Rough idle when Temp is 80c +
10-31-2007 | 01:50 AM
#1
Thread Starter
Newbie
Joined: Oct 2007
Posts: 1
Likes: 0
190e 2.0 modle 1990
Rough idle when Temp is 80c +
Hello every one this is great Forum and i need your help.
i have 190e 2.0 4 cly . modle 1990 , i have Rough Idle when temp is over 80 C .
the Rpm is fluctuating between 700 to 1100 RPM . when A/c is on RPM is stable it is Little High round 1200.
I have changed the Following :
1-distributor
2-EHA
3-spark plugs and its wires
4-Idle speed Value Controller
5water temp sensor ( to injection controller).
6-OVP
one more thing when Auxliry fan is working full ( as result of 100 Degree engine temp ) the RPM drops to 500 .
My car is Automatic.
Please help.
i have 190e 2.0 4 cly . modle 1990 , i have Rough Idle when temp is over 80 C .
the Rpm is fluctuating between 700 to 1100 RPM . when A/c is on RPM is stable it is Little High round 1200.
I have changed the Following :
1-distributor
2-EHA
3-spark plugs and its wires
4-Idle speed Value Controller
5water temp sensor ( to injection controller).
6-OVP
one more thing when Auxliry fan is working full ( as result of 100 Degree engine temp ) the RPM drops to 500 .
My car is Automatic.
Please help.
11-02-2007 | 03:01 AM
#2
Junior Member
Joined: Nov 2007
Posts: 33
Likes: 0
From: Westchester, NY
1989 190E 2.6
Your engine is misfiring. There's a common probem with 190s in which the idle speed-control motor sticks causing a high idle or surging idle. It could also be a vacuum leak, MB wiring harness failure, or your fuel pressure could be flucuating due to your fuel Accumulator, or one of your two Fuel Pumps going bad.
