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Check your fuel injectors first. If you have a DVOM, check the ohms on your fuel injectors before and after startup. There should be a consistent number across all injectors.
Sorry, it’s been a while. The Mustang is up and running and FIXED. I think this entire deal was a domino effect. The source being a failing fuel pump. My theory is this that the fuel pump began failing, therefore causing the spark plugs to eventually lose their integrity, getting worse by the day. My camshaft synchronizer had a really bad wobble to it, but never chirped. Went ahead and replaced that as well. Runs MUCH better now.
Now I just need to take care of a rear main seal and transmission leak.
For a minute there I didn’t think that I’d get this car back.
Thanks for your time!
Thanks again. I discovered something this evening while inspecting the camshaft synchronizer… The magnet that sticks into the camshaft position sensor had fallen out right into the camshaft! Also, the camshaft had a lot of play, where the interrupter had a wobble to it. I read that these are a bit common in these type of Fords.
Here is the vacuum gauge pinpoint test I did a while back. I did a bit of research, and this indicates that it could be retarded ignition timing?
Thanks for the reply jkreutzer!
So, I’m going to go ahead and call myself a big noob for doing this. I’ve been doing everything ass backwards with this vehicle. This is/was my most challenging diagnosis, and it all just threw me for a loop.
I basically thought that perhaps the issue was a bad valve because of what my vacuum test indicated. I took the vehicle apart, all the way down to the cylinder head and found nothing wrong. But in hindsight, I didn’t check the regulator, and didn’t care to think that the exhaust could possibly have been the issue. I was a bit overtaken by other variables, so much that I ignored it. This has been a huge lesson.
Timing components are fine, valves have been tested at a shop, and nothing seems wrong. Once I put this piece of work back together, I will check out the fuel regulator.
In the meantime, here’s a video of what the car sounds like. Ignore the whining noise coming from the power steering!
