check engine light

ZOMBIE 4x4 BOARD > General :: Tech Talk :: > check engine light

check engine light - Posted By bigbadjeepster (bigbadjeepster) on 11th Jan 09 at 6:30pm

The check engine light keeps comming on and off in my cruiser. It has a stock TBI 350 in it. When it comes on its usually at idle or under a load. When I rev it up, the light usually goes out. No I dont have a code reader, I wish I did.
Ideas....? O2 sensor maybe? I hate to throw money at it when I dont know the problem. By the way, it runs normal with the light on or off.

Re: check engine light - Posted By bigbadjeepster (bigbadjeepster) on 11th Jan 09 at 6:31pm

Re: check engine light - Posted By jiMMythejerk (jimmythejerk) on 11th Jan 09 at 7:00pm

most places will pull codes for free, ie.. napa-kragen, maybe local shop

Re: check engine light - Posted By bigbadjeepster (bigbadjeepster) on 11th Jan 09 at 7:14pm

will it show the code even with the light off?

Re: check engine light - Posted By HOGAN (hogan) on 11th Jan 09 at 10:35pm

it should store the code in the computer.... Maybe you should replace the check engine light..

Re: check engine light - Posted By fuzzyz (fuzzyz) on 12th Jan 09 at 3:01pm

Posted By bigbadjeepster on 11th Jan 09 at 7:14pm

will it show the code even with the light off?

damn you n00b! of course it stores the last couple codes in the computer even if the light is out our atleast it should. why not learn something about vehicals befor ya start working on them! :flipoff:

Re: check engine light - Posted By bigbadjeepster (bigbadjeepster) on 12th Jan 09 at 4:59pm

Actually the light is supposed to stay on even after the problem goes away. Once it has 7 good starts in a row, the light goes off. no light=no code. Thats why Im asking my question because it goes on and off within minutes. DUMBASS! :flipoff:

Re: check engine light - Posted By bigbadjeepster (bigbadjeepster) on 12th Jan 09 at 7:58pm

OK, I think I got it. I checked the timing and it was pretty far off. I set it at 4 with the brown connector unplugged. It was at 12! Then I cleared all the codes by unplugging the battery for 30sec. I jumped pins A and B on the obd reader plug and it had no present codes after I reset it and ran the motor for a while. I'll drive it to work tonight and see if the light comes back on.

Re: check engine light - Posted By mikeb (mikeb) on 12th Jan 09 at 8:52pm

I think stock TBI is suppose to be set at zero with the brown wire unplugged. I could be wrong though.

Re: check engine light - Posted By jeremyhengl (jeremyhengl) on 12th Jan 09 at 10:49pm

are you sure its not a charge light ? and the alternater is taking a shit

Re: check engine light - Posted By bigbadjeepster (bigbadjeepster) on 13th Jan 09 at 7:52am

Yea, its supposed to be at 0, but I read a few articles that 4-6 will wake it up. As long as I dont get spark knock, I should be fine.
I drove it to work last night, beating it the entire way there. No light yet. This weekend will be the final test. Towing the little trailer up to the snow with all my gear.

Re: check engine light - Posted By mikeb (mikeb) on 14th Jan 09 at 10:16pm

I'll try it.

Re: check engine light - Posted By jiMMythejerk (jimmythejerk) on 14th Jan 09 at 10:42pm

silly computers.

Re: check engine light - Posted By mikeb (mikeb) on 14th Jan 09 at 10:44pm

i hate computers

Re: check engine light - Posted By jeremyhengl (jeremyhengl) on 15th Jan 09 at 12:17am

YA KILL YOUR TV

Re: check engine light - Posted By J-Dub (imuzme) on 19th Jan 09 at 12:40am

Cheeks if it is an OBD II i have a reader(see my thread) but if your jumping pins that sounds like a OBD I....

Re: check engine light - Posted By yeagley (yeagley) on 19th Jan 09 at 9:36am

OBD II is 1995 and newer