Does anyone have any ideas i have a 1969 mercury marquis 429 engine,i have replaced coil,distributor,altenater,voltage regulator,wires,plugs,fuelpump,the car runs great for 15 minutes then backfires and wont start again till its cold any ideas
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Does anyone have any ideas i have a 1969 mercury marquis 429 engine,i have replaced coil,distributor,altenater,voltage regulator,wires,plugs,fuelpump,the car runs great for 15 minutes then backfires and wont start again till its cold any ideas
Vapor lock?
David
Did you put new points & condenser in it???
Could be a bad condenser...joe
But also.........
From THIS PAGE
Prior to 1972, Ford used dual-point, mechanical-advance distributors in high-performance applications like the 390, 406, and 427 High Performance, the 289 High Performance, the Boss 302, 351, and 429 V-8s. In earlier applications like the 289, 390, 406, and 427 High Performance V-8s, the C5OZ-12127-E dual-point distributor was a mechanical-advance only for high-RPM use.
dose it backfire when you are running down the road or while idling???how about the fuel filter???2 or 4 barrel carb???