I have an astra mk5 estate 1.7 fetid  - Z17DTH
I had the same/similar problem.
Random intermittent limp home mode not rev over 3000.would last between 10 sec and maybe 2 mins. Then back to normal.
would happen whether I had been driving 2 mins or 2 hours.
High mileage car. turned out to be a build up on turbo vains making some stick.
Used a bottle of forte diesel treatment and repeat in 6 months if still a problem. Could take a few months to work its magic.
repeat every 12 months to keep motor clean.
Cost me £86 to fine out a £10-ish bottle will fix it (ebay).
Had my car 2 years with problem till I found the answer.
Or replace the turbo for instant fix ? Or fome cleaned (specialist job).
Hope this helps
leave your peddles alone there all fine ?
Posted on Monday 2nd of January 2012Don't understand this? Ask a question