200 10V stumbles, poor mileage

[Konstantine Bogach]

Ok,  I checked rpm, crank position sensors with scope and they look 
fine, no aberrations.   Signal on terminal 1 of the ignition coil look 
ok to me, meaning that ECU ignition function is ok.    Ground to ECU is 
good.  Air, engine temp sensors are passed resistance check.  Oxygen 
sensor is heated, ECU receives it signal (looks like in range 0.1-0.8 
V).  What is left to blame are rotor, cap, coil, wires and plugs.  One 
thing surprised me:  why cold start valve is powered all the time?  Is 
it supposed to?


Thank you.
Konstantine.

On 12/24/2009 12:48 PM, Konstantine Bogach wrote:
> I checked ignition control function of ECU and I am not sure about the 
> result.  Repair Manual says that while cranking,  voltage between 
> terminal 2 and 3 of the ignition booster connector should be no less 
> than 0.2 V.  I don't see any steady DC value.  Most of the time it is 
> close to zero and just sometime ~1.4 V blinks on the multimeter's screen.
> Anyone remember what you saw at this test?
>
> Most likely it is not the cause of my problem cause symptoms are same 
> with spare ECU, but being not able to interpret the measurement 
> bothers me.
>
> Thank you.
> Konstantine.