912is rpm drop

Marty and Fredrik

Before you both make the 7 hour drive, I thought of one more thing that’s easy to check. Connect your BUDS computer and start the engine. Go to the Fuel and Ignition tab in BUDS and compare the values between Lane A and B for both fuel and ignition parameters. I’m not sure they should be exactly the same, but look for an obvious anomaly. Usually a MAP or MAT sensor fault will report an error, but just thinking out loud, maybe a sensor could be misreporting without causing a fault.  It would also be interesting to do a lane check watching this screen.  And if you don’t have the securing clips on your MAP and MAT sensors you should check those connectors.  

Thanks Jeff, we will give this a try before starting to take it apart.
We will record the screen while we test so we can upload it here after!

Good luck Fredrick.  I’m always interested in learning what can cause this type of obvious engine problem but will not generate a fault code.  There are probably a few folks around who know the most common reasons this can happen, but that information seems hard to come by. I would like to see an advanced troubleshooting class for these injected engines, where ALL codes are explained, and non-code failures are discussed.