Mechanics

NEED HELP SETTING TIMING

1998 GMC Yukon • 189,000 miles

I replaced intake manifold gaskets because it leaked antifreeze. Put it all back together and forgot to plug in to distributor. Started it up, truck ran horrible. Found that I forgot to plug into distributor and plugged it in. Restarted, and still ran bad. I have a car medic diagnostic, plugged it in and got 7 codes. Unplugged it, plugged it in again and I got 10 codes. Is there any way to test the computer to see if there is something wrong with that? Or what should I do?
Thanks
Scott M
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March 1, 2013.




We need the codes to help you

Roy



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