In the 2.5 bar E38 custom operating system I'm pretty sure you can't 0 the maf table out or it will create issues, our head engineer has posted about this a few times in the past.
In the 2.5 bar E38 custom operating system I'm pretty sure you can't 0 the maf table out or it will create issues, our head engineer has posted about this a few times in the past.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
Really? I've never had a problem setting them to zero. Some of the older 411s would get a little funky if you set em to zero, but never had a problem with the E38s. Just went back and looked at a half dozen of them to make sure.Originally Posted by Bill@HPTuners
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The lower fuel pressure will help with fuel pump output as well. Fuel pumps will drop flow as pressure increases so if you are running a boost referenced system and you are starting out at 58 psi and running 15 lbs of boost. Now, you are at 73 psi and pump output is dropping off quickly. If you size the injectors accordingly for a lower pressure, you don't have to run as much pump to satisfy the power requirements.
Jaime
Are they enhanced OS though?...
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Bill I followed the instructions as per your demo on your site on how to create a 2.5bar setup and it said you could 0 out the maf if you are not using it.
in my ls1 Vett 99 pcm I went 2bar and 0 out the maf.
So my question is how do I make sure the car is reading from VE and not the maf. I don't care if the Maf stays connected and not zeroed out but how do I know the PCM is getting fuel from the Ve table
LS1 PCMs are totally different.
If P0101, P0102, or P0103 is an active DTC, then it is in speed density.
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Not sure what your question is, but I was referring to the 2 bar COS in the E38s. I have many of them set to zero in the MAF fail and they work just fine.
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That's what I'm referring to. Enhanced/custom/voodoo operating system. When you said you've zeroed the MAF and it works, I was asking if those you verified were using the 2.5 bar OS.
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Ok so to get it straight on this pcm to fail the maf I need to set P0101, P0102, P0103 SES enabled, and set them to 2-no mil light. Is there anything else that I need to change.
I have already set these SES and still in the Scan I don't see any DTC come up. I really think the car is not going into MAF. All I can do is contact support it might have something to do with the beta software. Unless there is anything else you guys can think of.
Fill the MAF table with the max values and try starting it. See what happens.
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Yes. In the 2.5 bar OS, I can set the MAF fail to zero, and it works just fine. I do it all the time.
No. Uncheck the SES enable box. Set all the codes to 0=MIL on first error, which is essentially fail on first error. This should enable SD instantly. Set your MAF fail high to zero, or something like 12 if you think it may be an issue. I don't have any issues with the E38s setting the MAF fail to zero.
PS, I looked at your tune, and it looked like you had everything setup just fine to go into SD. Only thing I did was set your dynamic air to 8000. You had it set to 100 or something.
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I always set the fail to zero... Just never zero out the MAF calibration.
I'm not sure what would cause his to not go into SD. When I tune a MAF, I set the dynamic air values to zero, then fail the MAF with those dynamic values still at zero to do SD and it never has a problem tripping over.
OP, the reason I mentioned leaving SES checked is so you can see the check engine light come on to indicate that it's in SD (assuming no other codes).
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I think you and Steck have your wires crossed.
If I read it right, he is referring to the MAF Transfer Table, not the MAF Fail value.
EDIT: Crap, beat me to it. ^^^^
Jaime
I will try this and see what happens tonight. If not I might just tune it with MAF and send the file to the guys @ support and see what they can come up with.
I zero the table too. Always. Just something I always do.
I agree with leaving the SES light checked so you know if it fails.
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Thanks DSteck and edcmat-l1. I was able to finally get the maf to fail. I combined everything you both told me. Also the previous tuner had some error codes to not test the maf and also to not show the SES. I enabled those as well. I wonder if that was the problem all along. Either way I will post this tune once I get it driving so it others could use it as a base.
Now I am having trouble getting it driving good. I have this Autometer WB which suckssss.
Thanks again guys
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