2.0l 16v problems when hot

[vw rule 19]

Did a check on the coolant temp sensor ( 2 pin connector to left of dizzy. 2300 ohms at room temp. 400 ohms sitting in freshly boiled water. So its working but a bit out of range maybe?

 

Yes it's out of specified range according to the Bentley manual, the 16v engine's heat up to a running temperature of 87°C to 90°C max, and the sensor should read between 200 and 300 ohms, if you've boiled water which is basically 100°C it should have reached a lower reading then 250ish ohms, as it's only got to 400ohms in hot boiling water, it looks like the sensor is on the weak side, which can effect signals sent to air flow sensor and fuel governor pressure regulator, as they need the correct readings from ECU.

 

You've mentioned your son's Corrado run's smooth from cold, but plays up once up to running temperature.

 

Si

[vw rule 19]

The Bentley manual says you can check the voltage input and output readings, from the air flow sensor with multimeter, but states the engine has to be at running temperature, and ideally has correct readings from throttle position switch, coolant temperature switch, and fuel governor pressure regulator via ECU, otherwise you could be seeing false readings.

 

Si

[Dandan62 10]

Not had much time between rain to get at the car. New temp sensor read the same ohms as the old one. Must be my meter! Sadly didn't solve the problem. At least it is ruled out cheaply.

[vw rule 19]

Hello mate,

 

I've seen you've posted up on your other thread about not needing another (9A) fuel metering head, have you had any joy in tracing the hot running issue.

 

http://the-corrado.net/showthread.php?110333-Wanted-metering-head-2-0l-16v-9a

 

Si

[Dandan62 10]

Sadly this car has been sold to an enthusiast who knows about the problem. We are glad its going to a good home and not being sold for parts. Hopefully a Corrado on the road for many more years.

Thanks for everyone's help and time taken to try and help.