Crank but no start

[TheGreatRusky]

2007 Mustang GT, stock. 188,000 miles.

I just finished replacing timing chains, guides, and tensioners. While I was in there, I replaced several different sensors. Everything went back together just fine, but now I can’t start it.

It turns normally and almost starts, but then won’t.

The plugs are firing and it seems to have fuel pressure. No codes are coming up.

Has anyone dealt with something like this before?

 

[Dino Dino Bambino]

As a general rule if the car was running fine before you worked on it and isn't running fine now, it's almost certainly something you've done that's caused the problem.
Try working backwards examining all the work you've done, especially electrical connectors, to make sure you haven't missed something important.

 

[JC SSP]

Engine needs three things to run: Air, Fuel and Spark.

Is there any popping when trying to start? Did you use OEM parts?

Double check everything is connected correctly. If worse comes to worse pull the valve covers off and check the timing marks are in the appropriate locations.

 

[07 Boss]

What sensors did you replace? Crank or cam position sensors would effect timing.

Have you double checked your timing chains still line up as installed?

 

[moooosestang]

Make sure you plugged the crank sensor back in! it's right by the AC compressor.