My son has a 1978 Ford pick up with 400 small block, when you hook up the #4 plug wire it starts backfiring and running poorly

Asked by jasoncordry Feb 03, 2015 at 02:56 PM about the 1978 Ford F-100

Question type: Maintenance & Repair

He just changed wires,plugs,cap and rotor

157,435

Bob answered 9 years ago

It may have a burned or bent valve or the plug wire might be on the wrong connector at the distributor cap.

Mark helpful

Your Answer:

My son has a 1978 Ford pick up with 400 small block, when you hook up the #4 plug wire it starts backfiring and running poorly 1 Answer

He just changed wires,plugs,cap and rotor

1978 Ford F-100

-

Maintenance & Repair
I have a 302cu engine in my truck I am the 2nd owner it has over 100,000mls. I replaced everything under the hood and replaced the points with pentritox ignition. One day it would not start it flooded 5 Answers

I replaced the plugs replaced both gas filters go to start it and it floods again. So I decided to rebuild the 2bbl carburetor. The engine takes along time to start once running cold or warm if I l...

1972 Ford F-100

-

Maintenance & Repair
I have a 67 F-100 with a 390. I am experiencing an intermittent but annoying problem. The truck will start right up most times don't need to touch the gas pedal. The truck runs for say 10 minutes (this varies) then shuts off like I turned off the key. Sotimes it will start right up and other times I have to hold the gas to the floor. Then the game is on. It will stall and I will get stranded. The truck was put up for the winter & I just took it out. It started right up and after letting run for a few minutes I drove it home about 65 miles. No problems at all. 2 days later I go out starts right up go 2 miles stop for gas and it shuts off before I can turn it off. I have had issues before when it gets hot and it will stall and then not start. Please help. 3 Answers

Truck has holly carb 4 barrel on an edelbrock manifold. Cast iron headers

1967 Ford F-100 Ranger

-

Maintenance & Repair
My 1971 Ford F100 has been stored for a year and today when I tried to start it all I got was a "clicking sound. I replace the solenoid but it would not kick the starter in. Any ideas?? 2 Answers

I think it has to original voltage regulator. I is not getting "juice" to the starter---at least I couldn't hear any sounds like it was trying to engage. It has 83000 actual miles ( my Dad bought ...

1971 Ford F-100

-

Maintenance & Repair
My 1972 Ford F100 1 Answer

My truck will start up perfectly fine and drive but when it starts to get a little warm it shuts off when you take off and when you take your foot off the gas pedal does anyone know what What is w...

1972 Ford F-100

-

Maintenance & Repair

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.