car runs crappy, no code..need help
Thread Starter
TECH Apprentice
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Joined: Jan 2006
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From: Atlantic city nj
car runs crappy, no code..need help car has been running like crap out of the blue. Sometimes it throws a flashing service engine light which I know is a misfire, but it does not store a code or have one pending. I even tried to read the light while it was actually flashing ,and still nothing. the car has heads cam and a dyno tune. wondering if tuner may have caused the care to not store codes. Is there any other way to pull or read the code? what can I do.
If it doesn't have a code, or one pending then no. As far as "running like crap", can you expand on this? Have you lost mpg's, or low end power, top end power, all power? Have you done anything as far as troubleshooting? Did you maybe check the exhaust tubes with a temp gun, or water bottle? How old are the O2 sensors? Do you have a scan tool that will show if the O2's are switching? Does the car have a MAF?
Thread Starter
TECH Apprentice
iTrader: (2)
Joined: Jan 2006
Posts: 386
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From: Atlantic city nj
Misses at mid rpm. I have connected diagnostic tool and has no codes, but throws a flashing ses light on occasion. New plugs and wires. New cam and crank sensors, new o2 sensors. All coils and wire have spark. Was thinking maf but that's an expensive guess. Also fuel pressure is good. Checked for vaccume leak but could not find anything. Intake gaskets are fine.
