Hi again, whilst my last post was about Catch Can V EGR Bypass and thinking it was all the problems I was experiencing, I may have been quick in saying that.


After I wrote that I drove down to get some fuel, just as I was turning in to the Servo, the car started to do what I can only describe as "A learner trying to drive a manual for the first time", the old clutch jolt.


I got into the filling pump, put the car into neutral and the engine was smooth and it revved to 2500rpm without a miss. Thinking it was maybe a simple one off screw up, I fueled up and then started fine, checked again, rpm was great, smooth and without fault. Into Drive and idled to the exit ramp and waited for the traffic to clear.


Once I got a clear break I entered the roadway and drove off smoothly, but as I approached 40 km/h (25mph) it started this jolting again. Traffic was coming fast so I tried to get to the turn off quickly and for a second it responded and a huge cloud of smoke was blown out of the exhaust.


Then it was back to whiplash city. I turned onto the side street and pulled over, back into neutral, I tried revving the engine, this time to 3000 rpm and again the same results...Smooth and without fault. No smoke clouds or any other tell tale signs from the back. The exhaust smell was normal for a BMW diesel, clean and not that dirty old tractor smell.


Back in and into Drive once more, same thing effortless to 40 km/h then really hard whiplash. If I didn't know better I would say the engine was cutting out and back on again in a tenth of a second. Then the 4WD light came on in yellow.


I have replaced the transfer case gear once since I have had the car, and since I have put the staggered wheels on 9" front and 10" rear, I had noticed some odd occasions when it would click or clunk on corners. Usually I just made sure the tire pressures were all set and it would settle.
I am running the right size tyre's and I have even done rolling measurements to see that they are correct.


Maybe I should check the transmission fluid level first, where is that located. It is the ZF 6 speed.

Could this be a transmission issue?
Should I put the other 9" wheels on to see what happens then?


I am in the process of getting the ISTA+ 4.32.15 with bases 4.39.25 but to be honest, as I unpack the zip files not a lot makes sense to me. I have all the necessary connections and a dedicated laptop with heavy duty battery. So I hope to figure this out and use it as my diagnostics computer..


Up until the vacuum hose broke a week ago, the car has been running fine, now I have fixed it, it seems like it is playing find the fault with me.


Jeff

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I own a BMW E53...Always questions, unfortunately I can rarely supply solutions. I will try to give results to my problems if they are fixed and how it was done.