stumbling when on propane - Ford Truck Enthusiasts Forums

Go Back   Ford Truck Enthusiasts Forums > Misc. > Alternative Fuels, Hybrids & Mileage
Log In 

stumbling when on propane

LinkBack Thread Tools Search this Thread
Old 06-10-2007, 11:25 PM
gungho351's Avatar
gungho351 gungho351 is offline
Senior User
Join Date: Apr 2005
Location: Gillette, wy
Posts: 204
gungho351 is starting off with a positive reputation.
stumbling when on propane

I've got my 73' ford with a 390 running on duel fuel, propane and gas. It runs great on gas, but when you switch it to propane, it stumbles. It will only do it right off idle while under a load. It acts like it is running out of fuel, or not gettng enough fuel. It runs great at every other rpm. I just rebuilt the mixer and its got a good regulator on it. I've tried adjusting timing, and the power valve, and i've messed with the idle mixture, but nothing helps, maybe someone on here has an idea what is going on with it. Its got an Impco model E rugulator and Impco mixer.
2000 F350 XLT Supercab Longbox,7.3L powerstroke 4" exaust, 6637 air filter, 6.0 IC, 35 inch tires, 4.30 gears, BB turbo
Reply With Quote
Old 06-15-2007, 02:48 PM
gasman6674's Avatar
gasman6674 gasman6674 is online now
Posting Guru
Join Date: Apr 2002
Location: Greenwood In. USA
Posts: 1,094
gasman6674 is gaining momentum as a positive member of FTE.
Is it a Imperial 300? Or is a imperial 300 50/70 (it will be marked in the top cover) If its a plain ole 300 it isnt really big enough for that 390. But either way ther is a load screw in the side of the elbow try it full rich and see if that helps. Also make sure you do not have any air leaks like a missing gasket between the carb and adaptor or a cracked hose
Jim England
Do you have Gas?
2015 F350 6.2L RWD CCLB 4.30 Dually Vermilion Red
2015 Explorer XLT Tuxedo Black FWD, 2012 Ridgeline by Yellowstone Fifth Wheel, (For Sale 1996 F350 7.3L CCLB DRW)
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
propane performance kenjh Alternative Fuels, Hybrids & Mileage 12 05-11-2010 11:29 AM
Multi-tank propane conversion questions packlet Alternative Fuels, Hybrids & Mileage 5 02-24-2010 04:17 PM
Propane / Dual Fuel Question. pwrdbyjp Alternative Fuels, Hybrids & Mileage 2 07-14-2006 02:30 AM
Impco 225 Adjustment 351M Alternative Fuels, Hybrids & Mileage 6 06-01-2005 03:02 AM
Propane Engine backfiring. Help SAUKA Fuel Injection, Carburetion & Fuel System 0 03-23-2004 06:50 PM

Go Back   Ford Truck Enthusiasts Forums > Misc. > Alternative Fuels, Hybrids & Mileage

300, adjustment, buy, carburetor, idle, imperial, mixer, propane, regulator, screw

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

All times are GMT -5. The time now is 01:30 PM.


Advertising - Terms of Use - Privacy Statement - Terms of Service - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup