93 Ford Ranger needing HElP!

[twopkhgh]

4.0 engine running rich ,rough idle , I have new spark plugs and wires,MAF< purge valve,and fuel pressure regulator any help would be appreciated

 

[adsm08]

What are your pressures. If something happened to the return line it can kick pressure way up and do that.

 

[93 4x4]

Also check your computer board. my diodes leaked out on my board and caused the same symptoms look for black circles on the board under the diodes were the wires connect.

 

[UrbanRedneckKid]

Replace your coolant temp sensor, they are known to go bad and cause a rich condition.

They go bad and read -40 degrees, thus the ECU dumps fuel.

It's a cheap sensor to just throw at it, if you have no way of reading the datastream.

 

[twopkhgh]

93 ranger,burning rich also shakes and vibrates when idling!