89, intermittent miss from start until its up to temp for about 10 min

P. Lee35

New Member
Sep 5, 2018
1
0
1
Milton, tn
I have a89 5.0 with some high performance stuff on it. Gt40 heads, cam, pro comp intake, 24lb.injectors , BBK headers, fuel pressure reg. And the car runs amazing once it's good and heated up. But when it's cold it got a studder or hard miss that feels as if the car shuts off completely for a split sec then hits hard when it comes back. It's real b bad when cold but once it warmed up it hardly ever does it. Any suggestions?
 
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Dump codes sticky

Look at the top of the 5.0 Tech forum where the sticky threads are posted. One of them is how to dump the computer codes. Codes may be present even if the CEL (Check Engine Light) isn’t on. You don’t need a code reader or scanner – all you need is a paper clip, or if your lady friend has a hair pin, that will do the job.
I highly suggest that you read it and follow the instructions to dump the codes. http://www.stangnet.com/mustang-forums/threads/how-to-pull-codes-from-eec4.889006/