Last summer my 98 GT was having some miss firing problems. Took it to a ford dealer and they said fuel pump. So I replaced that...problem continued. Took it back to them, then they found more problems. Next I replaced the wires and plugs. Seemed to fix the problem for a little while, and now the miss firing is coming back slowly? I think my car might be fouling plugs really quick. any ideas?

thank you! can't install my offroad x pipe till I get my car fixed. haha

 

Mine was doing this a while back. I replaced the rubber boots on the COPs... eleminated the problem completely.

 

haha excuse my ignorance, what are the COPs? I'm a little new to this. high schooler just trying to have a sweet ride!

 

Coil-over-plug. 1999+ Mustangs use them in place of a distributor cap, instead, each spark plug has it's very own distributor cap.

I don't know if your car uses them(98). An easy way to tell...Pop your hood, do you have a distributor cap with 8 wires leading to the plugs? Then you don't.

Never take your car to the dealership man. Ever.

 

I have 2 coil packs. So four wires are leading to each coil pack. I just got a diagnostic test done on it, to figure out what's wrong then fix it myself. They wanted $1000 for the fuel pump. I bought one for $200 and installed it myself. haha thanks

 

LOL $1000 for a fuel pump.

$200 + 1 hr. install.

 

I just installed my GT supercar fuel pump today... cost me $90 and 2 hours time. Had to do some modifying to it though. $1,000 for a fuel pump is insane! For that much money it better flow 1,000 lph and give me head while I drive...