please help 1985 mercedes 190e 2.3 no spark
 

Hello..newbie here and im sorry to hijack the post i really need some help.
I have a 1985 mercedes 190e 2.3
I have this vehicle for 3 months
Upon purchase this car had fuel delivery problems
So..i changed:
Fuel pump relay
Filter,pump,accumulator
Rebuilt fuel distributor
New fuel injectors
Car started...yay ran like crap
But started when i stepped on gas pedal car died
It would do this for several times till
Eventually it just cranks
Ok!! Check plugs (old and crusty)
So back to the drawing board.
New wires
New copper plugs
New cap and rotor
New ignition coil
Crank and still no start..
Check for spark and there aint none..
Nothing.
Now im stumped!!
Read about 50 threads here (and thank you all for the great advice) however i cannot seem to locate an exact location of the friggin crank sensor..from what im reading one is in the front under thermostat and also one in rear??
Then i read it might be my icm so im waiting on my shipment of the part.but can someone please be exact and tell me how many crank sensors this car has and exact location i would really appreciate it.and photos would be extra awesome..ive chased my icm wire to coil but its splits up into 5 wires and ive found a location on rear of block with a 3/8 bolt but i dont want to touch something thats not faulty.

CPS is on the bell housing near starter motor near clutch .The front cps is of no use and wont help you find your problem . And if you get in the car turn key to spin engine over do you see any movement from the rev counter . If you can then the cps is ok.By the way do you have an immobiliser on this engine or alarm .This can cut all power to the coil.

After rebuilding the fuel distributor did you adjust the fuel to air ratio ?

This is order of rotation of the firing order .Plug 1 is at aprox 4 o clock. But first did you check the king lead -coil to distributor. wire , i know you say they are new.

I am down to two things CPS is shot and not sending possition for it to fire or the CPS is faulty .Think its the same conclusion as you . I did have this problem ,my trouble was immobiliser ,it just never started up at all after winter standing .Auto electric chap took the immobiliser wires off the coil it started up right away. Can you see any extra wires on the coil ,looking for blue crimp conectors.

Yes i do see many wires on the coil...and thank you for the help as im at my wits end..i just ordered a new icm and a new front tdc crank sensor. Im dead tired from work today but first thing i will remove wire from coil (can you tell me what color wire should i look for?) also yes guage does move when cranking..before it would fire up with gas in throttle now it just cranks no spark at all..i will keep you posted when i check coil in the morning im crossing my fingers and hoping you have helped me solve thos issue!!

You need a diagram of the wire connections to the coil .If its had an immobiliser fitted it will have colour connectors on there .

Look below..

This might help you at some time in the future put this in google search

[url]http://www.autolib.diakom.ru/CAR / MERCEDES BENZ /1983/190E/ WIRING % 20 DIAGRAMS . Do just as its printed out small in place and capital letters in the same place as i have put .In the box put your car to change it .

Thank you i will keep digging and will keep you posted if i get her up and running.

While cranking the engine, what is the output of the CPS?

I dont know ,not for your engine I think if it is your immobiliser or alarm you need an alarm fitter to sort it out .What make is your alarm ?

Any voltage on test , i would say, will rule out faulty cps . Check if the coil is getting amperage to operate You need to peform a drop test between the battery positive cable and the ingnition coil terminal 15 and see if circuit is the cause.

Sorry didnt get back sooner so here we are so far i swapped out the icu with a new one also swapped the coil with a new coil again still no spark
A friend told me to check the distributor ignition pick up so im waiting on that part to come in..im still scratching my head if anyone has a wiring diagram i would really appreciate it till my repair manuals come in or any other ideas would be really appreciated.

How can i locate terminal 15? So i can perform the test you are telling me about and how many volts should i be getting? Also should i test with key in on position? I have been doing all testing with key in on position as i wasnt sure if it gets any power in the off position. How many volts should i be getting at the cps and what are the color codes for the cps because my cps wire on the icm are open someone must have spliced it for previous testing its one thick black wire cover spliced open exposing 4 different wires.ill attach photos

You have a link to electrical diagrams have you not tried it yet ? You can find lots of information on the top of this page .See the spanner and click on Tech info put your car in from the list , lots of information in there .

try this www.autolib.ru/CAR/ MERCEDES-BENZ/1993/190/ SYSTEM%20 WIRING% 20 DIAGRAMS/

Although your '85 ICM is different than my '93, the Crankshaft Position Sensor is the small cable connected on the right side in the attached photo.

For reference, my CPS reads 814 ohms cold, and 900 ohms hot.

While cranking the engine my CPS reads .842 volts ac cold, and .986 volts ac hot.

On another note, you state that you are not getting spark. Are your spark plugs wet with fuel after attempting to start the car?

This as been checked, and no voltage from the coil king wire .

if it moves on cranking cps is fine .

Can you check all fuses if you have not done this .Also the over voltage relay its by the fuel pump relay behind battery at the rear of plastic cover. The ovp will have a fuse or fuses on the top .This will make a lot of problems if its not working.Also your coil should have a yellow type plate on the side if its for your car .A six cylinder coil is no good on your engine. I have all the info on my computer on checking all the electrical items with values .But i am not able to pass it on for some reason.Its startek info .com if some one else can help you it would be a big help.

This is your ovp relay if you remove it and it makes a noise as you shake it that to is shot ,But can be repaired if your careful .

You can rule out the cps if these readings are showing.

If i were you i would join the MERCEDES-190 .CO.UK forum its free i found the workshop manual on there for you its a post from Jack OBrien it reads 102 service manual.,

Please let us know how you get on with the problem in hand .

No reply .

Sorry been swammped with work thos week however i checked the cps and it is getting proper voltage but for now i have ordered a ignition pick up and a new cps just in case.i will post when i get to install them tomorrow.the ovp relay is new and i have double checked it with 2 other ones jist to make sure and it still just cranks..spark plugs are not wet as i swapped those out also.i am getting no spark to spark plugs.

The spark plugs are not wet with gas when you crank the engine checking for spark?

I certainly hope you checked your ICV vacuum hoses, especially the bottom one that connects to the intake boot.

Please let us know what you find out .

Ok good morning was back at it this morning.
I put in a new ignition pick up..still no start but i now have spark so messed with the air fuel mixture and she started right up..its running like crap but its running so now i have to
Adjust the air/fuel mixture correctly..i will continue to keep everyone posted on when i get it correct now off to work i go! Thank you all once again.