Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-11-2014, 01:31 PM   #1
drscott
Member
 
drscott's Avatar
 
Join Date: Dec 2012
Location: Kentucky
Posts: 37
Default Missing bad out on road.

30 PU is missing really bad when running on road. Idles good but won't hardly run while out on road. I've had a great model A gentleman help me all winter on this truck. I will get his thoughts next week. It acts like it is starving for gas. Got it home took off gas line, very little debris in bulb. But gas did not flow through line very good.

Any thoughts would be greatly appreciated.
drscott is offline   Reply With Quote
Old 05-11-2014, 01:45 PM   #2
Fred K-OR
Senior Member
 
Fred K-OR's Avatar
 
Join Date: May 2010
Location: Stayton, Oregon
Posts: 3,806
Default Re: Missing bad out on road.

Check your point setting.
__________________
Fred Kroon
1929 Std Coupe
1929 Huckster
Fred K-OR is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-11-2014, 02:01 PM   #3
BILL WILLIAMSON
Senior Member
 
BILL WILLIAMSON's Avatar
 
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,560
Default Re: Missing bad out on road.

First you gotta' find why WHY the gas is not flowing well! With gas line off at carb, Minerva would flow a 5 to 6" stream, with only 1/2 tank of gas!
It's just a simple process of elimination.---Bill W.
__________________
"THE ASSISTANT GURU OF STUFF"
BILL WILLIAMSON is offline   Reply With Quote
Old 05-11-2014, 02:08 PM   #4
V8COOPMAN
Senior Member
 
V8COOPMAN's Avatar
 
Join Date: May 2010
Location: East Shore of LAKE HOUSTON
Posts: 11,184
Default Re: Missing bad out on road.

Forget that "point setting" stuff for now. Like Bill W. said above, find out why the fuel is not flowing. With that line disconnected, blow some compressed air BACKWARDS thru that line to possibly dislodge some crud at line/tank. If it flows better, you've found problem. Use all these little clues to your advantage. DD
__________________
Click Links Below __


'35-'36 W/8BA & MECHANICAL FAN


T5 W/TORQUE TUBE
V8COOPMAN is offline   Reply With Quote
Old 05-11-2014, 02:41 PM   #5
drscott
Member
 
drscott's Avatar
 
Join Date: Dec 2012
Location: Kentucky
Posts: 37
Default Re: Missing bad out on road.

Took off gas line. Took off bulb no dirt in bottom. Put bulb back on and it took about 1 to 2 seconds to fill up. Getting ready for test drive again.

Points are ok.
drscott is offline   Reply With Quote
Old 05-11-2014, 02:43 PM   #6
Fred K-OR
Senior Member
 
Fred K-OR's Avatar
 
Join Date: May 2010
Location: Stayton, Oregon
Posts: 3,806
Default Re: Missing bad out on road.

Sponsored Links (Register now to hide all advertisements)
Is the miss just one miss every now and then or does it start missing and it feels like it is ready to die off completely?
__________________
Fred Kroon
1929 Std Coupe
1929 Huckster
Fred K-OR is offline   Reply With Quote
Old 05-11-2014, 03:16 PM   #7
drscott
Member
 
drscott's Avatar
 
Join Date: Dec 2012
Location: Kentucky
Posts: 37
Default Re: Missing bad out on road.

Same thing. Missing real bad as soon as it get a load on it. Did a quick check of the timing. Seems to be ok. Again, starts right up and idles perfect.
drscott is offline   Reply With Quote
Old 05-11-2014, 03:46 PM   #8
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Largo Florida
Posts: 7,225
Default Re: Missing bad out on road.

Take fuel line out of carburetor and watch the flow. As Bill said, it should flow fully and not stop or slow down.
The line into the carburetor should extend beyond the ferrule by more then a 1/16" or so.
Make sure the gas cap vent is doing its job. When this monster starts running poorly just loosen the gas cap and see if that helps.
Does this monster run OK at lower speeds and just start running poorly at higher speeds ?
If this doesn't help, maybe the carburetor will have to come apart.
I'd work on the fuel system before fooling around with some electrons.
Patrick L. is offline   Reply With Quote
Old 05-11-2014, 04:24 PM   #9
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
Default Re: Missing bad out on road.

It takes higher voltage to fire the plugs under load than when idling. Hold the coil wire 1/4" to 1/2" from a head nut and check for a hot blue spark. My original slant pole coil will easily throw a 1/2" blue spark.
Tom Wesenberg is offline   Reply With Quote
Old 05-11-2014, 04:26 PM   #10
700rpm
Senior Member
 
700rpm's Avatar
 
Join Date: May 2010
Location: Portland, Oregon
Posts: 6,039
Default Re: Missing bad out on road.

If not fuel flow, then condenser.
__________________
Ray Horton, Portland, OR


As you go through life, keep your eye on the donut, not the hole.
700rpm is offline   Reply With Quote
Old 05-11-2014, 05:39 PM   #11
fiddlybits
Senior Member
 
fiddlybits's Avatar
 
Join Date: Jan 2014
Location: N Illinois
Posts: 447
Default Re: Missing bad out on road.

Point gap
Point gap
Point gap

Classic symptoms.

Been there. The point gap is too small. Symptoms makes you think it is fuel.
(Less likely but it could also be a bad condenser.)
fiddlybits is offline   Reply With Quote
Old 05-11-2014, 06:52 PM   #12
Fred K-OR
Senior Member
 
Fred K-OR's Avatar
 
Join Date: May 2010
Location: Stayton, Oregon
Posts: 3,806
Default Re: Missing bad out on road.

Quote:
Originally Posted by fiddlybits View Post
Point gap
Point gap
Point gap

Classic symptoms.

Been there. The point gap is too small. Symptoms makes you think it is fuel.
(Less likely but it could also be a bad condenser.)
I would tend to agree but I am no expert.
__________________
Fred Kroon
1929 Std Coupe
1929 Huckster
Fred K-OR is offline   Reply With Quote
Old 05-11-2014, 07:04 PM   #13
BlueSunoco
Senior Member
 
Join Date: Sep 2013
Location: Windy City
Posts: 1,003
Default Re: Missing bad out on road.

Point gap an easy check do that and then make sure that the ferrule on the gas line into your carb is not set too far back from the end of the line......if it is and your fuel line is 'into' the carb too far then you will have a gas starvation problem it is blocking the fuel flow.

Happened to me years ago.
BlueSunoco is offline   Reply With Quote
Old 05-11-2014, 07:07 PM   #14
zzlegend
Senior Member
 
zzlegend's Avatar
 
Join Date: May 2010
Location: Reseda, Calif.
Posts: 2,191
Default Re: Missing bad out on road.

I agree with V8COOPMAN. If your stream is very weak,,,,i am talking about your fuel stream,,,Then maybe small debris or rust blocking your tank drain at fuel line.
zzlegend is offline   Reply With Quote
Old 05-11-2014, 07:22 PM   #15
1crosscut
Senior Member
 
1crosscut's Avatar
 
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 2,011
Default Re: Missing bad out on road.

As in post #7 pull the fuel line off at the carb and blow some compressed air back up into the tank to clear things out. Make sure your fuel system is right before you start on the electrical side of things.
__________________
Dave / Lincoln Nebraska
1crosscut is offline   Reply With Quote
Old 05-11-2014, 08:28 PM   #16
bikejunk
Senior Member
 
Join Date: Oct 2012
Location: beautiful down town Passaic NJ
Posts: 293
Default Re: Missing bad out on road.

you can also run a piece of wire thru the line if its old it could have a lot of crud in it . if it starts to "starve for fuel what happens if you pull the choke rod when it happens?
bikejunk is offline   Reply With Quote
Old 05-11-2014, 09:12 PM   #17
KGBnut
Senior Member
 
KGBnut's Avatar
 
Join Date: Jul 2011
Location: Southwestern Connecticut
Posts: 934
Default Re: Missing bad out on road.

This may sound crazy, but check the spring tension on your points. I had the springy part of my points break once. The thin copper conductor had just enough springiness to close the points at idle. Once I was moving at speed, however, the points would float like crazy and you can imagine how lousy it ran.

It took me a long time to find the problem. The points looked normal when I was troubleshooting. I didn't notice until I manually pulled the points open and notice how there was so little tension. Then I noticed the little piece of broken spring.

Good luck!

Ken
__________________
Style beats speed any day, and with a lot fewer tickets.
KGBnut is offline   Reply With Quote
Old 05-11-2014, 09:28 PM   #18
Phil
Senior Member
 
Phil's Avatar
 
Join Date: May 2010
Location: Bethany, Ok
Posts: 384
Default Re: Missing bad out on road.

Where the fuel makes a 90* turn in the shut off valve very fine sediment get packed in. Pull the fuel line off at the carb, hook a hose on, and drain the fuel into gas cans. If the fuel valve is packed may take hours. Then remove the fuel valve clean the gunk out install a pencil filter and motor happy.
Phil is offline   Reply With Quote
Old 05-11-2014, 09:53 PM   #19
Mike V. Florida
Senior Member
 
Mike V. Florida's Avatar
 
Join Date: May 2010
Location: Florida between Sarasota and TampaSouth Florida
Posts: 14,054
Send a message via AIM to Mike V. Florida
Default Re: Missing bad out on road.

Quote:
Originally Posted by KGBnut View Post
This may sound crazy, but check the spring tension on your points. I had the springy part of my points break once. The thin copper conductor had just enough springiness to close the points at idle. Once I was moving at speed, however, the points would float like crazy and you can imagine how lousy it ran.

It took me a long time to find the problem. The points looked normal when I was troubleshooting. I didn't notice until I manually pulled the points open and notice how there was so little tension. Then I noticed the little piece of broken spring.

Good luck!

Ken
That was my thought as well.
__________________
What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II
Mike V. Florida is offline   Reply With Quote
Old 05-11-2014, 11:46 PM   #20
Brentwood Bob
Senior Member
 
Join Date: May 2010
Location: brentwood, ca
Posts: 4,420
Default Re: Missing bad out on road.

Does the motor speedup from idle when you force it wide open? Or does it crap out? Bob
Brentwood Bob is offline   Reply With Quote
Reply


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 Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 03:17 PM.