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What would cause engine backfire even after all new ignition components have been replaced most emission components have been replaced and most fuel components have been replaced?
Shawndouthit9
Would like more info such as the year, make, model, engine and if it is back firing through the throttle body (or carburetor) or the exhaust and at what point does it back fire (accelerating, decelerating, cruising, etc).
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∙ 11y ago
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1974 pickup 390 mtr has been converted to electronic ignition The ignition fried Replaced ignition and coil Ignition switch is good but still no spark Can anyone help?
You'd have to describe the components you replaced. Did you use a plug and go all in one distributor or did you replace the coil, distributor, and add an electronic ignition unit? If you "fried" your ignition, it's likely you fried something else along the line too. Check all your components.
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