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> Code 14, rough idling, misfiring sub 2000 rpm, Fixed. Odd issue.
post Jul 21, 2009 - 11:30 PM
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stephen_lee



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OK guys. I bought a 1995 ST recently. its always idled rough when warm, but when i first start it, it runs fine. well lately its gotten worse so i replaced the WHOLE dizzy w/ a known good one, plugs/wires(new toyoa), and throttle body. Helped for awhile then the issue returned. It got steadily worse till tonight where it completely died on me while driving. wouldnt start. no spark at all.. i swapped dizzys out again and it reverted back to the original random misfires.

Replaced:
  • Dizzy
  • Plugs
  • Wires
  • PCV valve
  • IAC
  • TPS

So i checked the CEL codes and i pulled a code 14: Ignition Signal - no IGF signal to ECU 4 times in succesion.
Not the ignitor, cant be since 2 had the same issue.
i wiggled the wiring around and no changes.
Resetting the ECU helps for about 20 min.
Wiring or the ECU is the only other things i can think of unless there's something i missed.

Any suggestions?

This post has been edited by stephen_lee: Jul 30, 2009 - 1:55 PM


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QUOTE
"And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH

1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED
1995 ST: SOLD @273k miles, Auto, all power, CarPC, White
1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810
1994 Lexus LS400: This is my new DD
 
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post Jul 22, 2009 - 1:07 AM
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pittfirefighter



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so check the commons first...
plugs gapped right
timing right for dizzy
this is a big one... CHECK ALL YOUR GROUNDS, CHECK ALL YOUR POWER FEEDS including fuses
sounds like you have a bad connection somewhere...
you wouldn't throw that code if it was an ecu issue... broken wire would give you more problems than random misfires... my money is on corroded ground... start at the dizzy and work your way back... ignitor has its own ground... check it... battery ground... whole deal... make sure your fuses don't have a partial burn

This post has been edited by pittfirefighter: Jul 22, 2009 - 1:07 AM


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