hi guys. I'm having a hard time finding my car Issue, After a lot of testing I find a MAP sensor low voltage between D17 + D21 = 4.0v map disconnected and 1.58v map connected.

The D17 + D21 should be 5.0v right?

I need help in what part of the ECU look for to repair it. What are the numbers location of the resistors and capacitors?

P06 chipped and vtec converted. Working excellent for 3 years suddenly start to bog and sputter when press the gas.

 

What numbers I need to look for the MAP sensor in the p06 board?

 

D17 = map sensor output, D19 = map sensor +5v supply

http://technet.ff-squad.com/wiring.obd1.htm

 

I seriously doubt it's your ECU. Do these in order:
Test each wire from end to end for resistance, continuity, and ground fault.
Remove all other sensors and try the test again, see if the results change. If they do, diagnose other sensors & wires.
Check for corrosion, then replace or repair the pins on the ecu plugs and at the map sensor.
Check for corrosion or wire splints at the thermostat ground, remove the ground, clean it.
Check for corrosion or damage at the grounding/ power blocks in the engine harness.
Replace the map sensor.
Replace/repair the ECU.

 

thanks, VegasInvasion.

I take my ECU to check professionally and test good, plus the guy run it in his car no problem.

change: MAP, ECT ,TPS and dizzy and the same.

The guy who test the ECU said there's be a problem in my harness, So I bought a new uncut one. I already extended and soldered the vtec PS and SOL, IAT and two wire IACV.

Saturday I'm going to install it and see what happen!!!