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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > JB4 HPFP! Help



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      02-02-2013, 09:12 PM   #1
gvaldes13
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JB4 HPFP! Help

I just got my jb4 installed wed everything was great. Today I was on a date and the half engine sign popped up along with the service engine soon talk about bad timing. This would be my second hpfp in the last 4 months. Did the jb4 have anything to do with it? Also will bmw perform the recall with the chip installed if I put it on map 0? Thanks in advance
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      02-03-2013, 09:00 AM   #2
Juiced46
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Those warnings do not necessarily mean its an hpfp. It could be a ton of other things.
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      02-03-2013, 09:32 AM   #3
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If you have a JB4, what were the codes you threw? I had issues at first with the JB4 and it turned out that I had connected some of the wires incorrectly (pin out type).

About a year later I had some issues and one of the wires had come loose. I had to shut off JB4 and the car ran as it should until I fixed the wire issue. When in doubt, shut it off.

On occassion I will get codes for things such as boost issues, typically when temperatures change.

Having the ability to check codes while driving is a great tool.....found out my water pump was going to die soon, replaced it. Just found out my HPFP was going to die, replaced that.

When you throw a code, find out what it is, clear it. Turn off JB4 to see if the problem comes back. If it comes back it aint the JB4.
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      02-03-2013, 10:31 AM   #4
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29CF was the code I got which is misfire cylinder 3. I just figured out how to read codes. What should be my next step?
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      02-06-2013, 07:37 PM   #5
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Swap coil # 3 to a different cylinder. If the code comes back and moves to a different cylinder its the coil. If not most likely an injector issue or possibly a plug issue
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      02-15-2013, 06:40 AM   #6
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Quote:
Originally Posted by gvaldes13 View Post
29CF was the code I got which is misfire cylinder 3. I just figured out how to read codes. What should be my next step?
Did you fix the problem or did the code come back? I don't think I ever saw a misfire on the car and I'm at 120K?
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