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Greddy Evo mod : WARNING! #343694 Dec 5, 5:11pm Dec 5, 5:11pm
Joined: Feb 2004
Posts: 500
Lompoc, CA (805)
falkkor OP
Senior Member
2000 Toyota Celica
falkkor OP
Senior Member
2000 Toyota Celica

Joined: Feb 2004
Posts: 500
Lompoc, CA (805)
Greddy Evo mod : WARNING!
Origional Topic : https://www.celicahobby.com/ubbthrea...o=&fpart=2&vc=1



Ok so I had it done had it on for about a month and a half. Last week my CEL cam on and my car started backfiring like crazy, I felt a huge power loss. the CEL code was P0171: Engine too lean.

Cleaned MAF, Injectors, ect nothing fixed. CEL kept coming back. Had my Resonator put back into the Greddy and Problem was solved...


Be warned

Re: Greddy Evo mod : WARNING! [Re: falkkor] #343695 Dec 5, 8:10pm Dec 5, 8:10pm
Joined: Jul 2002
Posts: 10,123
Milford, NJ
VSGTS14
05 WRB
2005 Subaru WRX STi
VSGTS14
05 WRB
2005 Subaru WRX STi

Joined: Jul 2002
Posts: 10,123
Milford, NJ
how big was ur piping?


SUBARU TECNICA INTERNATIONAL
Re: Greddy Evo mod : WARNING! [Re: VSGTS14] #343696 Dec 6, 12:46am Dec 6, 12:46am
Joined: Sep 2004
Posts: 756
Columbus, Ohio
FastCelicaGT22
Senior Member
2000 Toyota Celica GT
FastCelicaGT22
Senior Member
2000 Toyota Celica GT

Joined: Sep 2004
Posts: 756
Columbus, Ohio
not getting enough backpreasure and it was cousing your engine to go lean. the only thing you can do is to do an ecu upgrade if you want to run that setup. Id just leave the resonator in if its working


"If your not the lead Dog the View never Changes"
Re: Greddy Evo mod : WARNING! [Re: FastCelicaGT22] #343697 Dec 6, 3:20am Dec 6, 3:20am
Joined: Apr 2003
Posts: 802
Calgary, Alberta
shox
Senior Member
2003 Toyota Celica GT
shox
Senior Member
2003 Toyota Celica GT

Joined: Apr 2003
Posts: 802
Calgary, Alberta
I've had my resonator out for like...4 months now and I have an HKS Hi-Power. There's no way your car can detect something like that. The last sensor the Celica has is just after the Catalytic Converter. If you removed the resonator then that sensor should still be intact and working fine because it cannot detect anything after that. I just don't believe you can get a CEL from removing the resonator, you're the first I've heard of for sure.

Re: Greddy Evo mod : WARNING! [Re: shox] #343698 Dec 6, 9:25am Dec 6, 9:25am
Joined: Apr 2004
Posts: 427
Calgary, AB, Canada
speed_celica
Senior Member
2000 Toyota Celica
speed_celica
Senior Member
2000 Toyota Celica

Joined: Apr 2004
Posts: 427
Calgary, AB, Canada
Originally Posted by shox
I've had my resonator out for like...4 months now and I have an HKS Hi-Power. There's no way your car can detect something like that. The last sensor the Celica has is just after the Catalytic Converter. If you removed the resonator then that sensor should still be intact and working fine because it cannot detect anything after that. I just don't believe you can get a CEL from removing the resonator, you're the first I've heard of for sure.

I agree! Think about the people with the Kazuma exhaust, wouldn't they have even less back pressure not have any mufflers, canisters or resonators? And no one I know with the Kazuma had any problems. Could it be anything else that's causing it?

Re: Greddy Evo mod : WARNING! [Re: speed_celica] #343699 Dec 6, 11:53am Dec 6, 11:53am
Joined: May 2004
Posts: 528
Tempe, AZ
renfield90
Senior Member
2001 Toyota Celica GT
renfield90
Senior Member
2001 Toyota Celica GT

Joined: May 2004
Posts: 528
Tempe, AZ
pull it back out for a few weeks and see if it comes back.

Re: Greddy Evo mod : WARNING! [Re: speed_celica] #343700 Dec 6, 2:20pm Dec 6, 2:20pm
Joined: Aug 2004
Posts: 1,029
California
kmlgts
Specialist
2000 Toyota Celica
kmlgts
Specialist
2000 Toyota Celica

Joined: Aug 2004
Posts: 1,029
California
Originally Posted by speed_celica
Originally Posted by shox
I've had my resonator out for like...4 months now and I have an HKS Hi-Power. There's no way your car can detect something like that. The last sensor the Celica has is just after the Catalytic Converter. If you removed the resonator then that sensor should still be intact and working fine because it cannot detect anything after that. I just don't believe you can get a CEL from removing the resonator, you're the first I've heard of for sure.

I agree! Think about the people with the Kazuma exhaust, wouldn't they have even less back pressure not have any mufflers, canisters or resonators? And no one I know with the Kazuma had any problems. Could it be anything else that's causing it?


agree.. thumbsup

Re: Greddy Evo mod : WARNING! [Re: kmlgts] #343701 Dec 7, 2:22pm Dec 7, 2:22pm
Joined: Jul 2002
Posts: 10,123
Milford, NJ
VSGTS14
05 WRB
2005 Subaru WRX STi
VSGTS14
05 WRB
2005 Subaru WRX STi

Joined: Jul 2002
Posts: 10,123
Milford, NJ
yea, it def sounded wrong...
cause removing resonator is sound, nothing for backpressure...like kazuma...
Greddy sucks! ha, i saw others who have it and its fine..ur celica is messed up


SUBARU TECNICA INTERNATIONAL
Re: Greddy Evo mod : WARNING! [Re: VSGTS14] #343702 Dec 7, 5:20pm Dec 7, 5:20pm
Joined: Oct 2003
Posts: 1,572
Chino Hills, CA
DaBigTickett
Rip the Jacker
2002 Toyota Celica GT
DaBigTickett
Rip the Jacker
2002 Toyota Celica GT

Joined: Oct 2003
Posts: 1,572
Chino Hills, CA
good thing i didnt do that mod with my EvoII.

Re: Greddy Evo mod : WARNING! [Re: DaBigTickett] #343703 Dec 8, 4:33am Dec 8, 4:33am
Joined: Apr 2003
Posts: 802
Calgary, Alberta
shox
Senior Member
2003 Toyota Celica GT
shox
Senior Member
2003 Toyota Celica GT

Joined: Apr 2003
Posts: 802
Calgary, Alberta
The backfiring I can understand cause I backfire a little, but not intensely crazy just when I let go of the throttle at high RPMs. But the CEL is still a mystery to me...

Re: Greddy Evo mod : WARNING! [Re: shox] #343704 Dec 11, 1:33pm Dec 11, 1:33pm
Joined: Nov 2003
Posts: 453
Marietta, GA
Jtultra
Senior Member
2000 Toyota Celica
Jtultra
Senior Member
2000 Toyota Celica

Joined: Nov 2003
Posts: 453
Marietta, GA
yea I have a custom megan racing canister welded on from the 1st resinator back. But I did get a CEL from bad O2 sensors went through a whole hectic hoopla to figure it out and I had emmission due. I worked w/ a mechanic at Toyota "cobb county toyota is amazing" and we came to conclusion it had to be the ECU. it was! and he got it replaced under the 80,000 mile warrantee. it was great


The 2ZZ god
Re: Greddy Evo mod : WARNING! [Re: Jtultra] #343705 Dec 12, 3:39pm Dec 12, 3:39pm
Joined: Dec 2003
Posts: 785
norway
celicat23
Senior Member
2000 Toyota Celica
celicat23
Senior Member
2000 Toyota Celica

Joined: Dec 2003
Posts: 785
norway
I had a custom exhaust made, from the cat and all the way back. Removed every OEM part. Backfires? Sure, some times. A slight noticable gain in performance? Yes. Awesome sound? Yes. Check engine light? Never.

Have driven it like I stole it? Yes :-)

Re: Greddy Evo mod : WARNING! [Re: celicat23] #343706 Dec 13, 10:02am Dec 13, 10:02am
Joined: May 2004
Posts: 22
Pennsylvania
2001 Absolutely Red Toyota Celica
shambhala412
Member
2001 Toyota Celica
shambhala412
2001 Absolutely Red Toyota Celica
Member
2001 Toyota Celica

Joined: May 2004
Posts: 22
Pennsylvania
I have done the Greddy Evo II Mod. I have experience minimal backfiring, more like slight pops/cracks. The only difference I have found from modified Evo II and un-modified Evo II is it's super loud, the way I wanted it. Sorry to hear your having problems.

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