Runs but wont respond to the excellerator pedal

[allegro5]

1996 Dynasty. Now and then when we stop for a few minutes and restart, the engine starts but will not excilerate! In gear still no power although the thing is running. Stoping the engine and restarting a few time will fix the problem. What is wrong? allegro5

[RJay]

You might want to include a little more information about your rig such as engine size, etc. and you may get more responses.

What have you checked so far?

[allegro5]

In My case of the 1996 Dynasty with a Cummins 8.3! This rig has no Computer! I havent checked a thing as I have no idea where to start. The engine runs at temps that show fine and it runs smoothly. Just sometimes when I start the engine it will not respond to the accelerator. shortly it snaps out of it and does fine. Thanks for responding RJay, Allegro5

[Elkhartjim]

Your rig may not have a computer but its got an electric connection from the accelerator to the engine with relays, etc.

I would suggest two things.

If its on a Freightliner chassis I would ask a mod to move your post to the Freightliner group. This is a chassis issue not the box builders issue.

And, if its on a Freightliner chassis I would call Freightliner help at 1-800-FTL-HELP. Have the last 6 of your VIN number available. They can help you get started with a diagnosis.

[JimM68]

Frieghtliner?
This is a Monaco Dynasty, they only come with monaco's roadmaster chassis, he's in the right place, or certainly close enough.

No idea on your problem though, sorry.

[Phil R]

Had the same problem with mine. Changed both fuel filters "again" no change. So I finally changed the overflow valve on the injection unit. All the power was back and instant re-action to the accelerator. This has been discussed on this forum before, I'll PM you the linkto the supplier.

[allegro5]

Hi Phill R and friends! I changed the overflo valve a year ago. Got it on Ebay for $25.. Seems a small shop makes them and they are all Brass and purdy! Not so sure how good or how long they last. allegro5

[C-PHartley]

I had a similar problem with my Cummins C 8.3 occasionally. I found the Pac Brake sticking once in a while. Turning off the ignition would clear the problem until it happened again. Lubing the Pac Brake and working it by hand until it worked freely resolved my problem. I hope this helps.

[jimkate]

Here's one thing you can check. You'll have to lift the bed up to look at things under there.

There's an electric box fastened on the front firewall with a cable coming out of it running down to the engine. It connects to a swivel lever, and that swivel lever connects to the fuel injection pump. The swivel lever has a couple of return springs on it.

It's common for that swivel lever to become so rusted that the electric control box can't move it. Spraying a little oil on it and working it free usually solves the problem.

[Phil R]

allegro5
I'm curious, did you find the problem? Let us know when you do.

[allegro5]

Thanks Guys, I havent had a chance to retry anything! I did oil the Pac and I will oil the link to the fuel pump as Canada Jim said. We Leave Vermont and head to Florida about the first of Oct. and I will see then what Happens! You guys are alot of help! Thanks, allegro5