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Reply With Quoteive searched for the reasons why a flywheel would do that...but is there any substantiated evidence to this? i have a fidanza and have the misfires as well. annoying, but something i can live with :T
This is a discussion on Flywheel/ Pulley Misfire CEL's... within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Its finally happened to me, after quite a long time of running a ACT Streetlite Flywheel + Lightened Pulley... I ...
Its finally happened to me, after quite a long time of running a ACT Streetlite Flywheel + Lightened Pulley... I guess I'm not so special afterall! No big deal though... clear the code and go on with life.
ive searched for the reasons why a flywheel would do that...but is there any substantiated evidence to this? i have a fidanza and have the misfires as well. annoying, but something i can live with :T
How long were you running the setup?
Its coming up on a year and 20k+ miles for me and I havent had a problem yet. I have the Exedy 13.9lb flywheel and Perrin Pulley.
Dan- 2004 PSM 5spd
"Days get shorter, nights get longer, snow gets deeper, life gets better."
how does your ACT flywheel weigh?
EVO III 16g'd wagon
stock tranny goin strong
.. already ready for a bigger turbo
- - - - - - - - - - -
Originally Posted by chanwahyaoh
I don't think its the weight of the flywheel that cause the misfire. The ecu measure crack postion by the flywheel teeth and if something happens to these teeth, start grins them or something like that it will throw a cel.
it was a lil over a year before it happened to me... but i noticed it was due to driving style... usually, i'd get a phone call and not drive correctly when it happens. sometimes its totally random. its been logged by my tuner and its fake misfire codes, so nothing to worry about. my ACT is a 13.9 lb unit... but it have a exedy 3 puck clutch which is also a lil lighter and then the cobb pulley...
whats crack position?
the weight DOES cause issue, the decrease in time for decceleration is not matched to what the ecu is looking for.
1988 Celica Alltrac
Hallman Pro, 15x7.5 +20mm Rota Slipstreams
2005 LGT 315whp/340wtq@21psi - Sold
VF52, Crucial P&P&C Manifolds, UP, DP, RP, Magnaflow CBE, Hallman PRO, ROMRaider
2003 WRX 371whp/355wtq@24psi - Sold
TD05H-20G-38mm Tial, Meth Injection, Hyperflow TMIC, ROMRaider
Dyno Chart METH vs 93 oct
so if your car was tuned with a lightweight flywheel or pulley would it still cause an issue?whats crack position?
the weight DOES cause issue, the decrease in time for decceleration is not matched to what the ecu is looking for.
EVO III 16g'd wagon
stock tranny goin strong
.. already ready for a bigger turbo
- - - - - - - - - - -
tuning has nothing to do with it.
misfire detection thresholds programmed into the ecu in order to adhere to obd2 standards do. i do not know if oem ecu tuners (ie, openecu, cobb, ecutek) have access to those values --and, if they do, if they know what to do with them.
crank position my bad on the spellingwhats crack position?
the weight DOES cause issue, the decrease in time for decceleration is not matched to what the ecu is looking for.
Last edited by seth7685; 09-08-2006 at 09:58 AM.
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