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#1
10-11-2003, 10:37 PM
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Does the coolant sensor affect idle and hesitation???
Hello Board.
There are 3 temp sensors on my m103 engine. 1 controls the aux fan 1 shows the coolant temp the other sensor I am unsure of (I think EZL, CIS-E). The problem is that my car will randomly hesitate. I can drive for 30 minutes and then my car will randomly hesitate when I pull from a light. This lasts for a brief second, but it is very noticeable. It is very bad with my A/C on, I had to unplug my 02 sensor to tone down the ferocious hesitation. I read somewhere that that third sensor(I think EZL, CIS-E) can cause these symptoms. Is this true???
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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 
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#2
10-16-2003, 10:02 PM
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bump
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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
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#3
10-17-2003, 12:10 AM
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Serious hesitation is usually an indication of lean running. Yes, the temp sensor could have an effect, but what cured the TE from the "I have it almost floored and it's only just above idle for a second or so" was fixing all the vac leaks. Mixture was then running at 78% duty cycle, everything is fine now that I've got it set correctly.
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!
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#5
10-30-2003, 12:42 AM
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Hell Board,
I bought a new CIS temp sensor today, installed it and my car still idles rough when the temp passes 85 C. Looks like my old temp sensor was working perfectly fine. Anyone have a clue why my car does this? My car needs new stem seals, could worn stem seals lead to rough idle? Anyone interested in buying my old temp sensor for a really cheap price? PM me if interested.
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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
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#6
10-30-2003, 01:24 AM
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No i wouldn't think bad stem seals could cause rough idling. And if they did, oil-smoke from the exhaust would be VERY obvious.
I replaced the coolant temp sensor in mine last year. -Got rid of rough idling and rough running. -Later i had to replace the entire injection system, but that's another story.. Freestyler
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Never criticize someone until you've walked a mile in his shoes. That way, when you do, you're a mile away -and you have his shoes! '86 300E optically converted to '95 E300 (Sold) -Blauschwarz on silver -Black leather -17" AMG & 15" AMG for winter
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#7
10-30-2003, 03:17 AM
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Looks like its time to take that sucker to the dealer(Gulp!).
I've spent a lot of $$$$ to try and solve this problem, and it still hesitates and misses. I'm guessing it must me electrical
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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
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