ertech

Hi guys got the car 2 years ago and been having this problem even last year.
First of all I have replaced the air filters , fuel filter around 15000 miles ago..
This is the problem:

When the outside temperature is real cold around -20c the car will sometimes just cut as we are comming to a stop or at idle but fires right up .No mater how hot the engine is It happend LAst week when we were low on fuel . I refilled and the problem was still there.
There are no codes . From my research on the board can this be egr related?
Any leads would be great.
Thanks for your help
Erick

alx

there has to be codes. those things throw codes even when nothing is wrong- dirty minded cars they are

search the forum - there were a few folks like you with problems in cold weather.

ertech

I have searched
When the engine stalls suddenly there are no good codes
I have a Mercedes c4 computer
Thanks

alx

interesting.

i would check water separator/ swap fuel filter and take it from there.

ertech

Should I change the sensor and the filter or only the filter?
Thanks

alx

I would say just the filter. If you have fuel starvation issues it will be a dirty filter. They might go from good to bad very quickly. If the sensor is bad you will get a code which you don't have.

I would also try to rev the motor to redline when under load. If you have a dirty filter often you will find that you can't reach redline I the taller gears (4th and higher)

ertech

Thank you

ertech

guys please help me out.
cleared the codes last week.
the car just stalled on my wife on her way to work she want to sell the car

I scaned it tonight and this is what I got

BTW I ordered a new filter today dut did not install it

Thanks for your help

alx

It looks like your cdi control unit is seeing garbage from a whole slew of sensors. And since it is unlikely that they all went bad at the same time i would suspect your ecu being faulty. Also the logged errors suggest your ecu crashed and then recovered.

IMO it is time for a new ecu. I do not know if on the gl a new one needs to be coded to the vehicle. If it does- this needs to be done at the dealer.

This also might happen of you battery is on its way out. I would swap the battery before swapping the cdi control unit. Given yours is a cdi 320 the battery if still the factory one is due anyway.

ertech

Wishfull thinking

Since all this only happens when cold
Can the ecu fault come from

1-dirty egr
2-bad seal at turbo inlet ( found oil there did not change the part yet since it is to cold out)
3-intercooler piping seals?
4-low battery when cold

Thanks for your help

alx

Oil in turbo inlet is normal. They all have some puddle in front of the impeller.

A dirty egr will not throw those codes. At least I have never seen it.

Intercooler seals are irrelevant and will not result in those codes either.

My bet is a battery going bad and if not that- a cdi control unit.

ertech

Thanks for your help
My plan if action will be

1- change filter
2- do a load test on the battery when cold with seat Heater / heater high radio etc..

Erick marciano

ertech

Little update

This morning was real cold . Before I started the car voltage was 11.7 v
As it cranked it went down to 9-10 till started than 13.3

As I was driving around 13.3-13.7
Than when I came to a light if was dropping all the way to 12v than it stalled
Re started and went back up to 13.3
As I rev it goes up to 13.3-13-7

Got to work after a15 min highway trip and as I was existing the volts were going down to 12 and the car almost staled.
When I turned off the car and put the key on engine off and Batt was reading 12.1 v
What do you think
Thanks again
Erick

N_Jay

Bad battery

ertech

That could have caused my stalling?

N_Jay

That I don't know. But given the low voltage immediately after shutting down when the charging voltage is good, I would have to bet the battery is bad. (OK, A slight chance it is bad and/or loose battery cables or grounds also, but rare.)

With computer controlled systems a bad battery can show up as all sorts of weird issues.

Have the battery tested, and replaced if needed then chase the other gremlins.

alx

you should be between 14.3 and 14.7 when running.

your battery is in really bad shape.

ecu is known to crash and restart when battery is bad.

ertech

One maybe stupid question
If the battery is bad but the car is running , it that the reason the alternator
Does not go to 14?
Thanks

N_Jay

Yes, a bad battery can pull the voltage down.

The battery also acts as a filter for the electrical system and if it is bad you will have more spikes and dips which can cause glitches in computers.

ertech

Little update
Changed battery ,fuel and air filter ( air filter was so dirty i changed it 12000 mi ago), reset filter with star. Have to wait form a real cold night to see if it made a difference.
Bty where is the egr ? Got the gasket and oring tonclean it.
Thanks
Erick

ertech

Well today was a real Cold morning everything works perfectly my heated steering wheel now works I wonder if that was related to the weak battery?

lotuni

Sounds promissing at least!

I'll have to keep all this in mind as we regularly get -20 and below in winter here. Thanks for posting an update.