RE: no start 90 200 qw

[Dave Michael <dave.michael@quantum.com>]

Hi Scott,

I appreciate the time you took to reply to my posting. Some very good 
suggestions:

>If you saw a very high duty cycle at the freq valve, this is indicative of
>a vacuum leak in the system. You should never have to adjust the mixture
>that much from the original adjustment with a  correctly sealed
>intake/breather system.

>This assumes the adjustment was not fooled with by someone else and the
>fuel distributor plunger movement is smooth and it is not sticking.

>Have you checked the following:
>replaced the fuel injector inserts and o-rings?
Done by previous owner. How well, I don't know. Does one need to pull in 
i-manifold off to remove the injectors?
>checked the back side of the main breather hose?
Hose is new
>check underneath the  rubber Tee fitting at the valve cover?
Hose is new, but wasn't when I made the co adjustments. It was veddy rotten
when I took it off, but didn't have any visible holes.
>checked the breather hose from intake boot to valve cover tee fitting?
looks ok, but I did not remove it. will check again
>Replaced the valve cover gasket?
no. but its not leaking.
>Accordion hose at intercooler?
New
>Intake pipe rubber connection at Turbo?
Not removed, but clamps tightened
>Turbo exit hose?
ditto
>Idle Stabilizer valve hoses blown off slightly?
all ok
>Dipstick and oil cap gasket?
oil cap is tight, dipstick less so
>Sticking Decel valve behind r/fender (pretty rare)
>Cam or Rear main seals? (less likely)

>One other thing, did you pull the cold start valve and watch it spray into
>a bottle during the output test? If you had the gauges connected, you could
>also watch for a pressure drop when the cold start valve is briefly
>actuated with jumper leads.
Did that last week at 30F, and got the required 3-4 second spary while cranking


My 89 200TQ would not start the other day in 20F weather,  I had to jumper
the cold start valve to get it to fire up. I was using a spare ECU that had
a dead transistor for the cold start valve circuit. The ECU output test
confirmed it was not getting grounded by the ECU. I am embarrassed to say I
have been driving it around this way for several months!  It always started
when the temps were above 40F.
Ecu output test makes the injector click, plus led test lamp flashes

Sounds like I need to check for vacuum leaks one more time, and also maybe 
check the condition of the foam in the turnbo-outlet connector pipe. I will 
also verify that I am getting spark...

thanks again

dave