hesitation whenin gear

[big brown ford]

ill cut to the point it wouldnt start and had no code i put a new maf a new crank sensor and plugs and wires still no start then i put a pcm from another 93 explorer in it now it sarts.
starts fine but when in gear it hesitates bad to the point i wont leave the driveway i also have a popping noise coming frome the exhaust any ideas on how to fix would be very appreciative am currently taken the exhaust off to see if the cats a plugged

 

[MrShorty]

Maybe some kind of misfire? I might try a cylinder balance test.

 

[big brown ford]

what do you mean a cylinder balance test. never heard of something phrased that way thank you for the reply

 

[MrShorty]

Cylinder balance test is a test that tries to show if all of the cylinders are contributing equally. The basic idea is to idle the engine and disable each cylinder one at a time and see how disabling that cylinder effects the idle. A "good" cylinder will have a noticeable impact on the idle. Disabling a bad cylinder won't have any effect on the idle.

If you have sequential fuel injection, the PCM can run a cylinder balance test automatically. I mention how to enter the cylinder balance test in my "notes on pulling EEC-IV codes" thread in the EEC-IV forum. When I've done it manually, I've pulled the spark plug wires one at a time.

 

[big brown ford]

thanks thats understandable sad to say ive done this on other vehicles ill try it in a little bit

 

[big brown ford]

thanks for the info i i found a brand new wire with a problem