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#1
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300E idles at 500rpm!! IS IT NORMAL???
Hello Board,
My 300E has been doing this for a while. The idle speed is at a dismal 500RPM!!!!. I at first thought that it was normal, my car sounds quiet,but it feels very underpowered during acceleration. I have cleaned out the idle control valve. What could be causing this?? I have replaced: Cap and rotor Plugs and wires Air filter Cleaned idle control valve All vacuum lines Fuel filter Injector seals What could it be?? ECU?? O2 sensor?? Fuel injectors?? HELP!!!
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1987 mercedes 300E 1995 e320 conversion(hated the 300e grill) HID/Xenon (D2S) Keyless Entry Monochromatic Paint (Custom Blue) Smoked Tails Flat Badged (front) Debadged (rear) custom "carbon fiber" console 18 inch HP EVO rims Sold! Now I drive a Monte Carlo SS http://memimage.cardomain.net/member.../352975_67.jpg http://memimage.cardomain.net/member.../748335_24.jpg |
#2
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500 is low but if it idles smoothly and will not stall
it has to be ok. mine idles at 650-700 range. if you haven't done so, clean throttle linkages, pour injector cleaner - techron, and drive long and hard.
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joel Prayers bring forth enlightenment. |
#3
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Well this is an "open" question, but what could be the cause of my car's dismal 500rpm idle.
My previous 1989 300E idled at a steady 800rpm, but it also had issues.It's gone now. What could cause my 1987 to have this low idle?? Would a worn potentiometer cause this??
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1987 mercedes 300E 1995 e320 conversion(hated the 300e grill) HID/Xenon (D2S) Keyless Entry Monochromatic Paint (Custom Blue) Smoked Tails Flat Badged (front) Debadged (rear) custom "carbon fiber" console 18 inch HP EVO rims Sold! Now I drive a Monte Carlo SS http://memimage.cardomain.net/member.../352975_67.jpg http://memimage.cardomain.net/member.../748335_24.jpg |
#4
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my 86 now idles at 600, after putting a new o2 sensor, before it was 700, same as you new plugs wires ete. ran bad at first so I disconnected the battery for a little bit it smoothed out I will know more next tank of gas
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#5
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Just a suggestion - run a search using 'CIS' (the fuel injection system you have, I think), 'low idle' and 'underpowered' and see if it flags anything. The search function is quite good on this site.
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dtf 1994 E320 Wagon (Died @ 308,669 miles) 1995 E300 Diesel (228,000) 1999 E300 Turbodiesel ( died @ 255,000) 2006 Toyota Tundra SR5 AC 4X4 (115,000 miles) rusted frame - sold to chop shop 2011 Audi A4 Avant (165,000 miles) Seized engine - donated to Salvation Army BMW 330 xi 6 speed manual (175,034 miles) 2014 E350 4Matic Wagon 128,000 miles 2018 Dodge Ram 21,000 miles |
#6
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If I remember correctly, 650 or so out of gear, 500 in gear is the correct speed.
Peter
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1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs! |
#7
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i believe the fluctation should only be 500rpm max!!
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joel Prayers bring forth enlightenment. |
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