Re: [DML] Re: Disabling Lambda
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Re: [DML] Re: Disabling Lambda

Check that it is getting a good signal from the Coolant sensor in the Valley of Death..   Also check that your WOT switch is not stuck.

Both will cause the Lambda to misbehave.

If the controller is bad, maybe your frequency valve is pulling too much current??  I have not seen a schematic of the control unit, so I don't know what drives the frequency valve.  I assume it is some sort of transistor that could possibly be over-driven if there is too much current being pulled through it.

--- On Tue, 6/8/10, Richard <racuti1@xxxxxxxxxxxx> wrote:

> From: Richard <racuti1@xxxxxxxxxxxx>
> Subject: [DML] Re: Disabling Lambda
> To: dmcnews@xxxxxxxxxxxxxxx
> Date: Tuesday, June 8, 2010, 12:01 PM
> I can't really imagine what
> electrical condition could exist that would repeatedly fry
> ECU's. I performed continuity checks on all the wiring after
> the initial failure and nothing was grounded that shouldn't
> have been and no wires had continuity between them that
> shouldn't have.
> I've not completed my diagnosis, so I'm not certain of a
> second ECU failure yet, I'm just exploring possibilities in
> case it is. 
> I know that early PRV6's didn't have a lambda port on the
> fuel distributor but as you say, the way our engine is set
> up to run, it probably needs the Lambda system to run well.
> I'll check that ground wire you mentioned. If the ECU has
> failed, I guess I'll be buying another one.



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