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We bought a 1992 pontiac bonneville, 65,000 miles on it. Changed spark plugs and new battery. Changed the IGN Module and IGN coil. Still doesn't start.

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  • Pontiac Master
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Make sure battery has a full charge. If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
Any applicable trouble codes? Your obd1, you should be able to check some codes, yourself, if there are any.

Posted on Apr 30, 2017

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We bought a 1992 pontiac bonneville. It doesn't start. Changed the spark plugs, new battery. Changed the IGN module and IGN coil. still won't start.


What's missing ? Does it have spark ? Pull a plug wire off the vehicle an see if it has spark ! Buy a fuel pressure gauge an hook it to the schrader valve on the fuel injector rail . Is there fuel pressure ? Does the engine have compression ? No Start Diagnostic Basics EricTheCarGuy

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If a spark has no path to discharge, it will often find a weak one or create one. If your wires or plugs are so bad that they cannot pass a spark, the coil will discharge elsewhere. It is a great coil. I have seen brand new plugs completely disable an engine. Completely. I have seen wires completely fail on their maiden voyage. The plugs were Champion BRF52 on a Ford, the wires were Belden for a V6 Mercury. I do not recommend Champion plugs, at all. I do however like Belden quality. You would not suspect them, but... Suspect them. Pull one out lay it on a steel part of the engine, and see if it sparks. If not, replace them. For wire, try to start the engine at night, watch in the dark for arcing wires. Replace them.

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The spark plugs receives power to spark from coil pack.Check the power at the coil pack and also check the voltage at the coil pack with meter.If the coil pack shows proper power as well as voltage then its fault in spark plugs.Otherwise its faulty coil pack.The coil pack receives power from battery.so also check the voltage of the battery it should be exact 12 volt.
If the battery shows low voltage then the battery needs to be re-charged.
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Thanks. you can rate this solution and show your appreciation.

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