Probs When Starting Car When Warm

[B9RY C]

I've got an STI V4 and yesterday I had probs re-starting the car after I had stopped to go to the shop (I had been driving for 20 mins). After about 5-6 attempts the car started. Its not the fuel pump as it has been changed recently and I can hear it start when I turn on the ignition.

The car always starts first time every time when it is cold but thats twice (in 4 months) that it has failed to start when I've stopped. I'm gonna be selling the car soon and want to make sure theres no probs before I do so. Anybody got any ideas?

Cheers

Barry

[iain_ogston]

sounds like classic symptoms of a cam or crank sensor on the way out. These are magnetic hall effect sensors which degrade over time.

I had this problem on my 95 model, and it got progressively worse to the point car wouldn't start at all when warm (even after a 1/4 mile drive to nearest petrol pump). Car would start 1st time when cold. I admit I was lazy and just kept bumping up the cranking times on the PFC to get it to start

[B9RY C]

Cheers for replying. Is it an expensive fix?

sounds like classic symptoms of a cam or crank sensor on the way out. These are magnetic hall effect sensors which degrade over time.

I had this problem on my 95 model, and it got progressively worse to the point car wouldn't start at all when warm (even after a 1/4 mile drive to nearest petrol pump). Car would start 1st time when cold. I admit I was lazy and just kept bumping up the cranking times on the PFC to get it to start

[iain_ogston]

new sensor from subaru is in region of a hundred quid or thereabouts I think.

Sure some scrapper/breaker can get you one cheaper if it turns out to be the problem.

[the squiggle]

Another likely culprit is the temp sensor

When this goes wrong the ECU thinks the engine is stone cold and adds in extra fuel to get the thing going