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View Full Version : Vw Polo 1.9TDI Hot start fix



PierreTheron
14th September, 2014, 10:14 PM
Hi
can someone modify Maps for this ecu to fix Hot starting problem ..

If unplug coolant temp sensor the vehicle starts when hot - Replaced ECT ,crank and cam sensor already .

I attach full flash file.

Thanks and regards

Pierre

kire106ka
14th September, 2014, 10:28 PM
Here it is

Fec001
14th September, 2014, 10:30 PM
Here is your file, hot start ok. But your problem is starter motor. Renew starter and get a new battery.

PierreTheron
14th September, 2014, 10:36 PM
Thanks m8 's

Battery was replaced and starter motor overhauled I think we have more off a problem on mechanical side .
Head was replaced on this vehicle and this problem only started after Head replacement .. Car goes very good and no fault codes on it ...

Will test and report back ..

PierreTheron
15th September, 2014, 05:03 PM
Hi

Ok hot start fix did not cure the problem .

Once coolant temp reaches 97 degrees c the car still struggles to start .(This is also about when the radiator fan kicks in )
Installing a 50 ohm resistor inline with coolant temp sensor cured the problem completely and fan now comes in at 86 degrees C .

Thanks for all help m8