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|10-07-2008, 10:28 AM||#1|
Join Date: Oct 2008
Location: San Antonio, TX
cold start problem HELP!!!
I have an 88 Blazer and when I start it (cold or hot) it runs real ruff, as if its missing real bad. but when i put it in gear, it smooths out. Also it runs real rich with some black smoke out the *** end. just got done doing a head gasket job on it cuz it overheated real bad. wondering if any sensors went out. thanks
|10-07-2008, 10:30 PM||#2|
Join Date: Dec 2002
Location: Kermit, TX
I would start by double and triple checking the firing order. If that checks out then do a compression test. I would also check the timing, on the tbi system there is a plug with a brown wire to the distributor you have to disconnect to set the timing, not exactly sure of the exact location since I've never worked on one that was still a factory setup. Also go over all your vacuum connections. Make sure the MAP sensor has a tight vac. connection and is plugged in good. I had all kinds of hell when I did the swap on my truck because I didnt have the right sensor.
Start with the basics first, then go from there. Let us know what you find.
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