96 4.0L with problems.

[frankv]

I have a 1996 expolrer 4.0 dohv and its running real bad. clynders 4&6 are not firing and I changed most everything from coil pack, wires, plugs, plenum gaskets and still nothing but a p0174 code. any and all help. I have been following this group and know the answer is here. thanks, going nowhere in NY,

 

[ragajungle]

Do you mean SOHC (Single overhead Cam)? Either way you should run a compression test, you may have bad compression caused by stuck valves, bad seals or rings.... You can get a compression tester from Harbor Freight for under $20 --- not sure what the compresison should be but you could test the good cylinders and then the misfiring ones and compare the pressures.

 

[frankv]

its a OHC sorry very frustrated here.

 

[ragajungle]

http://www.harborfreight.com/flex-drive-compression-tester-92697.html

This is the one I just got...

 

[frankv]

thanks, that was my next step. was running a little off so changed plugs and wires and all hell broke loose, everything is wired correct and plugs correct, just can't figure this one out.

 

[ragajungle]

Use Autolite or FORD OEM plugs, others including Bosch Platinum dont behave well in the engine. I used Bosch PP in my Taurus and it ran terrible.

 

[BrooklynBay]

Welcome to this forum! I've moved your thread into the stock 95-01 section.

 

[Wray-Wray]

are you positive plug wires 4 and 6 aren't swapped i've made that mistake once or twice even when i thought i did it right....sorry i have to ask because you said "i changed the plugs and wires and all hell broke loose"

 

[frankv]

That was exactly it. Downloaded the firing order from some site but it was wrong so I found it on this site and ran out with my flashlight switched the wires and bingo smooth as a babys back side. just have a vibration from the front @ highway speeds. almost feels like something draging or rubbing.
any ideas.