I've done a bit of research but most of the threads a bit old so wanted to see if new ideas where "developed" since then
94 D90 3.9L V8 R380 w/ Mallory Dizzy
When engine is cold, no problems.. starts and runs smooth as a baby's butt... (with chicken pox that is)
As I get stock in traffic.. being from DC that's likely to happen at 3am as it is at 5pm...
As the engine gets hotter, the rougher the start off becomes. As in put her in 1st gear and I have to rev it up more to cause it from stalling since she sputters and the truck just jerks hard until revs go up. But once rolling, no issues. If i'm stuck too long in traffic, and I stall her, then she won't turn on until I wait a good 10-15 minutes.
When this symptom starts, if I just rev the engine, absolutely no problems.. it's only when I try to drive off... so basically when the load is on her to move.
Since I'm able to gas it in neutral and it shows no signs of dying, that is throwing me off... So what am I missing?
The engine never gets hot enough to show red on the temp gauge... since my electric fan kicks in correctly at the right time
Some posts have found:
O2 sensor ready to fail
Do I just replace them?
Failing ignition module.. doesn't apply since I have a mallory distributor
Bad spark plugs?
Replaced 2 years ago, how often to replace these?
Bad mallory resistor? Bad cap? Bad coil?
Replaced all of them last fall when she wouldn't start after terrential downpour (different post)
Rebuild your Distributor and fresh plugs with the correct gap?
Distributor cap is new, but Plugs are exactly 2 years old
Sea-Foam every 2k?
Loose sparks plugs?
haven't looked at this yet to be honest :/
Thanks for any inputs