What causes fuel cut?
 

Any info? :confused:


Cheers.

Overboost. The ECU detects too much boost, knows that if it allows the engine to continue running like this it will go lean and destroy itself, so cuts the fuel.

Whats the best way to sort it out clean or replace boost solenoid?

Only done it once at the weekend but i did replace O2 Sensor not sure that would have anything to do with it tho

Clean it out. Connect your test connectors under the steering column to get it activated and clicking, undo the bolts and gubbins so you can pull the solenoid away from the engine bay a little, stick a rag around it and start blasting with carb cleaner in every hole. Then clean out the associated plumbing as well and check your oil level's not too high. I never run mine more than the half mark.

If you don't already have a boost gauge, you will find this very useful for this kind of problem. Plus it looks cool.

Cheers for that, a boost gauge was the next thing on my list :thumb:

Also caused by cornering too fast with not enough fuel in the tank...

thats fuel starvation, very different thing

D'oh. Thought I saw it called fuel cut on a thread about it moons ago. :wonder:

no, the effects are the same thing, but trying to cure fuel starvation involves having more than a 1/4 tank of fuel on fast corners, fuel cut suggests over boosting which causes engines to go pop.

Same symptoms, very different causes and solutions.

Fuel cut is exactly like hitting the rev limiter - a 'brick wall' effect.

Yep that's what happened - hasn't done it since tho :wonder:

if you have a MBC or similar then you may well have to adjust it between hot and cold spells as the density of air changes, what is fine in the sumnmer may well cause FC in the winter.
if you dont need to then you havent pushed the car far enough ;)