1975 Ford F350 Intermittent engine stop

Tiny
PRIVATEPILOT
  • MEMBER
  • 1975 FORD F-350
  • V8
  • 2WD
  • MANUAL
  • 47,000 MILES
I suspect the ignition section and need a schematic of the associated system.
I've cleaned all the connectors and occasionally can tap the connector area and the engine stops but it is intermittent.
Today I can not get the engine to start using all the normal tricks after changing the oil and filter.
If you know of a source of a detailed wiring schematic, I would appreciate it.
Thanks, PP
Do you
have the same problem?
Yes
No
Tuesday, April 27th, 2010 AT 8:24 PM

6 Replies

Tiny
MERLIN2021
  • EXPERT
Check your email, but this normally turns out to be either the ignition module, or distributor.
Was this
answer
helpful?
Yes
No
Wednesday, April 28th, 2010 AT 2:06 PM
Tiny
PRIVATEPILOT
  • MEMBER
I'll be installing a 'new' ignition module tomorrow. I'll let you know if it helps. PP
Was this
answer
helpful?
Yes
No
Thursday, April 29th, 2010 AT 8:19 PM
Tiny
MERLIN2021
  • EXPERT
I'll check back in.
Was this
answer
helpful?
Yes
No
Friday, April 30th, 2010 AT 1:59 AM
Tiny
PRIVATEPILOT
  • MEMBER
The F350 Ford truck passed a driving test today with the new ignition module. $22

One 'problem' remains: the temperature display has quit during this ignition repair. I've reinstalled a section of suspicious wire near the sender. The sensor resistance varies directly with increasing temperature ( 300 - 600 ohms). The voltage to ground of the sensor wire removed from sensor fluctuates from 1 to 8 VDC. Next step is to trace the wiring and clean the connector at the engine side of the firewall.

If anyone knows the normal voltage at this wire, I'd enjoy hearing it.

I ran out of time today.

Thanks, PP
Was this
answer
helpful?
Yes
No
Friday, April 30th, 2010 AT 3:22 PM
Tiny
MERLIN2021
  • EXPERT
Engine size? 460? I would do a continuity check of the wire, if good either the gauge is NG or the sender, and it's going to be easier to find a new sender. I did try to get the info, but it's too old for my books! F series cluster has a IVR, or voltage regulator for the cluster, I dont know how any of these could have been damaged by replacing the module.I will email the cluster info.
Was this
answer
helpful?
Yes
No
Friday, April 30th, 2010 AT 7:50 PM
Tiny
PRIVATEPILOT
  • MEMBER
Engine is a 360 I was told and that number has been penciled in the glove box manual.

I do suspect the wiring since the temperature indication worked OK prior to my ignition troubleshooting.

It will take a few days to get back to the project. PP
Was this
answer
helpful?
Yes
No
Saturday, May 1st, 2010 AT 8:03 AM

Please login or register to post a reply.

Recommended Guides