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General E46 Forum
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Old 01-16-2015, 10:48 PM   #1
DavidValentino
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Join Date: Jan 2015
Location: Cen Cal
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My Ride: 2000 328ci
** e46 m52/m54 tuners please help **

Just purchased a 2000 328ci with 165K on the original motor and transmission.

Been doing all the work myself bringing life back to this car.

My question is this.

I plan to perform the follwing repairs:

1. Remove and clean the ICV aka Idle Control Valve
2. Replace both Lower and Upper Intake Boots
3. Remove and clean Throttle Body
4. Replace MAF - Mass Air Flow Sensor
5. Replace both UPSTREAM O2 sensors

Parts already purchased and doing this to rid me of CEL/SES light on dash.

My question is this:

Will I see a performance difference after doing this?

She doesn't have much pep taking off from a dead stop but once she gets going she flies!
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Old 01-17-2015, 03:38 AM   #2
Alex323Ci
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sure.
but the thing you might consider fixing are the Vanos seals. that makes these M52TU and M54 engines a bit of a dog on take-offs.

you should buy the "PA Soft" and then read your codes. this will help fix your issues.

you say you have a 2000 328Ci, you should edit your user info because it says 330ci. the 328Ci is a great car, take pride in your model

lastly make sure your new car has had the subframe issue fixed/inspected. 2000 wasn't known for great floors.
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Old 01-17-2015, 04:02 AM   #3
Megalocnus
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Your decision to replace said parts is based on what DTC codes? Often times MAF (as well as oxygen sensor) codes can be caused by vacuum leaks.
At this mileage I'd replace the pre-cat O2 sensors preventively anyway. Not so sure about the MAF though.
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Old 01-17-2015, 04:22 AM   #4
DavidValentino
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Quote:
Originally Posted by Alex323Ci View Post
sure.
but the thing you might consider fixing are the Vanos seals. that makes these M52TU and M54 engines a bit of a dog on take-offs.

you should buy the "PA Soft" and then read your codes. this will help fix your issues.

you say you have a 2000 328Ci, you should edit your user info because it says 330ci. the 328Ci is a great car, take pride in your model

lastly make sure your new car has had the subframe issue fixed/inspected. 2000 wasn't known for great floors.

GREAT INFO ALEX ! I will definitely add the Vanos seals to my long list of repairs. I appreciate the info!
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Old 01-17-2015, 04:28 AM   #5
DavidValentino
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Quote:
Originally Posted by Megalocnus View Post
Your decision to replace said parts is based on what DTC codes? Often times MAF (as well as oxygen sensor) codes can be caused by vacuum leaks.
At this mileage I'd replace the pre-cat O2 sensors preventively anyway. Not so sure about the MAF though.
Codes showing are P1188 and P0130
Top intake boot has electrical tape wrapped around it.
Judging by what I have found while performing repairs and maintenance stuff
I am pretty sure the boots have never been replaced.
My OCD doesn't help things either

But since I was gonna have to go thru all the steps to replace the boots I figured why not clean the ICV and TB, I can only imagine what I'll find !
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Old 01-17-2015, 04:41 AM   #6
DavidValentino
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My Ride: 2000 328ci
In the first 30 days this is what I have fixed or replaced.

Day 2- oil change, spark plugs, valve cover gasket, oil and air filters, expansion tank and transmission temp thermostat.

ATF Fluid and filter change- two more to go
DIFF Fluid change
Brake pads front and rear
Water pump, belts, hoses, thermostat, temp sensor , pulleys, fan clutch
radiator fan control module
Faulty trunk latch- got rid of annoying trunk open light on dash
Oil Level Sensor

TO DO LIST:

Both intake boots
MAF Sensor
Upper O2 Sensors
Clean ICV
Rep. CCV
Clean TB
Brake Rotors
Flush and Bleed Brake Fuid
Vanos Seals
Front Lower control arms and Bushings
Front and rear shocks
GM5 repair- Door Lock Issues

Then on to the fun stuff after all that

Last edited by DavidValentino; 01-17-2015 at 11:28 PM.
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Old 01-17-2015, 07:39 AM   #7
Megalocnus
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Quote:
Originally Posted by DavidValentino View Post
Codes showing are P1188 and P0130
Top intake boot has electrical tape wrapped around it.
Judging by what I have found while performing repairs and maintenance stuff
I am pretty sure the boots have never been replaced.
My OCD doesn't help things either

But since I was gonna have to go thru all the steps to replace the boots I figured why not clean the ICV and TB, I can only imagine what I'll find !
Your MAF is probably fine. Cleaning ICV and TB can't hurt, but it would have made more sense to continue in this direction by replacing the CCV system.
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Old 01-19-2015, 04:21 PM   #8
Willie00328I
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I would change all of your small vacuum line with the new silicone braided line from the dealer. The old rubber gets brittle and cracks. CCV is a good idea. Those old CCV hose get very brittle too

Don't forget to change the air distribution manifold O-rings

http://m.ebay.com/itm?itemId=181514849852
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Old 01-20-2015, 09:33 PM   #9
DavidValentino
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My Ride: 2000 328ci
Quote:
Originally Posted by Willie00328I View Post
I would change all of your small vacuum line with the new silicone braided line from the dealer. The old rubber gets brittle and cracks. CCV is a good idea. Those old CCV hose get very brittle too

Don't forget to change the air distribution manifold O-rings

http://m.ebay.com/itm?itemId=181514849852
Thanks Willie I will look into those lines.
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Old 01-21-2015, 08:47 AM   #10
markusmarkus
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My Ride: 2001 330Ci
OP, there's no reason to replace the MAF. They are one if the most reliable and long lived parts.
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