Someone please HELP!!! - Ford Forums

XltBronco · 03-07-2002, 11:41

Hello to all in the forum.

I need your guys help. I have a 1991 Bronco 5.8 w/ e40d trans, my transmission wiring harness got wrapped around the drive shaft and got trashed. Since then I rewired the harness perfectly all wires matched up. But when I start the motor it runs too rich and the plugs get covered with carbon and injectors, pump too much fuel into the motor at idle. When I rev it up it sounds fine but doesn't idle right. I brought it to three shops and no-one can fix it.

I changed:
Throddle positioning senor.
B/Map senor.
Coolant senor.
Air Charge Senor.

Someone please help.

Thank you.

HSE2 · 03-13-2002, 03:32

Hello I will see if I can't get someone to have a look at this thread.

Welcome to the site!

03-21-2002, 06:12

G'day XLTbronco dude,

Have you performed a self test? Or, do you know what a self test is?
When you say it runs fine above idle what do you mean?
Can you please give a lot more detail in your description of the symptoms?

Was the trans wiring the only wiring damaged? When you say all wires matched up did you "buzz" them out with a multimeter?

Pete.

XltBronco · 03-27-2002, 12:08

I ran the self test and got these codes.

Code 25 : Knock not sensed during dynamic test.

Code 22 : BP senor out of self test range.

Code 111 : System Pass.

Now the fuel pump is raddling like crazy and it stay on the whole time except when I turn off the igniton. The car is undriveable. The plugs are covered with carbon. It sounds like all the cylinders are fire at 3,000 rpms but any thing below that it can't burn all the fuel that is going into the motor so it stalls, I have to keep my foot on the gas to keep it running.

I hope that helps, thanks for replying.

XltBronco · 03-27-2002, 12:10

And what is a BP senor?

Partsource · 04-15-2002, 23:43

bp sensor thats easy barometric pressure sensor if its messed up you cant find it and it causes a cruddy time because no one knows what the realy use of a barometric pressure sensor has on most automotive applications

yeah change the thing cant do much else with it except brag to your friends that you know what a barometric pressure sensor is and they dont

04-18-2002, 05:55

In your case XLT,

The BP or BAP sensor is actually a MAP sensor. The sensor itself is one and the same. MAP means Manifold Absolute Pressure so, The nipple on the base of the MAP sensor is connected to the intake manifold. BAP sensors are used on MAF vehicles to measure atmospheric pressure, hence the nipple is just left open.

If the MAP is out of range you may want to replace it or check the wiring to it. Before you buy a new MAP sensor see if you can try your MAP sensor on one of your friends cars. That way you can be sure it's the MAP and not the wiring that's the problem. Then you can try theirs on yours to see if it fixes it.

It's interesting that you have a knock code because as far as Ive been able to discover 5.8's did not have knock control....Only 5.0's. Still they did do some funny things in California.

BTW you didn't say if these were engine off or engine running codes?

Pete.

Gearhead99 · 04-20-2002, 06:56

I agree with changing or at least trying a MAP sensor. Also, the fuel pump has to run all the time that the engine is running or the engine won't run.

Also, check the fuel pump pressure at the fuel rail. High pressure will cause you problem too. It is controlled by the pressure regulator. Which needs vacumn to operate too.

XltBronco · 05-07-2002, 10:54

They were running codes. I did change the fuel pressure regulator on the fuel rail and nothing. There is fuel in the oil too witch I have changed twice. I just can't figure it out. I've also replaced the computer with a remanufactured one.

HELP!

:(

05-08-2002, 06:04

That's really sounding like a dead or disconnected MAP sensor to get that much fuel in the oil. What is the condition of the hose that connects the MAP sensor to the intake manifold?

Pete.