Monday, April 27, 2026

Initial Maintenance - Ignition Timing, TPS, & Ignition Review

I drove the Mustang to work for the first time today.  As of arriving home this afternoon, I've put 110 miles on it since finishing the interior under a week ago.  


I'm learning a fair amount about the car from driving it.  The front wheel contact with the control arms when at the extremes of turning is very annoying.  It sounds like you are completely grinding off the rim with the turn.  Beyond that, the plastics make alot of noise, the radio isn't too great, and I can feel a clunky type feel to the rear axle likely due to the bushings.  Otherwise, I'm enjoying driving the car.  

After arriving home for the day, I decided to check the ignition timing.  I disconnected the SPOUT connector which appears to have never been touched and is still taped to the rest of the harness.  When I then checked the timing, it was at exactly 8 degrees.  I decided to increase it to 11 degrees as that seems safe despite many running 12 to 14.  If I find this has any negative impact, I can easily change it back.


I then checked the TPS and found it had a solid voltage reading of .81 with the throttle closed.  If this reading is between .75 and .98, then you are within acceptable limits.  I didn't expect to find anything off here as the car is running well but it is worth checking while I'm checking a few things.

I then pulled a spark plug and found the previous owner installed Motorcraft AGSF2C plugs.  That one test plug was properly gapped so I don't feel compelled to check the rest of them.  The spark plug wires are quite nice, thick, and securely connect to the spark plugs.  I then checked the cap and rotor and they are new Ford Motorsport parts too.  I didn't expect to find anything wrong here either but it is one of those things you feel better about once you have put your eyes on it.  

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