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Violent riding...sometimes
Posted: Wed Oct 20, 2010 1:34 pm
by johnnyboy87
When I'm cruising on the highway randomly the Service Engine Soon light will come on and as soon as it does the engine starts bucking and jerking. Its very violent. The only way i've found to get it back to normal is to get about 5mph over what i was originally doing, or, putting rpms around 4k and as the engine slows back down to cruising speed the light goes off and the engine purrs as smoothe as ever.
Help?
Re: Violent riding...sometimes
Posted: Wed Oct 20, 2010 2:23 pm
by J Wikoff
Re: Violent riding...sometimes
Posted: Wed Oct 20, 2010 3:26 pm
by robertccach
misfire maybe?
Re: Violent riding...sometimes
Posted: Thu Oct 21, 2010 2:36 am
by johnnyboy87
its not showing any codes. the CEL turns off and the scanners here aren't reading any codes.
Re: Violent riding...sometimes
Posted: Thu Oct 21, 2010 9:25 am
by J Wikoff
Did the paperclip trick give you anything? Do any of the gauges do anything out of the norm when it's happening?
Re: Violent riding...sometimes
Posted: Thu Oct 21, 2010 10:22 am
by willwren
You need a proper scanner capable of reading HISTORY codes.
Re: Violent riding...sometimes
Posted: Thu Oct 21, 2010 10:24 am
by J Wikoff
Doesn't the paperclip trick give history codes?
Re: Violent riding...sometimes
Posted: Tue Oct 26, 2010 2:41 am
by renchjeep
If it's a 93, I believe it will not hold history codes. Pre-OBD2. You will need to retrieve codes before shutting it down.
Re: Violent riding...sometimes
Posted: Tue Oct 26, 2010 9:39 am
by J Wikoff
My 92 holds codes. You can shut down, turn the key to on, and pull codes. I just don't remember if the paper clip will tell you every code set since the last clear (which, I think it does, but not sure), or just the current ones. I do know it will show a momentary TPS LOW code, for instance, after a shut down and key on. That's the last code I pulled via paper clip before I got a scantool.
Re: Violent riding...sometimes
Posted: Tue Oct 26, 2010 2:33 pm
by willwren
OBD1 does hold history codes, renchjeep. But it requires a scantool to retrieve them. The paperclip trick will only report current codes.
Re: Violent riding...sometimes
Posted: Tue Oct 26, 2010 5:52 pm
by human
Sounds a bit like what happened when one of the ignition coils went bad on my '97 Cadillac last year. I replaced them and she's been purring like a kitten ever since. Too bad she's leaking oil like a sieve, though. Then again, that's why I'm now driving a Bonneville.
Re: Violent riding...sometimes
Posted: Fri Oct 29, 2010 3:07 am
by renchjeep
willwren wrote:OBD1 does hold history codes, renchjeep. But it requires a scantool to retrieve them. The paperclip trick will only report current codes.
Thanks, Will! My OBD1 memory has gotten a bit fuzzy over the years......
Re: Violent riding...sometimes
Posted: Mon Nov 01, 2010 2:25 am
by johnnyboy87
sorry computer was down for a week. i did find a proper code reader and i got codes 12, 26, 36, and 44.
I read what they all are but dont really know what they mean exactly.
again, sorry for getting back to yall so late.
thanks for all the help.
(didn't know anything about a paperclip trick)