I have a 97 5.4 Expedition with a slight miss under load. I was wondering if anyone has the ohm values for the COPS so I can check them to find the bad one. It is alot cheaper than replacing coils until I find the right one. At $80 each it would get kinda costly! Thanks in advance!

 

Have you scanned for codes to see what cylinder the mis-fire is on?

 

Thats the whole problem...... there are no codes being thrown! I got a CEL last week and I believe it was a 1299 code. I am pretty sure that is the MAF. I run a K&N and I had just cleaned and reoiled it and I think that threw the code. This is a miss under load and it goes away with throttle. After about 1200 RPM's it runs like a scalded dog! I changed all the plugs and serviced the transmission including TC. This thing has never so much as even hiccuped let alone miss! I am a little frustrated and I am about out of options. Any help would be great! Thanks in advance again!

 

K&N? The other possibility is you have contaminated your MAF sensor with oil, and this is causing all your problems. I would go back to the OEM paper filter, and change it regularly!!

 

Just try cleaning the MAF with carb cleaner. Spray down the wire elements. Do not touch them though, they break easily.

 

I have already cleaned it. I got another code this morning on the way to work. It is a P0320 Ignition engine speed (PIP) input fault. I am now completely lost! The truck won't drive. It will idle fine and take fuel fine. It goes in reverse fine. It will not pull in drive.