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Re: OT, Pontiac Bonneville
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Posted by Allan in NE on September 08, 2004 at 03:42:34 from (148.78.243.24):
In Reply to: OT, Pontiac Bonneville posted by Mattchew on September 07, 2004 at 18:12:04:
Mornin' Matt, It is just about impossible to diagnose that old gal "over the phone". Are you getting a 'check engine' light? Are your fuel and air filters in good shape? Could be a faulty fuel pump, wobbled out Idle Air Control, worn TP switch, wobbled out injectors, who knows? You don't use ethanol do you? The early ones could not stand up to ethanol use and cost many an owner a set of injectors. Could be a bad ignition switch, ignition module, a bad temp switch to the ECM or even the ECM itself. Could even be defective O2 sensors or their heaters. They don't use a single coil; and depending on the year, they use what they call a "coil pack" (3 coils in one unit), which is fired by the ignition module. The newer ones use a different coil for each plug and totally eliminate the plug wires. Or, it might even be a simple thing like just needing a set of plugs. The last one that I worked on that was doing what you describe, came from over in Wyoming and reached me after the owner had sent it to every garage he could think of to get it repaired. That one ended up having the wrong ECM, which was calibrated for California, installed somewhere along the line. Your best bet is to take it to someone who can plug 'er in to a scanner and read the numbers and see what is going on with that guy. Hope ya get ‘er goin’, Allan
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