Re: MC overboost problem

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <000301be9557$7c0d6aa0$4d160d0a@joukoh> "Jouko Haapanen" writes:

> I have a friend's MC engined 200 in the shop with an overboost problem.
> Boost spikes up to 0.75 to 1.0 (0.7 bar spec) and fuel is cut off.  No fault
> codes, and only occurs at kick-down (auto trans, fwd).  Any ideas??

It's almost certainly NOT the ECU.

Run the output diagnostics and check the wastegate frequency valve
is clicking.  If it is, check it with a MityVac.  Then check the 3.5mm
hoses from the turbo inlet, rear of inlet manifold, and to the wastegate.

If the wastegate frequency valve isn't clicking, check for continuity
through it and then attach a diode light into the connector and look
for pulses.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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