Our for a drive yesterday and noticed a slight hiccup/hesitation under WOT at 4K and again at 5k rpm. Got home and noticed a loose plug wire. Snapped it back in and figured good to go. Out for a drive today and now it’s much worse. Once it gets up to 4,500rpm it acts like it is bouncing off a rev limiter and will not continue to rev. Does it under both partial throttle and WOT. Under no load it will do the same at 5k rpm. I have a new fuel filter and plug wires waiting to go in. Plugs and air filter done 1,000 miles ago and I checked for vacuum leaks with propane and found none. Anyone have any ideas what to troubleshoot? Car drives fine with normal power up until 4.5k.
Announcement
Collapse
No announcement yet.
Feels like Rev Limiter at 4,500 RPM
Collapse
X
-
Failing AFM.Owner - Bavarian Restoration
BMW and European Electronics Repair and Restoration
www.BavRest.com
My Feedback Thread
Our Facebook!
Follow our Instagram!
Comment
-
Typically when the CPS fails, the car will never start.Owner - Bavarian Restoration
BMW and European Electronics Repair and Restoration
www.BavRest.com
My Feedback Thread
Our Facebook!
Follow our Instagram!
Comment
-
Based on this thread you should replace everything :)
If it were me i would be getting the bently manual out and systematically testing all of the above mentioned sensors, as well as the coolant sensor and any other sensors not mentioned. There are testing regimes for all of them. And if they all check out then start looking at fuel supply.
Comment
-
Originally posted by IceyVert View PostFinished bench testing the AFM and I don’t think it’s causing the issue. Definitely will test what I can. Fuel filter and coil will be changed Friday, fingers crossed.
Question, if stomp test works does that mean TPS is good?
Yes, the TPS can still be misadjusted even though the stomp test initiates. Perform the testing procedure for the TPS in the Bentley repair manual.Owner - Bavarian Restoration
BMW and European Electronics Repair and Restoration
www.BavRest.com
My Feedback Thread
Our Facebook!
Follow our Instagram!
Comment
Comment