Odd hesitation

[73K20]

After it evened out I had to slow to 50. Floored it in 3rd pulled fine to about 58 then all power dropped off. Still seems to run fine under 40


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[73K20]

Timing gun you should check the timing

Sent from the dust in front of you!

Ill give it a shot. Why would the timing be jacked all of a sudden?


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[73K20]

Driving around 50 it just sounds like its missing and smells funny.


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[350runner]

Could of been off all Along out the distributor could of been loose and moved. Did you say there was no fuel filter?

Sent from the dust in front of you!

 

[73K20]

Sorry so much posting. I was trying to keep it steady at 45 and it started pooping like crazy. Letting off more gas nothing helped. More gas made it pop more though. Just no power at all.


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[350runner]

Spark plugs what are their condition?

Sent from the dust in front of you!

 

[73K20]

It's def not loose. And I don't understand why it would run fine in lower speeds and not higher if it was timing? It sounds perfectly normal in lower speeds. I've never come across a problem like this myself.
I have 2 fuel filters one in the carb and one before the carb


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[73K20]

Spark plugs what are their condition?

Sent from the dust in front of you!

Day old


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[73K20]

Not sure if this is significant. I'm on the side of the road, thought I'd pull the filter inside the carb see what happens. I pulled the full line and it sprayed fuel everywhere. There was alot of pressure in the line and I don't recall it ever having done that before.


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[350runner]

What brand?

Sent from the dust in front of you!

 

[73K20]

What brand?

Sent from the dust in front of you!

Ac Delco I believe I put them in yesterday with everything else and no help


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[350runner]

Ok cool. So you pulled the fuel line while it was running?

Sent from the dust in front of you!

 

[73K20]

Ok cool. So you pulled the fuel line while it was running?

Sent from the dust in front of you!

No def not while it was running


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[73K20]

I'm generally pretty good with my trucks and troubleshooting. I've worked in a couple shops even. But this has got me stumped. I know I'm missing something but I just can't fig it out.


1993 F250 3k in the 460-my 1st truck
1973 K20 6" lift-bright future
1967 F250 2x4-diesel swap in its future

 

[rich weyand]

How old are the rubber parts of the fuel line. Some people have reported on forums where the line collapsed at high flow rates, or there were loose pieces flapping inside that acted to clog the line at high flow rates.

Having fuel pressure when the engine is not running makes me wonder about fuel tank venting. Does yours have vent lines? If not, is the cap vented?