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Steve, Ford Technician
Category: Ford
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Experience:  30 years working for Ford dealer. Ford Master tech.
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P100: I fix the following codes

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how do I fix the following codes? P1000, P1131, P1550, and P1703. All are being displayed while doing a KOER test.

Steve :

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Customer: replied 5 years ago.
Ok..... that cleared everything out, but I still have a problem with it missing while driving at a steady speed. Has plenty of power and accelerates fine. Just replaced the timing belt which had shredded, was trying to get the codes because i thought it may have been a timing issue, and some friends had told me that it would throw the check engine light on if the cams were out.
I would check or replace the spark plugs and the plug wires.

If it is a ztech engine or two cam engine you had to remove the valve cover to replace the belt. Make sure cyl #4 plug wire is on the plug. If not installed first #4 plug wire than it may not be contacting the plug causing the miss.

If ok replace the plugs and wires

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