conus00

#1

I have installed custom made 3in short intake with K&N filter.
My car now (sometimes, not very often though) backfires. Very loud pop, you can even feel the gas pedal shudder. Usually from neutral to 1st on very low RPMs.

It is highly annoying! Also it seems to me that my MPG got worse. Funny, I actually thought that installing after market air filter would IMPROVE it.
what's wrong?

Has anyone here experienced the same problem?

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'94 ST

808celica

#2

did you hook up the air sensor from your old one?

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I don't normally drive fast, but when I do its on a curvy section of this island

95CelicaST

#3

Reset the ECU? Plug in the intake sensor?

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1991 MR2 - T-tops - Crimson Red - Gen3 3SGTE - Lots of moneyI'm not really an asshole, but I play one on the internet.**** Photobucket

conus00

#4

Yep, intake sensor is in (I'm assuming that is the rounded-spiked-one which was originally in the airbox) and no I didn't reset the ECU because I don't know how.

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'94 ST

Batman722

#5

>

QUOTE (conus00 @ Feb 22, 2010 - 7:47 PM)

>Yep, intake sensor is in (I'm assuming that is the rounded-spiked-one which was originally in the airbox) and no I didn't reset the ECU because I don't know how.

pull the "EFI" fuse in the engine bay fuse box, wait 30 sec, put the fuse back in.
Drive around.

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my st205 swapandour Beams swap

6gen91

#6

lol i ran straight pipe all the way back and mine backfires all the time, i dont see anything wrong with it, i think it sounds quite RAW lol

trdproven

#7

air filter is simply just an air cleaner really, it does not do anything to harm your motor. Unless a sensor or mechanical failure somewhere.

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94 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tom's|Competition Clutch|5Zigen|Apexi||Laille/Beatrush|Magnecor|Denso|Royal Purple|Optima|PIAA|PW JDM|Megan Racing|Nitto||Work|Greddy|Samco|Project Mu|H&R|Gates|Moog|Rota|Yokohama|Epman|1320|Upgr804 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tein|BC Racing|Greddy|89 Supra (Sold)90 Supra (Sold)

conus00

#8

^
I understand. But unfortunately the backfiring started immediately after I installed the setup. It HAS to be connected somehow.
@Batman722 I will try to follow your advice.

This post has been edited by conus00: Feb 23, 2010 - 1:49 AM

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'94 ST

zoik

#9

i you have backfire,try to check your spark plugs, the gap had become too wide on mine, i used a (dont know how you call it, the set of metal plates of different thickness) to get it within specs.

Maybe you have some grease on the sensor too, use some alcool to clean it.

808celica

#10

>

QUOTE (zoik @ Feb 23, 2010 - 12:53 AM)

>i you have backfire,try to check your spark plugs, the gap had become too wide on mine, i used a (dont know how you call it, the set of metal plates of different thickness) to get it within specs.

Maybe you have some grease on the sensor too, use some alcool to clean it.

spark plug gapper

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I don't normally drive fast, but when I do its on a curvy section of this island

trdproven

#11

>

QUOTE (conus00 @ Feb 23, 2010 - 4:47 PM)

>^
I understand. But unfortunately the backfiring started immediately after I installed the setup. It HAS to be connected somehow.
@Batman722 I will try to follow your advice.

thats use to reset the ECU. Did it work for you?

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94 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tom's|Competition Clutch|5Zigen|Apexi||Laille/Beatrush|Magnecor|Denso|Royal Purple|Optima|PIAA|PW JDM|Megan Racing|Nitto||Work|Greddy|Samco|Project Mu|H&R|Gates|Moog|Rota|Yokohama|Epman|1320|Upgr804 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tein|BC Racing|Greddy|89 Supra (Sold)90 Supra (Sold)

conus00

#12

Didn't have a chance yet. Will let you know as soon as I try...

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'94 ST