bought a 92 b2200. solid body, ran great for 3months. had some stange things happen in the last week. crazy idle( up and down then settles at 1300rpm), rpm actually drops when i give a little gas, very hard on gas, now it won't start. any ideas?

 

Carb or fuel injected?

 

fuel injected

 

smells like it's runnung rich too

 

I would start by cleaning the mass airflow sensor i guess. Check the ECT as they tend to corrode. It is not uncommon for the injector harness to have problems and fry the ECU on those either,you can remove the ECU and remove the cover for a visual inspection of the circuit board. If it has a burnt place in it replace the injector harness. Obviously it could be a lot of things but that is where i would start. Could be as simple as a bad coil since its 17 years old. I would rule out the fuel pump since black smoke is excess fuel.

 

warmed up to -11 celcius today. going to go outside to try and fix my truck. how do you clean a mass airflow? just spray the connections?