friends s5 n/a shoots flames at idle every 4 seconds and blows thunderous flames at redline shifts. what is the cause. its pretty crazy
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extremely rich conditions during shifts and misfiring at idle.
neither are really desirable but on high HP setups shooting flames at shifts when really pushing the car is natural but shooting flames at idle is a big finger at a lack of care of the car. |
Why is it natural on just high horsepower cars?
Is it not normal that my NA FC shoots flames sometimes when I shift above 7K RPM just because it is pig rich from the factory and not having a cat allows the excess fuel to go through my exhaust? |
Originally Posted by Sgt. Pepper
Why is it natural on just high horsepower cars?
Is it not normal that my NA FC shoots flames sometimes when I shift above 7K RPM just because it is pig rich from the factory and not having a cat allows the excess fuel to go through my exhaust? BUt shooting flames at idle is a combination of extremely rich and some car care problems. try posting in the 2nd gen tech section to get more info |
I shoot huge flames when I shift at 65 or 7 when I'm running it hard....everytime and even when I let off the gas
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n/a's are rich from the factory so that is fairly normal also but with no cats you actually are losing power so i don't necessarily consider them running right unless tuned. they run as designed, which helped to keep the cat in one piece but without it there is no need for them to run rich any longer.
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Originally Posted by racatech
okay, so my friends s5 n/a shoots flames at idle every 4 seconds and blows thunderous flames at redline shifts. what is the cause. its pretty crazy
Originally Posted by Sgt. Pepper
Why is it natural on just high horsepower cars?
Is it not normal that my NA FC shoots flames sometimes when I shift above 7K RPM just because it is pig rich from the factory and not having a cat allows the excess fuel to go through my exhaust? |
Shooting flames at idle is not a good it's running to rich and is not good on the motor but shooting flames on full throttle is cool it doesn't take a high horse power car to do that.
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My old S5 used to pop blue flames at idle, but it was because I had a blown apex seal
see this is logic a blown apex seal will make the car spit out flames @ idle what does not make any sense TEDDY is saying that on full throttle shooting flames is cool. if you are shooting flames a full throttle it means that your tunning is out of wack. too much fuel not enough air and too little spark those are a couple of things that come to my mind ... come on all you have to do to shoot flames is lay off the throttle a bit and then hammer it back down everybody knows that . so what i would have your buddy do is take a compression test to make sure ur apex seals are ok, because no matter how rich that motor is @ iddle it should not flame out every four seconds.............. :101384_l: |
Originally Posted by teddyrx2
Shooting flames at idle is not a good it's running to rich and is not good on the motor but shooting flames on full throttle is cool it doesn't take a high horse power car to do that.
i mentioned a properly tuned car, only when making decent numbers should well tuned cars still pop flames all the way past the tips, on lower HP cars it is only because they are running stupid rich or the timing is way off. |
[QUOTE=Karack]i mentioned a properly tuned car, only when making decent numbers should well tuned cars still pop flames all the way past the tips, on lower HP cars it is only because they are running stupid rich or the timing is way off.[/QUOTE
:us4allswi :bigthumb: TEDDY you still have time to learn something lol |
stuck/leaking primary injector would be my first suspect.
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Originally Posted by socalrotor
stuck/leaking primary injector would be my first suspect.
anyway goin back to the flaming exhaust last year during the nhra sport compact season opener in west palm beach fl we had an injector mess up on jesus padillas all motor rx7 and still no flames from the muffler @ idle call me crazy but i belive its something else |
If a FPR takes a crap it can dump fuel into the vac system. Pull off the vac line going to it and see if it is leakiing fuel on the vac side.
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thanks
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Hey Karack, is it not common to run a (fairly) rich fuel map on most turbo applications?
I don't blame anyone that shoots flame on shifts and has a turbo... I call that fire "engine insurance" heh. Am I wrong here or what? --Gary |
it is safer but you will lose some gas mileage. ;)
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This is a rotary forum, we don't know the meaning of "MPG" ;P
--Gary |
Originally Posted by Bob_The_Normal
This is a rotary forum, we don't know the meaning of "MPG" ;P
--Gary all we know is car mileage =P |
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