Starts up runs rough and when it is put in gear it studders and misses.

1999 BUICK PARK AVENUE
156,000 MILES
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KROMSCHROEDERR
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  • 1 POST
My 99 park ave has two trouble codes, p1404, p0300 how do I check the operation of the EGR valve and is this a good place to start?
Nov 29, 2011 at 8:31 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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