Loose wire, Could this be my problem?

[Travis1461]

Hi,

I have a 91 ranger with the 2.9 in it. It has recently started stalling, backfiring, dying, and bogging down a lot especially up hills. The only code I can get is 67 on the ford code reader which is neutral safety switch failure open circuit (PNP). I went to the junk yard and replaced it and get the same thing. I did notice I have two wires stubbed out from my main harness wires coming in from the firewall by the parking brake. There is a brown connector that looks like the small code connector that plugs into the code reader. Then there is a brown wire with a green stripe with a funky looking spade connector on the end. It stubs out all by its lonesome and has a tag on it with numbers from the ford factory. I have not noticed this one before but have noticed the code looking connector unplugged just figuring its an extra ,since most the wiring harnesses were the same for most engines in that year just different connectors were used and some werent. Do other 2.9'ers have this brown with green stripe wire disconnected? Could a faulty neutral safety switch cause my truck to stall, die, bog down, and surge through driving?

 

[Big Jim M]

If you drive it really easy does it bog down? Does it ONLY bog down when it is using a certain amount of fuel or upwards from that certain amount? If so then look to the fuel delivery system.. Usually the filter is first suspect.
Big JIm

 

[Travis1461]

It seems to bog down around 2500-3100 rpms and then it will be fine unless I really press the gas then it really bogs down and I almost have to red line it in a lower gear to get it to go anywhere. Fuel filter is new, fuel pump and assembly is new and the tps sensor works just fine. Coil is brand new, wires, cap, rotor are all fairly new with no carbon traces. Tfi module has only about a year of use on it.

 

[holyford86]

It seems to bog down around 2500-3100 rpms and then it will be fine unless I really press the gas then it really bogs down and I almost have to red line it in a lower gear to get it to go anywhere. Fuel filter is new, fuel pump and assembly is new and the tps sensor works just fine. Coil is brand new, wires, cap, rotor are all fairly new with no carbon traces. Tfi module has only about a year of use on it.

Have you pulled the KOER codes yet?

 

[Travis1461]

It wont let me pull the running codes until the engine off test passes with the ford code reader I have. It keeps popping up the neutral safety switch circuit is open or faulty. I have even changed it and it says the same thing.

 

[holyford86]

are you pulling codes with the trans in gear? that would cause that to happen