Engine fault diagnosis for my Astra please

[hogmaw]

OK the garage don't know what's up, maybe someone here does.

 

Problem is as follows: when the car is thoroughly warmed up, like 30 mins on the motorway, the engine cuts out when it gets to over 3250rpm. I press the accelerator, nothing happens. When the revs dip below 3000rpm, I press the accellerator, and the engine gets going again. But as soon as 3250rpm is reached, it cuts out. This is the same regardless of what gear I am in.

 

It can be quite hairy on the motorway when I need to speed up to overtake cos the 3250rpm limit means the engine can cut out at 70mph in the outside lane!

 

Any ideas folks?

[Chris Wilson]

Have they had a scan tool on it? Best guess is the crank position or cam position sensor is playing up. It should definitely flag a code for such a major failure unless it;s ancient. If you'd bought Japanese you wouldn't be having this hassle

[absz]

Is it a petrol 1.8/1.6 normally the engines which have the ecu bolted on top suffer this fault and is a internal problem with the ecu and normally there is no fault code. it can also be the throttle pedal sensor (fly-by wire) if the mileage is high but that will flag a fault code.

[SUPRALOOPY]

what absz said ;0)

[Graham S]

When you say the engine cuts out at 3250rpm does it physically cut out or is it just the throttle has no response with the engine still running?

[hogmaw]

Yes a 1.6 petrol/LPG but it happens whether running on either fuel.

 

Engine still runs, but no response from the throttle unless the revs go less than 3000.

 

Thanks for all input so far guys.