My lovely Xantia V6 (yes I know but I couldn't resist it)has started playing up and not wanting to start when hot.
It runs at normal engine temperature but then switch off , leave it for 20 minutes and try to restart, it floods, refusing to start until its cooled down a bit more.
When it does eventually start it runs very rough for a few minutes (getting rid of excess petrol?)and the idle speed is a bit high at 1000rpm.
I am beginning to suspect either stepper motor or possibly engine temp sensor.
Anyone else got some better ideas?
V6 starting problems
Moderator: RichardW
A V6 is no "better" than a straight 4 - it needs fuel and ignition, correctly metered, to start and run properly [8D]
I agree that symptoms points to a defective engine temp sensor, as this together with the CPU acts as the engine "choke" device. Would defo try this first.
For a test - try shorting out the 2 pins on the sensor cabling. This resembles a (very) hot sensor, thus the CPU will cancel a choked start.
Opposite - with engine running and hot - try disconnect the sensor cable. This resembles a (very) cold engine. The CPU will then instantly choke (and then flood) the hot running engine.
I agree that symptoms points to a defective engine temp sensor, as this together with the CPU acts as the engine "choke" device. Would defo try this first.
For a test - try shorting out the 2 pins on the sensor cabling. This resembles a (very) hot sensor, thus the CPU will cancel a choked start.
Opposite - with engine running and hot - try disconnect the sensor cable. This resembles a (very) cold engine. The CPU will then instantly choke (and then flood) the hot running engine.