Stalling car

LANTHONY20

MEMBER
1972 LINCOLN MARK IV
V8
2WD
AUTOMATIC
57,000 MILES

I have a 1972 Lincoln Contental Mark IV. Lately it stalls after short drives or after driving on the freeway at sustained speeds and then when slowing down. Seem to starve for fuel. I've changed from vented to unvented gas caps as a first try. No change in condition. Still stalls out. Sometimes it re-starts and others it has to sit in order to restart.

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

https://www.2carpros.com/articles/car-cranks-but-wont-start

Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing
belt/chain.