(04-16-2024, 10:31 AM)Shears#22 Wrote: I got a samurai with a 93 side kick 1.6 16 valve. Ran fine until about 3 months ago. Started dyeing when I come to complete stop or just knocking it out of gear to cost to a stop. And it’s gotten worse burning rich , idling rough almost like a miss, reving up and down at times blowing black smoke out of exhaust. I’ve literally done everything I know to do. It’s OBD 1. My codes are 33. & 34. Which are both MAF. I’ve put 3 on it ranging from 150$-400$ no change! I’ve checked wiring going to sensor. Got good power and ground a solid 12.8v. Communication wire ohms out back to ECM! Sensor ohms out good! I’ve checked it plugged up and unplugged. Within the 3 months I have rebuilt the engine had block and heads checked at machine shop. Here is a list of parts I have installed trying to fix the issue!

-new temp sensor ( going to ECM )
-new idle control valve & cold idle control valve both checked before installing 
-new EGR valve
-4 new MAF
- new tps sensor
- all new vacuum lines 
- throttle body has been removed and cleaned 
- upper and lower intake have been removed and cleaned including the 4 holes in lower intake 
-new plugs ( gapped on 28)
-new wires
- new distributor and cap!
- checked timing multiple times (timed on 4) 
- all coolant hoses have been removed and blown through 
- new water pump 
- new oil pump. 
- new timing belt
- key way checked on crank
- new reman original injectors ( new seals)
- new air filter ( has cold air Intake, is secured and not bouncing around)
- new fuel pump ( bought from trail gear high pressure pump)
- new fuel filters
- new regulator on fuel rail
- fuel pressure checked on rail ( checked good)
- new pcv valve.
- new o2 sensor

Has header , pipe , and muffler no CAT. Everything flows as should.


 
Relays checked on fire wall ( Checked good even under a load )
The only thing I have not replaced is the ECM everything thing on this engine is new. Any help would be great! Im out of ideas