Need help, my engine is running like crap

[Ryanknopp]

hey,
I have an 87 ranger that isn't running well (insanely rich). I have set the timing, checked compression is good. I have run through the codes and I have a MAP out of test range, though it has a new MAP sensor. But what I am most curious to know is how go about the code 41 the HEGO sensor?

 

[PetroleumJunkie412]

Fix the map first. That basically determines everything. Find a Motorcraft one, even used. 1987 map requires baro sensor.

 

[Ryanknopp]

Ok will do. But aside from that is there any other sensor that could cause an an engine to run rich, have next to no power, struggle to recover from a quick rpm drop?

 

[PetroleumJunkie412]

Yes, but thats all the signs of a bad map.

 

[Ryanknopp]

Ok thanks

 

[Ryanknopp]

I have tested continuity between each wire from map to the harness at the ECU. However when testing voltage at the MAP unplugged harness I get two 5V measurements and a 0V. I am not sure if this is normal?

 

[PetroleumJunkie412]

ford MAP sensors of that vintage are frequency based, not voltage. Would need a frequency meter to test.

 

[Ryanknopp]

On this ranger map sensor do you know what each pin is for

 

[PetroleumJunkie412]

On this ranger map sensor do you know what each pin is for

Thats a @RonD question.



This is an actual photo of RonD:

When your ranger does not run, you pray to RonD.