"more problems" ???

Im to a point of popping the oil drain plug and locking the fuel feed to the max in an effort to find out which piston blows the furthest.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Well that could be a release for the frustration.

Do you have a plan for the next thing to check or are you thoroughly pissed off?

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Just trying to recall the little I remember about what Stretch calls Electrotrickery

Lets say you have a 120v lamp with a 100W bulb. You turn it on and you get 100W output. From Power = V*I, I=100/120= 0.833A. Power also is (I^2)R so R=P/(I^2) or 100/(0.833*0.833)=144.11ohms.

Now you connect four 100W lamps in series and connect 120v across the string of bulbs. You do have a 400W system, but do you get 400W of output?

You get a current of V/R or 120/(4*144.11)=0.21amps. So each lamp puts out (I^2)R or (0.21*0.21)*144.11*4= ~25 watts. So string of lamps still provides about 100watts output. (probably in practice less)

If you want 400watts output, then you would need 4x120V=480volts. Then you would get 480/(4*144.11)=0.833Amps (each bulb gets same as single bulb on 120v!) Now you would get 400watts of output!

So Power may be additive, but Power Output only if current remains the same.

Don't know if this just confuses things. If so, sorry for butting in. (Gotta stop click on New Posts and reading stuff I am not concerned with )

__________________
Graham
85 300D,72 350SL, 98 E320, Outback 2.5

Are you sure it's not the hall effect sensor? I replaced mine yesterday and it fixed my idle surging. Also made the cruise control work. The EPC seems to indicate that all 201s have this sensor, it's on the back of the instrument cluster.

Mine ia an 89, Im not aware of one fanman.

4 100w bulbs WILL put out the same TOTAL lumens as a single 400w or quite close.
Never id an amp check on bulbs so Im not sure what they actually measured, in theory a 400w should draw about 4 amps.

stretch, the weather has me cooling off. Supposed to get ~3" over the next couple of days.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Your 1989 definitely has the speed sensor - the good Dr says so in here =>

The importance of electrickery and your mechanical speedometer (W201/W124 based)

I think the chance is good that you have the blip error testing too. Have you tried to "get codes" before?

http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/350808-i-sell-mercedes-diagnostic-code-readers-blink-readers.html

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Yes and mine is pre Code... or at least other than seat belt buzzers right in front of the battery to the right.

Mine is an 89... your link points out... 90 and later.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

Here's the information from the thread that I'm talking about

So you should have a speedometer cable hall effect sensor

######

I'm not 100% sure about you not being able to pull codes from your car - but I don't want to fall out with you about it!


######


I had another idea =>

How about unplugging the computer and seeing if your idle is steady?

It should be a high idle say about 1500 rpm but if that still hunts or you get surging then you know at least that it isn't to do with any of the CIS junk...

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

NO falling out here, period.

My codes connector, right side front of battery, only gives me seat belt data, nothing else. I tried a code reader and with the help of the mfg proved that my model only provides codes for the seat belt area.

I found the test for the hall effect sensor, where is the critter ? I have no spare.

Which location ECU are you referring to ?

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

I'm not sure how the W124 is but it should be similar to the W201. It's on the back of the speedometer next to the speedo cable input on the W201 instrument cluster, instrument cluster in the W201 is a bit of a pain to deal with. May help to detach the speedo cable from the transmission to get enough length.

__________________
Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.

Scroll down to page 80 in this PDF

http://www.startekinfo.com/StarTek/outside/12264/Program/Engine/103/07.3-0121.pdf

There you will find this picture



This shows the position of the parts for the 1988 and 1989 models.

If you unhook "N3" then you should be able to get the engine to run with a high idle of about 1500 rpm. All of the CIS interference will be removed from the equation. If the engine still surges then I guess you need to be looking at parts of the car that are not CIS related.

Around that area in the PDF (page 80) you can also find the position of the sensor (as w123fanman says) behind the steering wheel as well as the connector position behind the dashboard.

If you can't get codes from "X92" then you need to measure the error codes from the duty cycle via "X11" and then the information given before page 80 in the PDF linked above becomes relevant.

Attached Thumbnails

 

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Great data, Thanks

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."

(More) Deep breaths Bob!

(Don't hyper ventilate)

Other than fire and total vehicular destruction this is the only way...

...let us know how you get on.

I've gotten hold of a decade box and a clamp on multimeter so I can do some measurements on my POS - if I come up with anything interesting (like the speedo-cable error code forget fullness) I'll let you know.

"You're not alone"

We need to set up a victims of CIS support group!

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

I fully support this although so far I haven't had too many issues with the CIS on my car... But I still haven't gotten the engine running as smoothly as I would like to.

__________________
Current: 1975 450SEL, 83 300D, 88 Yugo GVX, 90 300D OM603 swap, 91 F150 4.6 4v swap, 93 190E Sportline LE 3.0L M104 swap, 93 190E Sportline LE Megasquirt, 03 Sprinter, 06 E500 4Matic wagon.

Im convinced that some yugo rejects helped design this POS.
The block hose location of the IAC.
The fuel routing of the Air Flow pot.
The two buried and hidden vacuum connections under the throttle body inlet.
3 quick proofs.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."