Project IL

[georgebest]

Is there a separate one for the temp gauge than for what you see in inpa? Because the gauge goes to midpoint and stays there once the car is warmed up.

That's a mystery I couldn't crack yet. My gauge works independently from the engine temperature, I couldnt figure where the gauge gets the data. There was another post with the same issue, gauge was not showing correct temperature so it's not only my car.
What do you see in INPA when the engine is running? I think it's on the "Analog 1" screen in "Status" (DME module > "Status" (F5) > "Analog 1" (F2)

[chucknorium]

Its a double sensor so I believe one of the two sensors (mated into one) is faulty. The section for temp gauge works but dme does not see proper value. Just a thought

[clarkitect]

That's a mystery I couldn't crack yet. My gauge works independently from the engine temperature, I couldnt figure where the gauge gets the data. There was another post with the same issue, gauge was not showing correct temperature so it's not only my car.
What do you see in INPA when the engine is running? I think it's on the "Analog 1" screen in "Status" (DME module > "Status" (F5) > "Analog 1" (F2)

Its a double sensor so I believe one of the two sensors (mated into one) is faulty. The section for temp gauge works but dme does not see proper value. Just a thought

Bentley manual confirms that is a double sensor. Fortunately I have a spare E38 to pirate from so will swap the sensor over and see how it goes. Wish I could spend the day working on the car but it’ll be a family day. Will hit it hard tomorrow.

[georgebest]

Its a double sensor so I believe one of the two sensors (mated into one) is faulty. The section for temp gauge works but dme does not see proper value. Just a thought

Would explain what's happening on my car, just the other way around. Will replace it to check, thanks.

[clarkitect]

Swapped camshaft sensors, no change. Searched for vacuum leaks, disconnected hoses, disconnected electrical items. CCV diaphragm looked fine (did the 10 minute replacement trick). Car will get a cel for P0306, runs with a miss. Cleared error codes/ adaptations with INPA. Car will then have a really hard time starting, you have to keep giving it gas. Eventually it will begin to idle on its own. Seems like vacuum leak until the engine management can compensate. Additive adaptations reading seems to imply vacuum leak.













Not sure why that -48 reading. Gauge reads fine, coolant temp on tha analog screen reads fine. At this point I’ll just be swapping parts.

[georgebest]

Clearing adaptation in INPA: there is a procedure to follow after clearing it for reinitalization. Have you done that? I dont recall the details but like waiting 30sec with ignition in pos 2 or similar, before first starting.

Otherwise this is really strange. Since you have swapped everything at Cyl 6 and it's still giving you error my only guess would be the wiring harness perhaps? Cause that's the only thing you couldnt swap around. This problem is at Timm's level, I think I'm tapping out Hope you will figure!

[purplecty]

The cylinder smoothness values are kind of high...

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[clarkitect]

Clearing adaptation in INPA: there is a procedure to follow after clearing it for reinitalization. Have you done that? I dont recall the details but like waiting 30sec with ignition in pos 2 or similar, before first starting.

Otherwise this is really strange. Since you have swapped everything at Cyl 6 and it's still giving you error my only guess would be the wiring harness perhaps? Cause that's the only thing you couldnt swap around. This problem is at Timm's level, I think I'm tapping out Hope you will figure!

Ha! I’m about ready to tap out too. I need a reliable car and have about reached my underhood limit on this POS.

I did figure out the reinitialization after clearing the adaptations. Car would rev up and down and give engine failsafe error/error 134 on inpa. Solved this issue with good old search thanks to IcemanBHE.
https://www.bimmerforums.com/forum/s...5#post21649965

The cylinder smoothness values are kind of high...
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It’s running like poop Purp. It was running great all week then this. Happened rather suddenly.

[purplecty]

Ha! I’m about ready to tap out too. I need a reliable car and have about reached my underhood limit on this POS.

I did figure out the reinitialization after clearing the adaptations. Car would rev up and down and give engine failsafe error/error 134 on inpa. Solved this issue with good old search thanks to IcemanBHE.
https://www.bimmerforums.com/forum/s...5#post21649965



It’s running like poop Purp. It was running great all week then this. Happened rather suddenly.

What if you disconnect the MAF?

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[clarkitect]

I swapped MAFs with my black car and no change. I guess I could try disconnecting.

[clarkitect]

I couldn’t even get it to run without the MAF plugged in.

[georgebest]

I couldn’t even get it to run without the MAF plugged in.

Mine always dies in a few seconds if unplugging MAF when running. But anyway, how would MAF affect only one cylinder? Has to be something else.

[purplecty]

Mine always dies in a few seconds if unplugging MAF when running. But anyway, how would MAF affect only one cylinder? Has to be something else.

Unplug it and then try starting it. The picture of the cylinder smoothness looks to be almost all cylinders running kind of rough. Doesn't hurt to try it...

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[clarkitect]

I thought it would at least start with it unplugged but it wouldn’t.

It definitely seems to be related to cylinder 6 since pulling the other 7 coil wires results in change of idle but #6 doesn’t. Odd it would come on suddenly.

Maybe I will have a sudden revalation.

[purplecty]

I thought it would at least start with it unplugged but it wouldn’t.

It definitely seems to be related to cylinder 6 since pulling the other 7 coil wires results in change of idle but #6 doesn’t. Odd it would come on suddenly.

Maybe I will have a sudden revalation.

Could be wiring, coil, plug, injector... 3 and 5 are way out of bounds on the value...

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[clarkitect]

I’ve tried swapping coils and wiggling the wire looms. I could try new plugs. Seems odd that the only codes I get are P0306 for cylinder 6 misfire and P1423 for secondary air bank 1. I would have thought I’d get multiple misfires at high rpm with readings like I’m getting, and bad plugs I would think would get the fuel shut down.

[purplecty]

I’ve tried swapping coils and wiggling the wire looms. I could try new plugs. Seems odd that the only codes I get are P0306 for cylinder 6 misfire and P1423 for secondary air bank 1. I would have thought I’d get multiple misfires at high rpm with readings like I’m getting, and bad plugs I would think would get the fuel shut down.

Push it hard and see are what misfires... That's how I get mine to show...

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[KSEADUB]

It should run without the MAF plugged in. It will go to a base fuel mapping that does not require mass airflow.

This makes me think you have a massive vacuum leak somewhere...


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[clarkitect]

Push it hard and see are what misfires... That's how I get mine to show...

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I will try again. So far only able to get the P0306 when pushing it.

It should run without the MAF plugged in. It will go to a base fuel mapping that does not require mass airflow.

This makes me think you have a massive vacuum leak somewhere...

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I also came to this conclusion back in post 80 based on what I saw in the analog 2 page in inpa. But the question is where? I can’t see anything obvious and spraying brake clean didn’t point to anything. Pulling dipstick or oil filler cap shows a good vacuum in the crankcase.

Other than the vacuum hoses I think intake manifold gaskets and the pipe between the osv and ccv would be possible locations. I’ve been putting off pulling the intake. If I do all that and it still doesn’t run it’ll be bad. Where else should one be looking for vacuum leaks?

[RL740IL]

I'm thinking you could have a stuck, collapsing exhaust lifter from pushing all that sludge around. Would also account for vacume lost. If collapsing it would make no noise.

[clarkitect]

I'm thinking you could have a stuck, collapsing exhaust lifter from pushing all that sludge around. Would also account for vacume lost. If collapsing it would make no noise.

I am thinking you might be on to something here RL. After taking on a run this morning I no longer suspect plugs or coils, or possibly even vacuum leaks. I was suspecting compression but your comment, and what Jamos said a while back about screwing with the sludge is haunting me.

This morning I took her on a good drive, plenty of WOT runs to redline. I would get a flashing CEL at low speeds. Once it started flashing, jump on it and the flashing stopped. After driving around, still a lumpy idle. Plugged in this inpa and still the same codes.

Isn't there an english version of this software?






Do these adaptations look bad to anyone?


Hard to take pictures crammed into the car with the laptop and cell phone. Sorry blurry!


Smooth as silk. . Other than the lumpiness though she's pretty quiet and pulls pretty well.

[Timm]

That's pretty horrible readings on the roughness!

Normally an inlet manifold leak (or an air leak anywhere past the MAF) would cause the additive adaptations to increase - and yours haven't. I'm currently finishing a video covering this and introduced a small vacuum leak by removing one of the blanking caps on the PCV - and my additive adaptations reached 20 on both banks. So, a value of 1 - 2 is absolutely nothing to worry about.

Having said that, you have some rotten misfires according to you and the roughness values - and that pushes the mixture rich as the errant cylinder does not fully consume the fuel/air mixture. So, you can have a situation where you have a large air-leak but still have neutral adaptations.

Your injection time is longer than expected at 3.65ms - at idle it is usually around 2.5ms - so the ECU is having to inject more fuel than usual to keep the engine idling, but that's hardly a surprise seeing as you have misfires.

My gut feeling is that you have something mechanical awry, and the next plan would be to do a compression test - if that comes back fine then we can find the cause another way, but unfortunately I suspect that a bit of an exhaust valve has dropped off - and only a compression test will find that.

But, I'll have a look at your screen shots again and do a bit of investigation.....

P.S. It is worth saying that the quick PCV valve replacement often doesn't work, the spring cants over or the seal is pinched....

P.P.S. Error 62 is: P0300 62 Random/Multiple Cylinder Misfire Detected - so all the cylinders are misfiring

[clarkitect]

Thanks for your insight Tim. I will get on a compression test. Will do one tonight if I can find a tester somewhere local.

[clarkitect]

Well compression test is in line with the inpa data. Low compression on 3, 5, and 6. 3 and 5 come back up with a squirt of oil in the cylinders which points at rings. More concerning though is cylinder 6. 30psi dry or wet.



For those who can’t read greek:

C D W
1: 180
2: 200
3: 165 180
4: 180
5: 155 180
6: 30 30
7: 200
8: 185

I suppose the next step is to remove the valve cover and inspect the top of the lifter to see if it’s stuck in a compressed position.

On second thought I’m fairly certain this would have bent a valve. This is probably the end of this journey.

You don’t know how disappointing this is.

[Timm]

Really sorry to hear that - that's more than likely caused by a lump missing from an exhaust valve on cylinder 6 - something Kouks is dealing with in another thread.