brand x misfire

[poppa]

Wifes 99 Mustang. Barely driven in 2 years. Had a misfire early on ,4.6 GT. Code shows #7 misfire. I swapped the coil with #5 ,still shows code for #7 p0307. Can/should I try swapping  the injector? Thanks

[TommyGun]

Yes you can swap an injector.  Just be carefull not to mess up the o rings.  I would swap a spark plug first since it would be easier.  Always start with the easy stuff.

[Charger_Fan]

Yes you can swap an injector.  Just be carefull not to mess up the o rings.  I would swap a spark plug first since it would be easier.  Always start with the easy stuff.

I agree, it may have just fouled a plug.

[poppa]

new plugs. I set to factory specs (this was at least a year ago , not even 500 miles)but later on one of the Mustang forums I remember seeing that the gap should be smaller. Guess what I can't find....yeah that forum. Can't remember which one it was.

[69wannabe]

Did you use motocraft plugs? Aftermarket plugs these days are not that good(autolite,bosh) are junk in my opinion. NGK's seem to be good spark plugs recommended by firefighter Ron and I am currently running these in my charger and all of my jeeps. Also a noid light set is handy to check and see if the power going to you injector is working properly and the set I have was very inexpensive. Just plug it into the injector plug and start the engine and if it blinks/pulses it is working and it it does not blink of just burns steady the ecm has lost it's ground or that injector driver in the ecm has failed. The V6 mustangs (3. in the mid to late 90's were bad about doing this on #6 cylinder and the windstar vans too. Fixed several by swapping in a new ecm. By the way ford is just ford, chevy is brand X!!