Still 5KTQ No Start

[Ameer Antar]

I'd check all involved systems. It could be electrical, so check all the 
cables from the batt. to starter and make sure that batt. cable crimp in 
the passenger side is not corroded. The Bentley covers how to check the 
starter, could be worn brushes. Also fuel system is very likely. The 
cold-start valve could be leaking. You can pull the valve off and turn on 
the ignition to check. The mixture might just be slightly off. You can 
adjust it w/ a 3mm allen wrench and something to monitor the mixture w/ 
like a dwell meter. It would be good to monitor duty cycle readings off the 
CIS freq. valve to see if the ECU is detecting a rich or lean mixture or 
whatever. You should monitor it from startup to hot engine condition. And 
monitor again when you have a hot-start problem.

Check for low control  pressure when the warm-up regulator and engine is 
hot. Also, the warm-up regulator should have a resistance of 17-21 ohms and 
there should be 12V at its wiring harness. Low residual pressure could 
indicate a problem w/ some leaky component, like freq. valve, etc. Vac. 
leaks cause problems, but usually cause lean running, so if you suspect too 
rich of a mixture, cuz of fuel smell, this might not be it. Even the fuel 
distributor could be suspect. CIS can be a little difficult especially on a 
Turbo engine b/c of all the components. The Bosch book by Probst is really 
good at troubleshooting and theory. good luck.

-ameer

At 10:03 AM 1/19/2001 , you wrote:
>A few weeks ago I mentioned a hot start problem, if there is such a thing 
>in Maine in January, with my 86 5KTQ.
>After checking fuel pressure, residual and otherwise, throttle position 
>switches etc., I settled on the oft mentioned injectors.  I assumed they 
>were leaking gas into the cylinders and causing the problem, (any shut 
>down of 5 minutes to 2-3hrs and the car will not start without very long 
>crank times and a WOT)but when the car sat overnight, it starts no problem.
>Well new injectors did not help, I'm at a loss, any other ideas!?
>Thanks
>Mike
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