help 390 won't run right
Thread Starter
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Senior User
Joined: Nov 2004
Posts: 240
Likes: 0
From: Appleton, WI
help 390 won't run right
this engine is a 390 in a 1964 galaxie 500XL. It all started in the middle of a burnout, It was running fine, and then it just started running terrible. I got it back home but it stalled at every stop sign if i didn't put it in neutral and play with the gas (its an automatic) Checked timing, it was were it always was,factory carb. is good and i ran it with a 600cfm holley off my truck and it ran the same, terrible. bought a new distributor ran the same. The fuel pump is good. Seems to me the fuel and ignition systems are good, Any thing else to check, or should i start taking it apart. Almost seems like valve train. Any thoughts are welcome, Thanks
Posting Guru
Joined: Aug 2005
Posts: 1,036
Likes: 1
From: NE Ga
Originally Posted by piperig78
It all started in the middle of a burnout
.
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Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Anything beats a ventilated block.
Go simple/cheap first and pull your covers
and check pushrods for straightness, for
broken springs.
If all's good I would do a differential compression
check. When aired up you'll know your problem real quick.
What were ya turning when said problem occured?
Go simple/cheap first and pull your covers
and check pushrods for straightness, for
broken springs.
If all's good I would do a differential compression
check. When aired up you'll know your problem real quick.
What were ya turning when said problem occured?
Cargo Master
Joined: Apr 2004
Posts: 2,574
Likes: 4
From: Golden, CO
I'd start with vacuum and compression, no cost for valuable information. If you have to buy the test equipment, at least it's re-useable. Now that I think about it, I probably have less than $50 in both sets. Had them for years, now I need a gauge for EFI pressures.
