MMP M62B44 Build Project "Jack-N-Coke"

[MonkeyMadness]

[ATTACH]99254[/ATTACH]

[ATTACH]99255[/ATTACH]

[ATTACH]99256[/ATTACH]

[ATTACH]99257[/ATTACH]

[ATTACH]99258[/ATTACH]

[MonkeyMadness]

So this happened this weekend..











Then this Happened... its was cool....

[MonkeyMadness]

thinking of going to the Lowlife euro meet today at Irvine Park. I will post up vid and pic's

[MonkeyMadness]

Damn.. Cars reg and Smog??? got tags and paperwork today...

Bitch be my new Daily Driver....!

I better start saving money now. i have a feeling I'll need it for tires soon

[MonkeyMadness]

Normally your DME will be in closed loop mode, meaning it uses feedback from the o2 sensors, which tell the DME what the AFR is. If it's too lean, it adds more fuel. Too rich, less fuel. If it doesn't get a proper signal from the o2 sensors, it goes into open loop mode, meaning it uses the other sensors (MAF, coolant temp, etc...) and the factory preset tables to provide safe fueling. It has no feedback from the o2 sensors, so it doesn't deviate from the preset tables. Normally, with working o2 sensors, your fuel trims will change as your DME learns what conditions require changes in fueling to hit the ideal AFR. Since you have no AFR feedback, it doesn't adjust the fueling. So your AFR likely won't be on target, but the factory DME does a fine job of running the engine safely anyway. A potential long term effect would be damage to catalytic converters, if you have them.

Again, this is all assuming the CEL is for the o2 sensors. It could be for something unrelated, like the purge valve for the charcoal canister, which has no real impact on anything. So I wouldn't do anything until you get that code pulled. But, I wouldn't be worried to drive it in the meantime if it's running fine. Just my opinion.

Cool thanks.. Just what I needed to hear. If it pops up again this weekend I'll pull the code and post up. I'm pretty sure I know what it is but to satisfy you all and my self I will let you know..

[JGood]

What do you mean by this? : It won't go into closed loop unless it gets a valid/within spec signal from a few major sensors (coolant temp, O2's, etc...) but that won't hurt anything short term
What will happen long term???

Normally your DME will be in closed loop mode, meaning it uses feedback from the o2 sensors, which tell the DME what the AFR is. If it's too lean, it adds more fuel. Too rich, less fuel. If it doesn't get a proper signal from the o2 sensors, it goes into open loop mode, meaning it uses the other sensors (MAF, coolant temp, etc...) and the factory preset tables to provide safe fueling. It has no feedback from the o2 sensors, so it doesn't deviate from the preset tables. Normally, with working o2 sensors, your fuel trims will change as your DME learns what conditions require changes in fueling to hit the ideal AFR. Since you have no AFR feedback, it doesn't adjust the fueling. So your AFR likely won't be on target, but the factory DME does a fine job of running the engine safely anyway. A potential long term effect would be damage to catalytic converters, if you have them.

Again, this is all assuming the CEL is for the o2 sensors. It could be for something unrelated, like the purge valve for the charcoal canister, which has no real impact on anything. So I wouldn't do anything until you get that code pulled. But, I wouldn't be worried to drive it in the meantime if it's running fine. Just my opinion.

[MonkeyMadness]

The 404 DME doesn't have a 'limp mode'. It won't go into closed loop unless it gets a valid/within spec signal from a few major sensors (coolant temp, O2's, etc...) but that won't hurt anything short term. Half of r3v probably has their 02 sensors disconnected haha.

Without codes, can't really help, but first thing I'd verify is that you have the o2's hooked up correctly. IIRC, the longer harness goes to the drivers side.

I'm running a 93 530 harness and the o2 leads are equal length but i was able to find tags on the leads that indicated L or R so I hope I have it right. If not its not that hard to switch. But this is why I asked. Worst comes to worst I'll just run unplugged?

What do you mean by this? : It won't go into closed loop unless it gets a valid/within spec signal from a few major sensors (coolant temp, O2's, etc...) but that won't hurt anything short term
What will happen long term???

I haven't touched that car sense this weekend. I'm in the middle of another build that has taken a bit of my time.

[Denny]

Well, it's not what you can actually do with MS3. The problem is, do you know how to do it??

yeap exactly... too many people bring MS down and haven't tuned a day in their life to be in a position to compare.. or even use all the processing power. Hell you got guys running really old tiny processors MS1 on LSX motors just fine...

I'm running MS2 ver3.57 and got more then plenty of processor power even moving to MS3 for the extra money and slight benefit to run sequential isn't even needed...

anyways that's my REAL EXPERIENCE on the subject ... sorry didnt want to highjack the thread... feel I needed to clear the misinformation.

[Yorl]

Well, it's not what you can actually do with MS3. The problem is, do you know how to do it??

[Northern]

I could believe that even an old Bosch OBD1 DME has more processing power/is more advanced than MS3. Just looking at the tables in the MS41 DME makes me realize the crazy amount of tables and corrections go into making an engine run "properly" vs what I can do in TS with MS2

[JGood]

Well, I was referring to the processing power. But now I see he was referring to MS3 anyway, so I retract my statement in that aspect.

Still, the DME/software is not to blame here. Obviously there is a sensor/input problem. Which can easily be isolated by simply pulling the codes.

[Denny]

The 404 DME doesn't have a 'limp mode'. It won't go into closed loop unless it gets a valid/within spec signal from a few major sensors (coolant temp, O2's, etc...) but that won't hurt anything short term. Half of r3v probably has their 02 sensors disconnected haha.

Without codes, can't really help, but first thing I'd verify is that you have the o2's hooked up correctly. IIRC, the longer harness goes to the drivers side.

This particular "dme shit" is light years more advanced then MS, at least for N/A use. And it's nice that it's throwing a code, now you know that something is wrong...

Too bad your far away I would invite you in for a ride in my car and show you how I can control damn everything in this car... then you tell me if MS is light years behind...(yeah it was a pain to setup not much info out there but I got it running!! and documented I could replicate my setup so easy now) In the REAL world nobody needs ALL the shit that BMW has in there to control this engine including B.S EWS... and now you can actually tuned it properly (N/A or boosted) and get rid of 25 pound of wiring too.. loll...

[JGood]

The 404 DME doesn't have a 'limp mode'. It won't go into closed loop unless it gets a valid/within spec signal from a few major sensors (coolant temp, O2's, etc...) but that won't hurt anything short term. Half of r3v probably has their 02 sensors disconnected haha.

Without codes, can't really help, but first thing I'd verify is that you have the o2's hooked up correctly. IIRC, the longer harness goes to the drivers side.

This particular "dme shit" is light years more advanced then MS, at least for N/A use. And it's nice that it's throwing a code, now you know that something is wrong...

[MonkeyMadness]

I disconnected the 404 after I shut the car down and walked away...
I didn't even do the stomp test. I was a tad bit peeved and not really wanting to fuck with it or let it ruin my day. lol

I'll plug it in tonight and run it to see if it comes back, then I'll do a stomp test...


I really need to ditch this dme shit and go to the MS3 but I wanted to wait till I had my SC setup... ugh

[36brua]

have you tried to 'clear' the chk light? disconnect bat. let sit for a few minutes reconnect drive and see what happens. which side 1-4/ 5-8 ?