Calling all m103 guru's - Cooling and starting issues - PeachParts Mercedes-Benz Forum

Kofi · #1 12-20-2016, 12:11 AM

So its mid winter here in Toronto, car is acting up again.
1. Still having misfire problems after hot restart.
2. Car stalls in traffic as if its starved for fuel and will have to restart to get going, (wont shift up and and holds at certain rpm then shifts really hard from 2nd to 3rd, this shifting problem happenings rarely)
3. As soon as i installed my winter tires, I'm hearing a howling sound from the right rear side that's on audible from 0-60 km/h then goes away after driving for 10- 15 mins
4. I've changed the whole ignition system minus the coil and ezl, fuel filter is about a year old. I remember the p.o telling me his mechanic changed the fuel pump relay when it wasn't starting, was thinking to start there ?
also how can i do a smoke test to find vacuum leaks

Benz Mondi · #2 12-21-2016, 10:12 PM

Quote:

Originally Posted by Kofi

So its mid winter here in Toronto, car is acting up again.
1. Still having misfire problems after hot restart.
2. Car stalls in traffic as if its starved for fuel and will have to restart to get going, (wont shift up and and holds at certain rpm then shifts really hard from 2nd to 3rd, this shifting problem happenings rarely)
3. As soon as i installed my winter tires, I'm hearing a howling sound from the right rear side that's on audible from 0-60 km/h then goes away after driving for 10- 15 mins
4. I've changed the whole ignition system minus the coil and ezl, fuel filter is about a year old. I remember the p.o telling me his mechanic changed the fuel pump relay when it wasn't starting, was thinking to start there ?
also how can i do a smoke test to find vacuum leaks

Winter time is the #1 time when a worn out EHA starts having problems as it fails to adjust based on feedback from the ECU. I didn't read the whole thread, but if you haven't changed it in a long while, try that. It's a 5 minutes swap with a known "good" one that doesn't leak to eliminate one more variable.

Kofi · #3 12-22-2016, 07:58 PM

I will be purchasing a good used one soon to eliminate that ^(or is there a way to test?)
Around the fuel dist there seems to be a fuel or a mix of oil accumulating around it which is odd.
Last night farting around the car and playing with the throttle linkage while the car was off, I have now developed a high idle in drive and park. It idles around 1000 in drive and 1500-2000 rpm in park and neutral. If i press down on the throttle plate the car dies, its also dirty with the same oily substance around the fuel dist in there(it has done this since i got the car)
I have a you tube video to further help explain.
Also can you guys point me in the ways of doing a smoke test for vacuum leaks?
https://www.youtube.com/watch?v=0x6x5jujn4w

Kofi · #4 12-23-2016, 12:16 AM

so farting around again with it, throttle mircoswwitch ? if i push back on the throttle linkage the revs drop down to about 8-900 which is still high but am I barking up the right track? Also the cars stumbles out if throttle plate is pushed down.
https://www.youtube.com/watch?v=TaweDjWvmbM