Engine malfunction/too rich after fixing injectors
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Joined: Jul 2014
Posts: 45
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From: Indiana
My Ride: 325i
Just a bit of an update. I used MHD to continue to clear codes. I noticed very apparent misfires when MHD connected to the ECU each time. One time it even totally killed the engine.
That being said, it is running better now. The only lagging issue is the "engine malfunction" light that shows up when I am WOT in 3rd gear around 5500 rpm. I feel no misfire and there are not any engine lights other than the malfunction indication. When I pull DME info right after the malfunction indication i get a "30FF - Turbocharger, charge-air pressure too low" but it runs fine anyways. After a restart, the lights are gone again until I do a hard pull through 3rd gear and it'll come back.
That being said, it is running better now. The only lagging issue is the "engine malfunction" light that shows up when I am WOT in 3rd gear around 5500 rpm. I feel no misfire and there are not any engine lights other than the malfunction indication. When I pull DME info right after the malfunction indication i get a "30FF - Turbocharger, charge-air pressure too low" but it runs fine anyways. After a restart, the lights are gone again until I do a hard pull through 3rd gear and it'll come back.
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Joined: Oct 2009
Posts: 1,380
Likes: 4
From: Indiana, USA
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
You could have a boost leak.
Places to check:
- Check the plastic charge pipe going to the throttle body (these like to crack)
- Check the diverter valve connections
- Check the connections to the intercooler
- You could have bad wastgate solenoid(s)
- Check all the vacuum lines especially to the wastegates
Are you near Northern Indiana?
Places to check:
- Check the plastic charge pipe going to the throttle body (these like to crack)
- Check the diverter valve connections
- Check the connections to the intercooler
- You could have bad wastgate solenoid(s)
- Check all the vacuum lines especially to the wastegates
Are you near Northern Indiana?
Thread Starter
New Members
Joined: Jul 2014
Posts: 45
Likes: 0
From: Indiana
My Ride: 325i
You could have a boost leak.
Places to check:
- Check the plastic charge pipe going to the throttle body (these like to crack)
- Check the diverter valve connections
- Check the connections to the intercooler
- You could have bad wastgate solenoid(s)
- Check all the vacuum lines especially to the wastegates
Are you near Northern Indiana?
Places to check:
- Check the plastic charge pipe going to the throttle body (these like to crack)
- Check the diverter valve connections
- Check the connections to the intercooler
- You could have bad wastgate solenoid(s)
- Check all the vacuum lines especially to the wastegates
Are you near Northern Indiana?
I'm about an hour north of Indy. Where are you located?
Senior Members
Joined: Oct 2009
Posts: 1,380
Likes: 4
From: Indiana, USA
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
The vacuum system will hold a vacuum for a while after the car is turned off. A good test is to pull one of the vacuum lines off and you should hear a woosh of air if there is still a vacuum. If there is no vacuum, then there is a leak. If all the vacuum lines are original you should just replace all of them anyway. Be sure to slice the vacuum line where it connects to a plastic nipple or use a pick type tool to insert and break the connection loose. Those plastic nipples will break off.
Short of just a visual inspection of the intercooler connections, you would have to do a pressure test or smoke test to check for leaks.
I'm further north in South Bend
Short of just a visual inspection of the intercooler connections, you would have to do a pressure test or smoke test to check for leaks.
I'm further north in South Bend
Thread Starter
New Members
Joined: Jul 2014
Posts: 45
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From: Indiana
My Ride: 325i
Just so anyone else comes upon this thread. I ended up buying 4mm vacuum lines from verocious motorsports online. I ended up just swapping out the lines between the diverter valves, intake manifold, etc. I ran some compressed air through the DVs while they were out and everything is back to normal.
Senior Members
Joined: Oct 2009
Posts: 1,380
Likes: 4
From: Indiana, USA
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
Just so anyone else comes upon this thread. I ended up buying 4mm vacuum lines from verocious motorsports online. I ended up just swapping out the lines between the diverter valves, intake manifold, etc. I ran some compressed air through the DVs while they were out and everything is back to normal.
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Jan 26, 2014 12:14 PM