wierd ignition problem...

turbonicsperformance · 09-02-2011, 02:27 AM

alright so lets start out there is NO codes BOTH knock sensors are brand new and the cps works perfect
basically the ecu is overcorrecting everything at idle with a 10btdc baseline (pins jumped) it runs around 15btdc corrected and when it starts to come on boost it hits about 5psi and just drops out won't rev and starts to sound like its missing because it pulls so much timing out of it (I replaced the plugs with autolite copper gapped to .030") if i advance my baseline to 15btdc it idles at ~20-22btdc but it will run up into boost just fine atleast up to about 5krpm if i run just a little more then it would probably pull fine all the way to redline.
the only problem with this is that when its idling with that much correction it misses HORRIBLY there is no pinging and the engine is mildly built 550cc injectors maf-t blowthrough nice intercooler forged pistons titan mhg and arp studs it has 1400 miles on the rebuild and has been running perfect until yesterday.
i read somewhere that possibly my balancer pulley has spun is there any factory marks I could look to see if it has spun or not?

cre · 09-02-2011, 10:00 AM

The only way to verify the harmonic balancer is at 0? is to put a dowel or chopstick or whatever you like in the #1 spark plug hole and rotat the crank until it stops rising... That'll show you where TDC is for cylinder #1 is.

09-02-2011, 10:00 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The only way to verify the harmonic balancer is at 0? is to put a dowel or chopstick or whatever you like in the #1 spark plug hole and rotat the crank until it stops rising... That'll show you where TDC is for cylinder #1 is. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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09-02-2011, 02:27 AM	#1
turbonicsperformance 3" Exhaust Join Date: Apr 2010 Location: sarasota fl Posts: 194	wierd ignition problem... alright so lets start out there is NO codes BOTH knock sensors are brand new and the cps works perfect basically the ecu is overcorrecting everything at idle with a 10btdc baseline (pins jumped) it runs around 15btdc corrected and when it starts to come on boost it hits about 5psi and just drops out won't rev and starts to sound like its missing because it pulls so much timing out of it (I replaced the plugs with autolite copper gapped to .030") if i advance my baseline to 15btdc it idles at ~20-22btdc but it will run up into boost just fine atleast up to about 5krpm if i run just a little more then it would probably pull fine all the way to redline. the only problem with this is that when its idling with that much correction it misses HORRIBLY there is no pinging and the engine is mildly built 550cc injectors maf-t blowthrough nice intercooler forged pistons titan mhg and arp studs it has 1400 miles on the rebuild and has been running perfect until yesterday. i read somewhere that possibly my balancer pulley has spun is there any factory marks I could look to see if it has spun or not? __________________ 92 miata 7mgte swap forged pistons,studded mhg, 3 inch dp with a glass pack,blowthrough MAF-T,550cc inj, act stage 2 clutch, fmic kit, greddy rs, full wire tuck, rx7 lsd rear with 4.10s. 15psi "ct26-A"??(waiting on dyno #s) if anyone knows whats up with my turbo let me know it has a larger comp wheel nicer machining and 6 dual fins rather than 5? its confusing and keep finding too much contradicting info. would LLLLLOOOOOOOOVVVVVVVEEEEE a compressor map Last edited by turbonicsperformance; 09-02-2011 at 02:30 AM.