F-150 FX4

I just installed a new spectra air filter(filter only) on my existing spectra CAI tube. this is the set up i got going on, sort exhaust meets up after cats on passenger side no y-pipe or converter (not my doing, like that when i got it) into glass packs and stops. onld filter was just a normal cone no opening on the end.
Now just new filter with opening at end, no other changes. and it runs like crap just bad like its getting to much air or somthing it just feels like its going to stall all the time. idles like befor and you can rev up in park or neutral and it is just fine but in gear driving its just BAD.

greenheadkiller98

Try disconnecting your battery and wait a few mins then connect it again then start it. Ive heard the computer has to compensate for increased airflow changes. I was told to do this when i installed the Gott's mod on my 4.6

F-150 FX4

ill give it a try and let you know if it works.

Myers

I sorta had the same problem on my truck. It was the little sensor (I think its a sensor) the plug on the top of the throttle body.. that plug was just unplugged. Maybe this happen to you also?

Heres to wishful thinking! ALways love an easy fix!

BadassF1504X4

A good rule of thumb to always remember.

If you do a mod of any kind that 'MIGHT" improve performance even if its something slight ALWAYS disconnect the battery for a couple minutes or while you do the mod then reconnect. This will insure the computer is reset and can relearn any changes made.

TomR

Put the old air filter back on and see if the problem goes away, then you will know if the new air filter is the problem.

F-150 FX4

yeah thanks guys the battery thing work, but it was still missing, not as bad, but still missing so it took it to a family friend mechanic and he said it was some bad coil packs. so hopefully he can find some used ones and get it fixed for kinda cheep on tuesday. some money for the parts and a 12 pack for the lador ! good friend ot have.

greenheadkiller98

Good, glad its working out for you!

F-150 FX4

so now i got a diff ? will the y-pipe w/ converter off of a 97 fit on an 03'. for some reson the kid befor me took it off to put glass packs on.

97twd

Yes it will as long as the engines are the same a 5.4 y pipe will not work on 4.6 etc. What i had done was put magna flow cats on just one and had a fella make the pipe to fit it. You can buy the o2 sensor threads to weld on to your pipe. Good luck