Car Lost ~50hp, Suggestions Welcome

[Swarzkopf1]

Went to the track last night looking for 12s. My best ET to date is 13.34 and my best MPH is 104.90. This time and MPH were obtained in ~75* weather in clear conditions, the exact same as last night.

So as to my runs....I gained.8 on my ET and lost 7mph. At this point, I have no idea why. My best run last night was the first one, with a 1.9 second 60', which felt strong, followed by a 14.1 second 1/4 mile at 98mph. WHAT THE ****. I didn't blow anything up, didn't overheat, don't hear any tell-tale noises from my block, and the car in general still accelerates and drives normally. Hell, it still feels as fast as it did when I ran 13.3@105, it just isn't. I made three runs, 14.1@98, then 14.2@96, then 14.4@96.

As I said, there are no tell tale signs. The car is running smoothly, not burning oil or coolant, not making any goofy noises, ect. According to the MustangWorks calculator, I'm down 50hp.

Here are the changes made to the car between last time at the track (13.3@105 and this time 14.1@9 :

160* Thermostat installed
New lightweight Summit seats installed, old seats yanked
Sound deadening and carpeting removed from interior

That's it...nothing I can see that would take away 50hp.

I tested my nitrous system this morning and it's spraying as it should. There is a slight leak where the injection nozzle meets the intake tube, but I don't think it's a 50hp leak.

Also, my coolant temperature sensor is ****ed and the cooling fan isn't working as it should, but, the car is NOT overheating and didn't overheat at the track. It ran cool as normal. Again, I don't think that this would take away 50 horsepower even if it were a factor (which it's not).

This weekend I'll check it over good, starting with the plugs, then the distributor, then the fuel pressure...at this point, I'm thinking one or two cylinders are not getting either fuel or spark.

Wish me luck. Any suggestions are welcome and appeciated.