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Old 21-05-2018   #1
Join Date: Nov 2011
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Fiat 2.0 Turbo Boost Fault

Hi guys, I have an issue with my Fiat 2.0 twin cam and hopefully you can help.
I confess it isn't a coupe, its a Lancia Dedra, but it is the same engine and the issue will be a universal fault.
In 3rd and 4th gear the turbo spools smoothly and boosts fully for around 5 seconds then suddenly the turbo will quite violently stall, and it feels like someone has just stamped on the break! it will lag for a couple of seconds then spools up again.
I unplugged the boost pressure sensor to see if it was faulty and sensing a boost spike but the problem still occurs!
All advice will be much appreciated!
Jonny
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Old 25-05-2018   #2
Join Date: Jan 2011
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Re: Fiat 2.0 Turbo Boost Fault

Hey Jonny-

this has to be a boost-controller issue.

Not an engine I've owned, but I do have a the Guy Croft book on the subject, with lots of info on that engine.
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