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I have a cargo van 2003, 6 cilynders 4.3 lt, some times run like have misfire,

(2003 Chevrolet Express 1500)
in Pompano Beach, FL on February 25, 2015
I did change Mass air flow sensor, troat position sensor, spark plugs, spark plug wires, rotor cap and idled pulley also belt tension pulley and still doing the same thing, plase any information i will appreciated thanks to all
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Popular Answer
on February 25, 2015
The days of DIY auto repair are over!!.. As suggested, it needs to be tested to find the problem and then fixed.. Good mechanic will perform a fuel pressure test with a full scan test which includes viewing live data to help pinpoint the trouble, can't guess at it ... Cost too much to do so!!
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General Diagnosis
$88 - $111 Learn More
on February 25, 2015
The days of DIY auto repair are over!!.. As suggested, it needs to be tested to find the problem and then fixed.. Good mechanic will perform a fuel pressure test with a full scan test which includes viewing live data to help pinpoint the trouble, can't guess at it ... Cost too much to do so!!
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sounds like you threw alot of good money at it,try taking it to a good ASE certified technician and pay for some time to get it diagnosed,it might be more cost effective
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