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Gtb twin turbo engine problem


Gtbdenz
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The engine running out of steam at 4500rpm does sound like boost or fuel cut but why it should make the whole car shake is beyond me.

Read the ecu codes first. That's always the first step with any running problems. It should at least point you in the right direction.

Which generation GTB is it?

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to allow these cars to read in mph instead of kph, a converter chip is fitted (usually behind the instrument cluster). It's not unheard of for them to fail which would cause the speedo to stop working. However, that would be a bit of a coincidence, for it fail at the same time as the revs stopping at 4500rpm.

As I said above, read the codes stored on the ecu first. If the car is totally new to you and it's always done this since you owned it, read the codes, make a note of them, clear the codes and go for a drive. Then read the codes again. The reason for this is that you may have stored codes from a long time ago that are no longer applicable.

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