Intermittent no start
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Freshman User
Joined: Jan 2020
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Intermittent no start
Hi guys my 1993 f250 with 168k miles on a 351 Windsor has just developed an issue that it doesn’t start for a good try or two. Cranks perfectly fine and strong, but no start. Few tries later it starts and runs perfectly fine. It might have something to do with it being cold in the morning but it hasn’t been happening long enough to determine that, any thoughts on what might be going bad, things to start replacing? Thanks.
Laughing Gas
Joined: May 2009
Posts: 854
Likes: 49
From: Maine
I understand waiting for it to happen, and, then trying starter fluid...drags out the diagnosis process. But, I can tell you from experience...replacing parts to deal with an intermittent un-diagnosed problem is not such a good idea.
You check for OBD codes?
Roy
You check for OBD codes?
Roy
Lead Driver
Joined: Jan 2019
Posts: 5,083
Likes: 868
From: N.W. Alabama
check your fuel pressure with gauge
Part 1 -How to Troubleshoot a No Start (Ford 4.9L, 5.0L, 5.8L).
Part 1 -How to Troubleshoot a No Start (Ford 4.9L, 5.0L, 5.8L).
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Cargo Master
Joined: Oct 2011
Posts: 2,251
Likes: 306
From: Kenner,La.
Hard start
If your engine has the crank sensor in the timing cover try un plugging the wire going to it and clean the terminals then try to tighten the spade connection. I had a CV that acted that way and that was the cause, it was covered with oil and dirt.
Can you hear the fuel pump cycle for the 2 seconds when you turn on the ignition? Get a test light and probe one of the injector connections to see if they are getting a signal on the negative side when cranking and also check if there is a spark coming out of the coil while cranking.
Hope this helps
Can you hear the fuel pump cycle for the 2 seconds when you turn on the ignition? Get a test light and probe one of the injector connections to see if they are getting a signal on the negative side when cranking and also check if there is a spark coming out of the coil while cranking.
Hope this helps
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Joined: Nov 2011
Posts: 1,823
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From: New York
Any idea if the TFI and PIP (inside distributor) are still the originals? If yes, it wouldn't be a terrible idea to replace them and know that you have fresh new ignition parts - the two parts that most commonly fail and could leave you stranded when they do.
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