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 06-04-2019, 09:29 PM   #1
JDD_0485
Junior Member
 
Join Date: Jun 2019
Location: Illinois
Posts: 8
Default 1930 Model A. Runs great for about 15 minutes

Hi. New to Model A's. Engine has new coil, points, recently added thermostat, no bubbles in water at any rpm, machined head, new gasket, & rebuilt carburetor. Will run fine, great power, after about 15 to 20 minutes it backfires once, sputters, loses power. Pulling choke keeps it going for a while, can be restarted then immediately dies each time. No adjustments help. Coolant never gets above 170. Ideas? Thank you all in advance.
JDD_0485 is offline   Reply With Quote
Old 06-04-2019, 09:40 PM   #2
1955cj5
Senior Member
 
1955cj5's Avatar
 
Join Date: Apr 2015
Location: Boise, Idaho
Posts: 1,448
Default Re: 1930 Model A. Runs great for about 15 minutes

If your gas cap is not venting properly you may be developing a vacuum in the gas tank after running for a few minutes.

Next time it dies try loosening the fuel cap and see if it restarts for another 15 minutes or so.

The vents on the cap can be cleaned with spray brake cleaner, if you have the correct style vented cap.

If not check the vendors for a replacement.
__________________
Early '29 CCPU that had a 4-speed, but not any more.......in the family since '62
1955cj5 is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 06-05-2019, 12:23 PM   #3
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Upstate NY and western Florida
Posts: 5,569
Default Re: 1930 Model A. Runs great for about 15 minutes

I'm thinking the same as 1955cj5. Next time you drive just loosen the cap before you start off.
Patrick L. is offline   Reply With Quote
Old 06-05-2019, 01:11 PM   #4
JDD_0485
Junior Member
 
Join Date: Jun 2019
Location: Illinois
Posts: 8
Default Re: 1930 Model A. Runs great for about 15 minutes

Is vented. Had cap off many of the times it's done this and see filter is clean.
JDD_0485 is offline   Reply With Quote
Old 06-05-2019, 01:25 PM   #5
jw hash
Senior Member
 
jw hash's Avatar
 
Join Date: May 2010
Location: Auburn Washington
Posts: 2,217
Default Re: 1930 Model A. Runs great for about 15 minutes

repro, gas cap? gas cap not venting
jw hash is offline   Reply With Quote
Old 06-05-2019, 05:20 PM   #6
dansluck
Senior Member
 
Join Date: Dec 2014
Location: Nevada
Posts: 101
Send a message via AIM to dansluck Send a message via Yahoo to dansluck
Default Re: 1930 Model A. Runs great for about 15 minutes

Next time put your hand on the coil after the motor quits and see if it is hot. My car did this and I flipped the coil so that it was pointing up and drove it home, over 50 miles. good Luck
dansluck is offline   Reply With Quote
Old 06-05-2019, 06:55 PM   #7
rocket1
Senior Member
 
Join Date: Mar 2014
Location: Midland Park,N.J.
Posts: 966
Default Re: 1930 Model A. Runs great for about 15 minutes

Pulling the choke keeps it going for awhile,sounds like a fuel problem,when it dies take the fuel line off the carb and check for fuel flow.If it is a viton tipped needle and seat could be sticking closed not allowing carb bowl to fill.
rocket1 is offline   Reply With Quote
Old 06-07-2019, 10:46 AM   #8
DHZIEMAN
Senior Member
 
Join Date: Dec 2016
Location: Sunrise Beach, Mo
Posts: 387
Default Re: 1930 Model A. Runs great for about 15 minutes

Fuel flow problem from tank! as a check, remove gas line as rocket1 suggest and using air pressure, blow back in line to tank, just to see if rust gets moved away from tank outlet, and see how long the car runs.
DHZIEMAN is offline   Reply With Quote
Old 01-01-2020, 12:53 PM   #9
JDD_0485
Junior Member
 
Join Date: Jun 2019
Location: Illinois
Posts: 8
Default Re: 1930 Model A. Runs great for about 15 minutes

Timing gear slipped a tooth. Put an aluminum cam gear on
It runs fine now.
JDD_0485 is offline   Reply With Quote
Old 01-01-2020, 01:21 PM   #10
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Upstate NY and western Florida
Posts: 5,569
Default Re: 1930 Model A. Runs great for about 15 minutes

A bad timing gear caused it to run for awhile then quit ? Thats interesting.
Patrick L. is offline   Reply With Quote
Old 01-01-2020, 01:46 PM   #11
ronn
Senior Member
 
Join Date: Feb 2011
Posts: 3,876
Default Re: 1930 Model A. Runs great for about 15 minutes

I install pencil filters in every A gas tank.
ronn is offline   Reply With Quote
Old 01-01-2020, 01:55 PM   #12
wmws
Senior Member
 
wmws's Avatar
 
Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 659
Default Re: 1930 Model A. Runs great for about 15 minutes

Maybe if it was running retarded it got hot enough to effect the coil or condenser.
wmws is offline   Reply With Quote
Old 01-02-2020, 02:29 AM   #13
JDD_0485
Junior Member
 
Join Date: Jun 2019
Location: Illinois
Posts: 8
Default Re: 1930 Model A. Runs great for about 15 minutes

Am with wmws. During the time it was giving fits, it seemed everything was rather hot under the hood and though I didn't have an IR temperature gun on me, the water seemed to have neared the boiling point. Figured out what had happened when checking everything. Once I got to the timing, the timing pin was seated well, but the #1 piston was not at TDC when looking through the plug hole. Off came the timing cover and the slightly chewed cam gear was there to say "found me."
JDD_0485 is offline   Reply With Quote
Old 01-03-2020, 08:47 AM   #14
Brendan
Senior Member
 
Brendan's Avatar
 
Join Date: May 2010
Location: At my kitchen table in Santa Rosa, Ca
Posts: 2,763
Default Re: 1930 Model A. Runs great for about 15 minutes

condenser? i have seen them bad out of the box
__________________
If it would have been a snake it would have bit ya!

i can't spell my way out of a paper bag!
Brendan is offline   Reply With Quote
Old 01-04-2020, 03:53 PM   #15
Purdy Swoft
Senior Member
 
Purdy Swoft's Avatar
 
Join Date: May 2010
Location: Alabama
Posts: 7,814
Default Re: 1930 Model A. Runs great for about 15 minutes

Quote:
Originally Posted by ronn View Post
I install pencil filters in every A gas tank.

Same here , I consider the pencil filter a must .
Purdy Swoft is offline   Reply With Quote
Old 01-04-2020, 04:51 PM   #16
Jack Shaft
Senior Member
 
Join Date: Dec 2019
Posts: 406
Default Re: 1930 Model A. Runs great for about 15 minutes

Its a good practice when you have a fiber timing gear fail to drop the oil pan and clean the pickup screen.
Jack Shaft is offline   Reply With Quote
Old 01-05-2020, 07:06 PM   #17
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 1,887
Default Re: 1930 Model A. Runs great for about 15 minutes

I don’t see how a timing gear that’s jumped time can run strong and never get above 170. ( post 1). Then in post 13, it’s “close to boiling” and hot under the hood. I think your original problem is still there, and the timing gear was a later, second problem. Time will tell.
Chuck Sea/Tac is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 03:37 PM.