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OK so just to update everyone. I got a mini heart attack today when i dropped off my car to get the rear bumper painted the car popped a reduced engine power error but no vibration of any sort on the way to the workshop. So i checked with the scanner at the workshop and it showed error 2788 and 2787. They removed the errors and all was good.

A little while later i get a call from the workshop saying that there were misfires on almost all the cylinders and the car was running rough.

When we were troubleshooting the fuel pressure was showing at 1.95 bar at idle which lead us to check the fuel pump. Opened the fuel pump to find one of the pipe had snapped off the clip. Put it back on and issues gone. Wanted to let my friends here with Walbros upgraded know that it is an issue to check if someone faces low fuel pressure.

I am just thinking that the clip was put on tight and snug and it has been done again. I am afraid that could it be coming off due to the extra pressure that the walbros are producing.

What are your thoughts.
 

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OK so just to update everyone. I got a mini heart attack today when i dropped off my car to get the rear bumper painted the car popped a reduced engine power error but no vibration of any sort on the way to the workshop. So i checked with the scanner at the workshop and it showed error 2788 and 2787. They removed the errors and all was good.

A little while later i get a call from the workshop saying that there were misfires on almost all the cylinders and the car was running rough.

When we were troubleshooting the fuel pressure was showing at 1.95 bar at idle which lead us to check the fuel pump. Opened the fuel pump to find one of the pipe had snapped off the clip. Put it back on and issues gone. Wanted to let my friends here with Walbros upgraded know that it is an issue to check if someone faces low fuel pressure.

I am just thinking that the clip was put on tight and snug and it has been done again. I am afraid that could it be coming off due to the extra pressure that the walbros are producing.

What are your thoughts.
Which hoses you talking about? I used clamps that came with my AEM pumps..

Screenshot_20200309-233218_Gallery.jpg
 
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The hose came off the fuel filter.

I am still getting the error p229 low injector pressure at higher rpms in 4th or 5th gear with the twin walbros. Could it be because of the old fuel filter or should I just get new OEM fuel pump?
 

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The hose came off the fuel filter.

I am still getting the error p229 low injector pressure at higher rpms in 4th or 5th gear with the twin walbros. Could it be because of the old fuel filter or should I just get new OEM fuel pump?
When you do the fuel pump you should do the filter at the same time. You're already there and it's coming off anyway. I did it in reverse, I replaced the filter and upgraded the pumps at the same time. I was very suprised mine had original fuel filter at 92k.. 32k miles overdue! Dirty fuel filters are known to cause injector issues which can mess up your motor. For less than 300 bucks for the oem filter, you avoid a potential catastrophic motor damage.
 

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So finally I managed to get some free time and installed the Walbro`s. Pumps work fine so far, did couple of 60-130 pulls and datalog them as well. Now fuel pressure keeps at about 84psi, comparing to the stock ones at 70k miles which were fighting to push at less than 70psi. So far all looks good,in case any problems will keep you posted.
 

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Im thinking about replacing only the individual pumps with original bosch ones instead of buying the whole fuel pump assembly. Do any of you guys know what the part numbers or markings are for the original bosch fuel pumps?

Im assuming they’re common and much cheaper than the actual assembly...

or should i just get walboro or aem pumps instead? Thought people were saying they weren’t compatible with bmw... at the very least i dont want to make too much fuel pressure potentially causing issues with fuel line leaks etc
 

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for the walboro and aem pumps ... did you guys need to buy any of those pre-filters or any other accessories like the socket connectors?
 

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Im thinking about replacing only the individual pumps with original bosch ones instead of buying the whole fuel pump assembly. Do any of you guys know what the part numbers or markings are for the original bosch fuel pumps?

Im assuming they’re common and much cheaper than the actual assembly...

or should i just get walboro or aem pumps instead? Thought people were saying they weren’t compatible with bmw... at the very least i dont want to make too much fuel pressure potentially causing issues with fuel line leaks etc
I have my old oem pumps laying around if you want to buy them for 30 bucks each. They were working with no issues when they were pulled.
 

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I have my old oem pumps laying around if you want to buy them for 30 bucks each. They were working with no issues when they were pulled.
do your bosch pumps have any serial numbers or model numbers etched on its metal casing or anywhere like that?

i want to see if i can get them super cheap separately brand new, as mine only have 57k miles.
 

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So the connector from the bosch one fit? which particular model number of walboro 255lph did you get?

I'm thinking of doing the same job, watching videos I realized that it must be the GSS342 model that brings the input and output aligned.
Anyway I hope someone confirms!
 

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I'm thinking of doing the same job, watching videos I realized that it must be the GSS342 model that brings the input and output aligned.
Anyway I hope someone confirms!
That`s correct, GSS342 is the type you need. Running almost 1000km now and no problems whatsoever
 
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