TheSamba.com :: View topic - HowTo: 1995 Eurovan Camper

Tue May 25, 2021 5:00 pm

Below are instructions on how to replace the MAP sensor on a 1995 Eurovan Camper (and similar models) which is located inside the ECU.
Later models will be located outside the ECU and you do not need to follow below steps.

ECU model:
Siemens
5WP4 228
023906024M

The ECU is located on the drivers side beside the battery area.

1. Uninstall ECU from engine bay
a. First remove the black plastic cover on the ECU. It just lifts straight up.
- The tube going up, under and into the cover is the MAP sensor tube.

b. Unplug the MAP sensor tube.
- It should just pull straight off.
- If it is too hard, you can cut it off and just trim it for reattaching later.

c. Unplug the ECU cable.
- Pull the release latch forward, then up and slowly pry the connector off upwards.

d. Remove 2 philips screws mounting ECU to frame

e. Pull up on the ECU as it has 2 notches on the bottom that snap on/off to fit snugly on the bottom
- I rocked it one way to unclick one then the other way and pulled up to get the other off

2. Disassemble the ECU
- On a repair area (bench), remove the 4 torx screws holding the cover on the ECU

3. Unplug the MAP sensor tube (inside ECU)

Old MAP sensor (here it is already disconnected from the tube inside the ECU).

Motorola
MAP sensor
0006068006
2172AC
KEN 100kPa

New MAP sensor (after much research this is the equivalent and way more available than the original which isn't made anymore):

Bosch Pressure Sensor
1267632013
100 KPA

Search eBay or ask good auto parts places to order it.

4. Remove old sensor
- Remove the 2 orange clips (these just pop off) to keep the clips secure.
- Unsolder the 3 pins on the bottom of the MAP sensor.
- Unclip sensor and push out
- Clean out solder from holes to place new sensor in

5. Install new sensor
- Click new sensor in
- Solder 3 pins
- Put orange clips back on

6. Plug in the MAP sensor tube to new sensor

7. Re-assemble ECU
- Put ECU cover on and use 4 torx screws to secure

8. Install ECU in engine bay
- Push ECU down onto the 2 notches
- Install 2 philips screws
- Plug in ECU cable
- Plug in MAP sensor tube
- Install black plastic cover

9. Use a scantool (OBD 1 compatible) and clear the MAP sensor code (or take to mechanic to clear)

10. Done!
Enjoy a better performing engine!

Tue May 25, 2021 8:43 pm

This is awesome, thanks for the info! Does anyone know if it's the same Part Number sensor for the 93? I'd like to just order one up for the $14 it costs on eBay and keep it in the spares stash.

Tue May 25, 2021 10:46 pm

smores wrote: This is awesome, thanks for the info! Does anyone know if it's the same Part Number sensor for the 93? I'd like to just order one up for the $14 it costs on eBay and keep it in the spares stash.

If you search by your ECU part number on EBay you should be able find which one applies for yours.

From what I've seen, it is most likely the same one :D

Fri Mar 25, 2022 12:07 pm

druuid wrote: Below are instructions on how to replace the MAP sensor on a 1995 Eurovan Camper (and similar models) which is located inside the ECU.
Later models will be located outside the ECU and you do not need to follow below steps.

ECU model:
Siemens
5WP4 228
023906024M

The ECU is located on the drivers side beside the battery area.

1. Uninstall ECU from engine bay
a. First remove the black plastic cover on the ECU. It just lifts straight up.
- The tube going up, under and into the cover is the MAP sensor tube.

b. Unplug the MAP sensor tube.
- It should just pull straight off.
- If it is too hard, you can cut it off and just trim it for reattaching later.

c. Unplug the ECU cable.
- Pull the release latch forward, then up and slowly pry the connector off upwards.

d. Remove 2 philips screws mounting ECU to frame

e. Pull up on the ECU as it has 2 notches on the bottom that snap on/off to fit snugly on the bottom
- I rocked it one way to unclick one then the other way and pulled up to get the other off

2. Disassemble the ECU
- On a repair area (bench), remove the 4 torx screws holding the cover on the ECU

3. Unplug the MAP sensor tube (inside ECU)

Old MAP sensor (here it is already disconnected from the tube inside the ECU).

Motorola
MAP sensor
0006068006
2172AC
KEN 100kPa

New MAP sensor (after much research this is the equivalent and way more available than the original which isn't made anymore):

Bosch Pressure Sensor
1267632013
100 KPA

Search eBay or ask good auto parts places to order it.

4. Remove old sensor
- Remove the 2 orange clips (these just pop off) to keep the clips secure.
- Unsolder the 3 pins on the bottom of the MAP sensor.
- Unclip sensor and push out
- Clean out solder from holes to place new sensor in

5. Install new sensor
- Click new sensor in
- Solder 3 pins
- Put orange clips back on

6. Plug in the MAP sensor tube to new sensor

7. Re-assemble ECU
- Put ECU cover on and use 4 torx screws to secure

8. Install ECU in engine bay
- Push ECU down onto the 2 notches
- Install 2 philips screws
- Plug in ECU cable
- Plug in MAP sensor tube
- Install black plastic cover

9. Use a scantool (OBD 1 compatible) and clear the MAP sensor code (or take to mechanic to clear)

10. Done!
Enjoy a better performing engine! [vimeo][/vimeo][vimeo][youtube][/youtube][youtube][url][/url][url][/url][/youtube][/vimeo]

Thu Mar 31, 2022 8:43 am

Very nice! I was looking for another ECU as with the same part number.

I have a Rosstech but when do you know this has gone bad?

Thu Mar 31, 2022 9:27 am

eurovanpilot wrote: Very nice! I was looking for another ECU as with the same part number.

I have a Rosstech but when do you know this has gone bad?

You can watch the measurement channel (or graph it) for the MAP. If it jumps around a lot at steady state, or fails to respond when you goose the throttle, you've found the problem.

Tue Apr 05, 2022 8:07 pm

On mine the lambda sensor (O2) was pegged lean all the time when looking at it in Rosstech. Plus throttle response was laggy.

eurovanpilot wrote: Very nice! I was looking for another ECU as with the same part number.

I have a Rosstech but when do you know this has gone bad?

Tue Apr 12, 2022 9:49 am

TheOneTrueQuux wrote: eurovanpilot wrote: Very nice! I was looking for another ECU as with the same part number.

I have a Rosstech but when do you know this has gone bad?

You can watch the measurement channel (or graph it) for the MAP. If it jumps around a lot at steady state, or fails to respond when you goose the throttle, you've found the problem.

Nice thanks!

Tue Apr 12, 2022 9:49 am

smores wrote: On mine the lambda sensor (O2) was pegged lean all the time when looking at it in Rosstech. Plus throttle response was laggy.

eurovanpilot wrote: Very nice! I was looking for another ECU as with the same part number.

I have a Rosstech but when do you know this has gone bad?

Great thanks!

Tue Apr 12, 2022 9:51 am

I see one capacitor? I would change it also if I'm in there with a Japanese part.

Mon May 16, 2022 11:10 am

Would a faulty map sensor cause rich fuel mixture? My 93 mv has been rich for years and get unacceptable gas mileage age. I think it's in limp home mode about once a month I have to clean the plugs.. Nobody can seem to sort it out so I only drive close to home 20 miles away.. I ve checked everything elso out but mine and it seems everybody's else skill is too limited.. I like the van but after driving splits & Mosly Bays this one has me stumped ..It too old & and too new in.. Yup. Bill

Tue May 17, 2022 6:53 am

volkybus wrote: Would a faulty map sensor cause rich fuel mixture? My 93 mv has been rich for years and get unacceptable gas mileage age. I think it's in limp home mode about once a month I have to clean the plugs.. Nobody can seem to sort it out so I only drive close to home 20 miles away.. I ve checked everything elso out but mine and it seems everybody's else skill is too limited.. I like the van but after driving splits & Mosly Bays this one has me stumped ..It too old & and too new in.. Yup. Bill

Based on my experience, and what I have read of others struggling with, it could have that effect. If you have tried everything else, it might be worth trying. When I replaced mine, my van ran so much better. Was having starting issues when warm, seemed to be running rich, and would shut off when backing up and pulling forward at part throttle. Good luck.

Tue May 17, 2022 6:54 am

volkybus wrote: Would a faulty map sensor cause rich fuel mixture? My 93 mv has been rich for years and get unacceptable gas mileage age. I think it's in limp home mode about once a month I have to clean the plugs.. Nobody can seem to sort it out so I only drive close to home 20 miles away.. I ve checked everything elso out but mine and it seems everybody's else skill is too limited.. I like the van but after driving splits & Mosly Bays this one has me stumped ..It too old & and too new in.. Yup. Bill

It could (though, I'll admit I don't know if/how the OBD1 ecu would default to Alpha-N if the MAP sensor were not functioning).
A simple way to check would be to remove the ECU/MAP vacuum line at the manifold; if doing so causes no change in driveability, then either the MAP sensor is bad, or that vacuum line has a large leak somewhere.

I'm more inclined to suggest checking for a vacuum leak(s) as that may cause the fuel pressure regulator to not reduce fuel pressure under high-vacuum, and/or cause the MAP reading to be elevated to the point where the ECU 'thinks' the engine load is greater that it really is.

Sun May 29, 2022 9:24 am

Looking at vacuum lines/hoses online and am not with my van at the moment—is the one running to the MAP sensor on the ECU a 3.5mm ID x 7mm OD?

Mon May 30, 2022 6:38 am

Great to-do post

Mon May 30, 2022 2:39 pm

I think so diameter wise but the length seems about 2 ft. I wish there was a old school way to do these checks..OBD1's are hard to come by so I prefer simple ways to do things...I hit a nice VW show & campout over the weekend about 200-300 VW vans camping out..6 Eurovans.100 +Vanagan,125+ Bays & maybe 30-40 splitties.+ Every other VW ever made including a 46 split bug the guy DROVE 75 MILES each way with his buddies in their ovels..I only saw one Trailer queen. Thanks for aLL THE help & I Will get this sorted out sooner or later...Anyway this is my island camper
.I'm headed up to New England to drive my real bus for
Summer & fall & find some parts.Good Luck..keep em goinHope to see some of u in a show and or
Campout soon...Bill (76 Westy ...the green Slime+93 Eurovan weekender .jE mail me (Black n Blue Bomb)

Thu Jun 02, 2022 11:37 am

Well I finally got the nerve up to t byake out the Ecu to p huh well I findok it apart cleaned the connection & called my Euro auto supply house but they can't un

find a new mafs .I installed a spare Ecu but it wouldn't even start so after taking a picture of the MAFS I put it back together and reinstalled it. And it started . I unplugged and checked the vacuum line ...all good & tight unplugged the engine ran a little bit faster..oh well maybe that's not the problem & somebody already had swapped out the MAFS...I don't Dr III ve much w this van anyway I just mostly drive my Jetta w gas so highnow Bill

Wed Jun 12, 2024 2:11 pm

Does anything need to be done to reset the ECU once the new MAP is installed?

I ask because I came across this post on another forum:

https://www.vwvortex.com/threads/1993-eurovan-t4-ecu-removal-and-reset.5442640/

Wed Jun 12, 2024 3:51 pm

I replaced the MAP sensor. I didn't know there was a need to reset(?) Anyways, it has been working fine for the past 2+ years.

Wed Jun 19, 2024 6:37 am

Replacing the MAP sensor mad a huge difference but now the engine idles fast (2000 RPM) and idle Fluctuates (low/high) whether engine is hot or cold.

Kinda stumped now