Random no start....

Jeff, a little follow up to your idea. Last night I washed and waxed the car all pretty like and went to move it and it didn't start again. Thought of your idea on the inertia switch so I went back to the trunk and reset it a few times. Car started up, SO, if the switch is bad or overly sensitive, can it be safely bi-passed? Looks to be a simple cut and solder type of bypass. What do you think?

Sure, you can bypass the inertia switch with no issues assuming you dont get into a crash that causes a major fuel leak with the engine still running that causes a fuel fire. When my inertia switch took a dump. I considered eliminating it from the fuel pump circuit, but decided it wasnt worth the risk if the car got hit in just the wrong way. The cost of a new switch is insignificant compared to my life and my wife's life.

I dont see an issue with bypassing it for a few days to see if the occasional no start condition goes away.

Yeah, kind of agree with you on that, I just checked RockA and they only have a universal AC delco switch listed. did you go to the dealer for a new one?

I seem to remember it was a dealer only item back 15 or so years ago, and not cheap. No clue if they are even available from the dealer anymore. Could check some of the online Mustang supply houses for one. You might get lucky.

I would think a generic one would work fine as long as it is securely mounted to the body of the car. I dont think its location is super important. The TC one is at the back trunk panel, the one in my 86 Tbird 5.0 is above the pass side rear wheel well, and a friend had a mid 80s Ranger and his (which also failed) was somewhere in the interior of the truck on the passenger side (dont remember exactly where).

I just checked Ebay..... there are a bunch of used and a few new Ford inertia switches relatively cheap. May have to fab up a mount and/or different electrical connections.