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#1
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correct running rpms for 190E
what are the correct running rpm's for 190E? Mine (85, 2.3, 119K) has the following:
idle in park: 1300 idle in drive: 900 at 45 mph 2000 at 55 mph 2500 at 65mph 3000 at 75mph 3500 are these normal? Also, I read somewhere that the rpm drop when shifting from park to drive should not be more than 50 - mine (the drop) is 400! With the A/C on in drive, it goes down another 150 (to 750). could this signify a problem? thanks! Rags |
#2
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Your RPMs when the car is at speed sound perfectly normal (all in 4th gear). Though your idle seems off. This could be caused by a few different factors. If you do a search I'm sure you'll find the possible causes. Good luck!
__________________
2006 E350 w/ 155k miles (Daily Driver) Previous: 1993 300E 3.2L Sedan w/ close to about 300k miles 2003 E500 Brilliant Silver (Had 217k miles when totalled!) 1989 300E with 289,000 miles (had for <1 yr while in HI) 03 CLK 500 cabrio (Mom's) 2006 C230k (Dad's) 1999 S420 (Mom's/Dad's) 2000 C230k Sport sedans 2001 CLK320 Cabrio (Mom's) 1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!) |
#3
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Thanks for your reply David. I did a search and have a couple more questions.
My car also has the following symptoms - hesitation/rough idle on cold engine (none on hot), occasional cold start problem (needs a long 2-3 sec crank). Secondary ignition components are all new. OVP relay is new. New injectors. Could it be the air flow sensor, and/or the fuel pump relay? How do I check whether these two are working properly - what is the testing procedure? thanks, Rags |
#4
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Also, the hesitation/rough idle on cold engine is less is the engine is made rich.
So how should one check and test the airflow sensor and the fuel pump relay? thanks, Rags |
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