06-05-2012, 10:52 AM
Join Date: Mar 2011
Location: Ballina Australia
Total Cats: 2
odd High boost misfire issue.
I'm hoping someone can help me with my misfire issue.
the problem is I get a series of what feel like misfires when im in high boost.
It does not always happen but it does happen most of the time.
it happens a little at 6psi and lose all power at 10psi.
The most odd thing about it (pretty rare to happen but I can make it happen by keepign my foot on the throttle while it misses) is it sometimes continues to happen for 100-200 meters down the road after the revs have dropped and I get back onto the throttle to keep the car at cruising speed (hope that made sense)
about my car:
diy t25 turbo kit
things I have tried to fix the problem:
-changed spark plugs (although it was to old warmer plugs from before the turbo conversion)
-bought another toyota coil and tested it in each place
-rewired my cops harness
-added in cops capacitor
-looking through my datalogs to see if anything is indicative
-regaping the plugs
things to note:
my afr doesnt go very rich or lean before the misses
my battery is sorta on the way out
I have no idea what to try next (I do have brand new ngk bkr7e's ordered to replace the current bosch ones) I am not even 100% sure if its ignition related I think there may be some kinda protection in the ecu as it has the misses after the even occasionally like stated above.
thanks for any help.
I can post up a datalog and my tune if people think that would help