N62 minimum valve lift

[upallnight]

Originally Posted by hpy540

First time today since i put it back together it didnt miss when warm starts. several starts after only sitting for 1-2 hours in 40*F weather. Seems to be getting better. idk. but no codes today.

[hpy540]

i know the difference betweena N62, a M62, and a M62tu. the one i amhaving problems with is a N62 with variable intake runners in a 2005 x5

[bcredliner]

Originally Posted by upallnight

The people who are giving you advice about the DISA valve either
1. don't know that you have a V8 engine, or
2. don't know what they are talking about, or
3. both of the above.

V8 engine does NOT have a DISA valve. That valve is only found on the I6 X5.

4. Made an honest mistake, getting old, easier to get confused---sorry hpy540

[hpy540]

Originally Posted by bcredliner

4. Made an honest mistake, getting old, easier to get confused---sorry hpy540

No problem, this this is very frustrating. thanx to all for any input. i would reallylile tolnow wjy i cannot get to the valve lift adaptaion in INPA on my ibm t30. Gert form the 8 board over on BF finished the setup for me. i have dis 44 and 53 with sss & inpa. this x 5 is wearin me thin.

[hpy540]

i dont know why this engine is so finickey. th e31's were said to be problematic. but they are easy compared to this POS. i am gonna try a new MAF on friday. those are expensive for this thing. and i thought E31 MAF was expensive.

[LVP]

I thought for sure I would have revived this thread already and started swapping posts about minimum valve lift settings and such. Every time my X5 got to the cold weather, it would flash CEL and run like crap when you started it. If you turned off and back on soon enough, you would avoid the permanent CEL and it would run fine. I was playing around with intermediate lever lift settings forever.

This year however, I haven't had one instance. And it's been really cold (-20C for a good spell).

Wind the clock back a few months. I had what I thought was faulty ignition switch (replaced it). Turns out it was the starter. But in my pursuit to diagnose, I stumbled across the integrated voltage module (IVM). I found a schematic that showed that module tied to the servos (among a host of other components). For the life of me I can't reproduce that site or schematic, but trust me, I saw it. Either way, I replaced mine. It looked fine, slight condensation markings, but no smoking gun. My X5 has 285,000km. Note, I did validate back at 180,000km that my batch of levers was not part of the recall batch.

This winter, zero mangled starts, no CEL, no restarting every other cold start.

The module wasn't too pricey from the dealer and easy to replace. Worth it if it truly fixes it for some of us

[hpy540]

any part number for IVM? location?the cv boots have been dpen on mine because the shafts had to be removed to fix alternator bracket o ring failure.
. that was a nightmare. but i want to see about fixing this because it will not start in this cold weather. -8 F here this morning. first errand ran with it lat night, started it, pulled out of heated garage, went to subway,
, went in , ordered food, when i came back out, the x5 would barely run.
it was sitting in the 0F cold for only 10 min. could barely it to stay running. here is the part number , 12 52 7 510 638. now to find location

Originally Posted by LVP

I thought for sure I would have revived this thread already and started swapping posts about minimum valve lift settings and such. Every time my X5 got to the cold weather, it would flash CEL and run like crap when you started it. If you turned off and back on soon enough, you would avoid the permanent CEL and it would run fine. I was playing around with intermediate lever lift settings forever.

This year however, I haven't had one instance. And it's been really cold (-20C for a good spell).

Wind the clock back a few months. I had what I thought was faulty ignition switch (replaced it). Turns out it was the starter. But in my pursuit to diagnose, I stumbled across the integrated voltage module (IVM). I found a schematic that showed that module tied to the servos (among a host of other components). For the life of me I can't reproduce that site or schematic, but trust me, I saw it. Either way, I replaced mine. It looked fine, slight condensation markings, but no smoking gun. My X5 has 285,000km. Note, I did validate back at 180,000km that my batch of levers was not part of the recall batch.

This winter, zero mangled starts, no CEL, no restarting every other cold start.

The module wasn't too pricey from the dealer and easy to replace. Worth it if it truly fixes it for some of us

[Lemboss]

Originally Posted by LVP

I thought for sure I would have revived this thread already and started swapping posts about minimum valve lift settings and such. Every time my X5 got to the cold weather, it would flash CEL and run like crap when you started it. If you turned off and back on soon enough, you would avoid the permanent CEL and it would run fine. I was playing around with intermediate lever lift settings forever.

This year however, I haven't had one instance. And it's been really cold (-20C for a good spell).

Wind the clock back a few months. I had what I thought was faulty ignition switch (replaced it). Turns out it was the starter. But in my pursuit to diagnose, I stumbled across the integrated voltage module (IVM). I found a schematic that showed that module tied to the servos (among a host of other components). For the life of me I can't reproduce that site or schematic, but trust me, I saw it. Either way, I replaced mine. It looked fine, slight condensation markings, but no smoking gun. My X5 has 285,000km. Note, I did validate back at 180,000km that my batch of levers was not part of the recall batch.

This winter, zero mangled starts, no CEL, no restarting every other cold start.

The module wasn't too pricey from the dealer and easy to replace. Worth it if it truly fixes it for some of us

Do i understand correctly that playing with valve lift did not give positive result and only after you have changed IVM the cold start problem with flashing CE light disappeared and all have been fine since then ?

[LVP]

Ran well for a few weeks, then lumpy starts and/or flashing CEL. Only once did CEL stay on. I played with the lift again and seemed ok, but then it started to warm up and I have to wait until next year. So, was it better, yes. Did it fix/eliminate, no.

[Lemboss]

After reading posts and playing with INPA i understand that there is no connection between cold start problem and valve lifting setting! When you start your car the valve lift is set to default 6mm and keeps it until rpm fall to 600 and that is the time period usually until when CE light flash. Even after that valve lift changes to other default setting which is 0.3 mm and keeps that level for some time until the engine warms up. I am not 100% sure if the timing is exactly the same, but it seems that valve lift changes to set height which you have set in INPA only then when INPA allows you to change valve lift setting.

So basically set valve lifting kicks in only after short drive when engine is warm when the CE light have flashed long time ago, so valve lifting can make difference only to a warm engine, not cold start.

So my question is that what happens to fuel consumption and power when you lift the valve ? If valve it set to 0.8 mm the fuel consumption is greater but also more responsive throttle and better acceleration ? And if set to 0.3 mm then fuel consumption is less and also less responsive throttle with not so good acceleration? Or it is the other way around ?