SOLVED Ekpm issue?

Mzfhartge

Specialist
Aug 17, 2017
63
18
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Somerville, Ma
Ride
07 bmw 335i
Trying to figure out why i don’t have power to the fuel pump. Ekpm2 seems it has power to it but says disconnected to pump.(see picture protool) Anyone knows if values goes up and down as mine does on voltage fuel pump on ignition on? It does not read the same for one second, it keep changing and does not go to 12v for sure?
Car is an early build 2007 so no fuel relay(that i can find, only fuse that has power to it).
Bucktless dual pump 535 primary and secondary on hobb switch.
Swapped ekpm2 with my friends same year car and same thing? Does it need to be coded when swapped from same year car?
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martymil

Major General
Sep 6, 2017
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Looks like maybe your battery is on its way as its reading 11.6 volts which is way to low.

have you got a mutlimeter and know how to use it ? its ok if you don't

was it running before or a fresh install.
 

Mzfhartge

Specialist
Aug 17, 2017
63
18
0
Somerville, Ma
Ride
07 bmw 335i
Battery is down cause i left the doors open for couple days now trying to fix this issue. Battery is getting charged now. Here is how it all started.
I noticed a leak underneath the car under driver side by the back tire. Followed it and sure enough the driver side top hat was leaking? No clue how it happened(pic attached). I bought a new one from Pfs, the one with no filter/bypass comes all assembled with new hat and i bought new lines from precision and the external fuel pressure since i am going to tackle the fuel. My friend is helping me doing the job after work so i jacked it and put it on stand , removed the connector to the fuel pump, started the car, it ran for couple seconds and then it died(to remove fuel pressure from the lines before we disconnect them) He replaced the driver side hat and he had to take the fuel pump assembly (passenger side) out cause there is three siphon lines that goes from driver to passenger side and had to delete one cause the bucketless does not have a connection and neither the new top hat. He then installed the new upgraded lines from the top hat driver side to the ethanol sensor and new small one from ethanol sensor to the y connection by the pi and Lpf sensor. It was getting late so we called it a day and decided to finish installing the external fuel pressure and the new lines that goes back to driver side on Saturday. He installed the bucktlesspump back in cause i had to move the car from where it’s sitting so i can use the bay at the garage(no fuel pressure regulator i know but at least it should start)
No power to the fuel pump connector. I swapped his ekpm2 from his car both 2007 cars and car still does not have power to the connector. I checked continuity on the wire from ekpm to the pump and wire is fine using the multimeter. I ordered a used ekpm3 from ebay and planning on coding it using protool cause i don't want to mess up his working ekpm2. Bucktless primary is the 535 one so that one does not have a check valve would it get damage if i ran the fuel lines empty? The only thing i haven’t tested yet is to jump the fuel pump but it was working fine before and it is brand new with few miles on it( i barely drive the car mostly idle to remove it from it’s spot and starts every time on the coldest day with full e85 in it without a hiccup)
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Mzfhartge

Specialist
Aug 17, 2017
63
18
0
Somerville, Ma
Ride
07 bmw 335i
There is no power coming to the connector of the pump from ekpm2. I tried crossing wires still no power to it. I will take it apart for the ten times and takes pictures of it see if we did something wrong.
 

Mzfhartge

Specialist
Aug 17, 2017
63
18
0
Somerville, Ma
Ride
07 bmw 335i
Thanks for the quick reply man i really appreciate it. when checking the connectors i am cranking the car. Ekpm3 will arrive on tuesday and i will try that, but do you think the low fuel pressure sensor would cut power to the pump if got busted will we installed the new line going to the Y connection for pi and sensor?
 

martymil

Major General
Sep 6, 2017
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What you have to do is turn the pump on with protools whilst the cars ignition is on but not running then set the fpr to 75 psi.

Make sure you do not run a boost reference line to the fpr.
 
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