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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-21-2012, 07:41 AM   #21
Drewfus2101
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Originally Posted by serdar255 View Post
Thanks, but what circuit board do we use, can you take pics of your circuit board finished?
The board is just a plain 'breadboard' type board. It's just got a bunch of holes, so that the legs of the components will stick through there, and you'll be able to glue and solder the wires from one component to the other. Radioshack carries a few good ones that will work.

I should have taken pics of that part.
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Old 05-21-2012, 08:29 AM   #22
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The board is just a plain 'breadboard' type board. It's just got a bunch of holes, so that the legs of the components will stick through there, and you'll be able to glue and solder the wires from one component to the other. Radioshack carries a few good ones that will work.

I should have taken pics of that part.
can you send me a link to the one you used and a picture of the circuit?
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Old 07-16-2012, 05:11 PM   #23
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If anyone is still in need of a SAP sim I have some available:

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Old 07-17-2012, 07:28 AM   #24
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If anyone is still in need of a SAP sim I have some available:

pmd

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Old 07-29-2012, 03:17 PM   #25
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sap sim works awesome! so far no cel or issues. car: 2001 325i

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Old 07-29-2012, 04:15 PM   #26
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sap sim works awesome! so far no cel or issues. car: 2001 325i

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Nice, glad you got it installed. I have 4 more of these right now if anyone else is interested.

Last edited by gpeterson; 07-29-2012 at 10:54 PM.
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Old 07-29-2012, 08:12 PM   #27
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Nice, glad you got it installed. I have more more of these right now if anyone else is interested.
im considering buying another in case a resistor burns out over time

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Old 07-30-2012, 06:34 PM   #28
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car threw a cel. im gonna make sure nothing came undone and ill see what the code is. i have a feeling the e46 is too smart for a sim

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Old 07-30-2012, 06:46 PM   #29
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car threw a cel. im gonna make sure nothing came undone and ill see what the code is. i have a feeling the e46 is too smart for a sim

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Ok, please let me know what the code is. If it is SAP related I can either figure it our or we can do a return & refund.
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Old 07-30-2012, 06:47 PM   #30
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Ok, please let me know what the code is. If it is SAP related I can either figure it our or we can do a return & refund.
ill let you know asap. thanks
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Old 07-31-2012, 04:21 PM   #31
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p0491 & p0492.

secondary air pump

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Old 07-31-2012, 09:22 PM   #32
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p0491 & p0492.

secondary air pump

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Sending you a PM.
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Old 08-28-2012, 08:04 PM   #33
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well i was interested in this...but i don't want the cel.

the question is are they mutually exclusive?
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Old 08-29-2012, 07:32 AM   #34
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well i was interested in this...but i don't want the cel.

the question is are they mutually exclusive?
The point of building this sim is that you won't get a CEL when removing the SAP.
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Old 08-29-2012, 08:17 AM   #35
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Understood, but it did not work out that way for IrocThe325i.

IrocThe325i, did you get it figured out?
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Old 08-29-2012, 08:43 AM   #36
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Understood, but it did not work out that way for IrocThe325i.

IrocThe325i, did you get it figured out?
im sure it has something to do with the amount of resistance to an e46 sap than an e36 sap.

or the fact that e46s possibly use different 02s.

in theory the sim should work. maybe someone will have more luck with it

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Old 08-29-2012, 11:06 AM   #37
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The sim works (edit: the design definitely works). I ran the one that I described in detail, for quite a while, without any problems. It sounds pretty complicated, but it really isn't. And it's really easy to bench test for faults.

The car might be complicated, but the way the car uses the SAP isn't, and what it is looking for with the SAP is very simple.
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Old 08-29-2012, 03:26 PM   #38
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@ gpeterson, is your build based off of the Drewfus2101 design?
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Old 08-29-2012, 04:55 PM   #39
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@ gpeterson, is your build based off of the Drewfus2101 design?
It is similar, but mine has a few extra components to stabilize the output voltage and absorb back EMF from the relay.

Note - I've sold lots of them to e36 owners and had a zero return rate. I sold one to an e46 owner and he got a CEL after a while. He wasn't local so I couldn't troubleshoot, but I can't guarantee my SIMs work on the e46.
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Old 08-29-2012, 06:41 PM   #40
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It is similar, but mine has a few extra components to stabilize the output voltage and absorb back EMF from the relay.

Note - I've sold lots of them to e36 owners and had a zero return rate. I sold one to an e46 owner and he got a CEL after a while. He wasn't local so I couldn't troubleshoot, but I can't guarantee my SIMs work on the e46.
Can you send me a link to the board you used or something you recommend?
Thanks
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