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Discussion Starter #1
My freeaakin problem is still there!!!!!! No SES light, but still kicking into
limp mode! They replaced the O2 sensors and fuel press. reg..
He is going to put it on the GT1 again, to see what comes up, he (my tech)
thinks the DME is fried due to all the changes, or just went out. I am
out of town now for a week and a half(about time!), the car is at
the shop, but if all doesnt go well, there will be a car, and many parts
for sale. I miss the car, and sont want it to come to that, but I think
there may be a stop the bleeding point here, It is making me feel quite
dismanl about what could be wrong, and the cost due to it being out of
warranty. I hope it goes well.:sad2:
 

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Hope it all works out for you. The M5 is generally very reliable - I guess you're plain unlucky :(
 

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Discussion Starter #3
Everything was fine til the headers and software went in.

I cant imagine the software doing this, is this any chance a CAT problem?
 

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Give shadowman a call or email. Maybe he can work with your tech to resolve the issue.
 

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Almost sounds like its the MAFS. Or maybe the exhaust cam sensor.
I would ge a second opinion if he thinks its the Dme.

josh.
 

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Discussion Starter #6
Can this be software realted? It doesnt sound so. It happenned a week after
header/sofware install. I was driving normal, then POOF like magic, I have
limp mode, might as well cut the sucker off now. I will have him check the
exhaust cam sensor, and MAF
 

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Stevus said:
Everything was fine til the headers and software went in.

I cant imagine the software doing this, is this any chance a CAT problem?
I recently had an SES light, tech says bad driver side CAT. The light comes and goes, but it is being replaced under warranty. No limp home though, car runs fine, even with light on. If your cat is partially blocked you might get limp home. motatti and I both have similar setups and no limp home. It is possible it is the DME but if BMW installs standard software, it will make the car run lean, so be very careful. I don't think anyone else has had this software problem, so I would say unlikely, not impossible.
Regards,
Jerry
 

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Hey Stevus,

In OZ we only have 2 x O2 Sensors, so we rarely ever get an SES light.

Almost two years and I still have NEVER gotten one.

I put an Auterra on my car the other day as I was checking the idle, getting a digital readout.

It says that MY car is CALIF compliant. :1: It came up on the Auterra. I would have thought ours was Euro.

Anyway, I am no expert on the matter, but I believe there is something in the program about the second lot of O2 sensors and Headers and cats.

I believe if you do Headers, The Software needs to be altered for the rear O2 sensors, and that will stop them playing havoc with SES lights and may solve the limp mode Problem.

I believe Powerchip can do it, but you would have to request it from them. You can talk to them about if there any issues with doing it.

In OZ its all good because they just are not on the car. :cheers:

If you have Headers and Stock Ctas, the headers can fry the cats. If you have aftermarket cats, They play havoc with the second lot of O2 sensors, and this can be fixed with Software. It is not automatically included. You would have to specifically ask for this, and here all the Pro's and cons if any. :flag: It has something to do with the efficiency of the cats confusing the sensors.

Can this be software realted? It doesnt sound so. It happenned a week after
If it were Software related, it would have happened after an Hour.

An easy way to rule out software is to return the car to Stock Software.

A car with Headers will run o.k. on stock software, it will not run dangerously lean on Stock Software. That will rule out Software straight away.

Powerchip Standard software will run lean, if you then later just add headers. So When Powerchip do software FOR HEADERS, They ADD FUEL.
 
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