Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 08-01-2001, 06:30 PM
Registered User
Join Date: Apr 1999
Posts: 2,638
Fuel Pumps and O2 sensor

As some of you know, we have installed a 1995 C36 Engine, tranny, diff
(2.87) and engine computer (ABS and EA is a 1995 E320 wagon), into a
1988 300TE wagon.

I was experiencing intermittant CHECK ENGINE lights and the codes were
pointing to a LEAN CONDITION.
Since we had retained the original two fuel pumps from the CIS M103, I
decided to change the fuel-filter, thinking it may have an obstruction.

After changing the fuel-filter I have gone approx. 3-months without any

Just two weeks ago, I decided to change to a 3.07 limited-slip rear
differential. And the next day, I got a CHECK ENGINE light while going
through stop-n-go traffic in 2nd gear. An OBDII scan showed two codes:
P1132- Manufacture controlled Fuel & Air Metering; and
P0134 02 Sensor Circuit No Activity Detected, Bank 1, Sensor 1.

We checked the O2 sensor, with a VOM and it tested good.
Cleared CODE.
3-days later on a 5-hour drive to San Francisco at a steady 80MPH, the
CHECK ENGINE light comes on.
Same codes. CLEARED it. My mechanic hooked-up a fuel-pressure gauge and
I drove for about 30-minutes, up long grades at full-throttle, just to
see if the two CIS fuel-pumps were either giving too much pressure or
not enough. Pressure was 48PSI at idle at upto to 58 PSI at full
throttle with a long load. CHECK ENGINE did not come on.

However, on a short drive 15-minute drive, the CHECK ENGINE came on.

What to do?

Do I just change out the front O2-sensor? It's a 4-wire one, will any
BOSCH 4-wire work, or do I have to use the Mercedes specific front
O2-sensor at almost 3-times the price?

Should I change out the twin CIS fuel-pumps, and go to the single high
volume, low-pressue fuel-pump of the stock C36?

Should I clean out the MAS sensor?

Any other ideas?

Thanks in advance,
:-) neil
1988 360TE AMG

Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 09:12 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page