Howdy!

It's been a while since I posted. My buddy has my 87 D150 and I'm trying to help him get it going.

A few weeks ago it started stalling all over the place, then sometimes not restarting at all. It would start cold, then warm up and stall when the choke came off. It needed a tune up already so we did a bunch of stuff to it, none of which helped. Here's the list:

-New cap & rotor. Has points distributor used to trigger an MSD 6a w blaster coil. Grounding the trigger wire produces a big hot spark from the coil wire.

-disassembled and cleaned the carb (1945)

-new vacuum lines and caps

-flipped the EGR

-compression test- none below 120 so probably not the timing chain or burnt valve or head gasket?

-new fuel pump and filter tests good

-fuel dryer/cleaner treatment in case of water in the gas

-when it stalls sometimes it will restart, sometimes won't even run on starting fluid

-I didn't verify TDC on the damper and the truck has one of those little tunnels you look through to see spark advance with the light instead of just a pointer but it looked like just above 10° at a high idle which should be fine.

We're stumped. The ignition is run througb a kill switch seperate feom the key so it is super simple and the MSD boxes in my experience either work or don't and this one tests good. He ordered points today but they shoild last for a looong time just acting as a trigger for the msd box. If it was a cracked manifold or vac leak then it might not run without choke but should still run on ether. The floats were floating fine when I rebuilt the carb.

Today when we warmed it up it stalled and actually restarted but gave a backfire out of the carb spraying gas in the air. (A clue?)

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madam im adam

I had the exact same problem with my 74 Dart. Put the original coil back on and see if you have the same issue. Your blaster may be too much for your app.