In the thread referenced above, I pulled my PEM out and dumped about a palmful of Aluminum corrosion out of it. I cleaned with contact cleaner and reinstalled. Ive driven it for about another 1000 miles with a brand new PEM in the box in the back. It might not be a bad PSA to clean the PEM on older ...

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The clutch switch will be connected directly to the ECU as it performs functions of cruise control drop as well as starter safety inhibit switch (clutch needs to be on floor to start vehicle with key) The wiring diagrams are public if you google - we don't host them here by legal agreement with Volv...

Undoing someone else’s hacked wiring is really advanced stuff.

Ypu need a bit of a deep reach on a Volvo to get to the threads but nothing too crazy

Battery fully charged. Foot down on throttle fully. Troy be consistent in measuring, comparing cylinders is useful

Usually the MAF code comes from an air leak into the system somewhere rather than a failure of the MAF. EU does have different engines and engine management systems we aren't so familiar with , though. The wrong MAF can definitely screw up your gas mileage Can I link this post to the " help,a n...

THE C70 platform is still P80 in 2004, it is the late bloomer.

It could be the wrong MAF was not recognized by the ECU and it just rAn from the lookup table. I ran 200 miles like this once and got the same gas mileage as with the MAF hooked up

Nice meeting you shockwave. Sorry I was overdressed but it was Sunday What we need is for someone to find the full IEEE description of the ECM to PEM control signal, is it a TTL square signal or what ? I thought it was a 0-5 V Square, when I’m back in ny I might be able If your Volvo place has the E...

Hmmm...from Swedespeed When you replace the fuel pump, you have to be VERY careful to avoid kinking the plastic hose. If it is kinked, you will see some of the same symptoms. I had to replace a fuel pump, and had those symptoms. Dealer foreman said maybe kinked hose. I had done the work, so had to p...