94 LS400 runnin rich HELP
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94 LS400 runnin rich HELP
long story.....94 ls400 would not run......found both rotors fried and broken..left bank coil firing constantly.EVEN when engine not running...sent out ECM found ignition drivers fried..repaired and tested....runs great now but running way rich and will foul plugs 20 miles.....no codes in memory
Last edited by pumpmikey; 08-13-14 at 06:27 AM. Reason: dummy
#3
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changed title to LS400 and moved to LS400 section.
change the plugs, hoping you already changed the rotors and caps.
sometimes they can't rebuild those things well. maybe try a good used ecu.
also could be a weak o2 sensor or a bad coolant temp sensor. on a 94 it hardly ever trips any codes.
change the plugs, hoping you already changed the rotors and caps.
sometimes they can't rebuild those things well. maybe try a good used ecu.
also could be a weak o2 sensor or a bad coolant temp sensor. on a 94 it hardly ever trips any codes.
#4
who repaired your ECU? most shops are not in the know about what capacitors to replace.
happy reading!
https://www.clublexus.com/forums/ls4...capacitor.html
happy reading!
https://www.clublexus.com/forums/ls4...capacitor.html
#5
long story.....94 ls400 would not run......found both rotors fried and broken..left bank coil firing constantly.EVEN when engine not running...sent out ECM found ignition drivers fried..repaired and tested....runs great now but running way rich and will foul plugs 20 miles.....no codes in memory
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thanks for changin title for me.....circuitboard medics repaired it....have had good work from them in past...they cured ignition driver issue....and repaired injector drivers 2 yrs ago...said inj tested good...will check c,s, injector....THANKS
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94 ls400 does not have cold start injector....and I alreaady tested and replaced temp sensor slightly out of specs......Car runs great other than the plume of black smoke
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#8
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You might have to pay to hook it up to a diagnostic machine that shows how the plugs are firing. Not the one to pull codes. It's the fuel is not being burned and some gas is being dumped into the cats. You need to find the root cause and take care of it before your cats are damaged.
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who repaired your ECU? most shops are not in the know about what capacitors to replace.
happy reading!
https://www.clublexus.com/forums/ls4...capacitor.html
happy reading!
https://www.clublexus.com/forums/ls4...capacitor.html
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