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Old 05-17-2007, 06:47 PM
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MT-2500 MT-2500 is offline
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Re: 4.8 2500 GM Idle/Acceleration Problems

You may have to get engine scanner on it and look things over.
Check for good hot blue spark to all plugs and see if any cylinders are missing.
Also pull vacuum hose off of fuel pressure regulator and look for gas in vacuum line. And for any sensors or wires or hoses that could have been left unplugged or knocked off.
Was it doing it before spark plugs changed?
Good Luck and let us know how it goes.
MT
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