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Rough restart after driving
I know there are many post about the jetronic engine control system but i haven't been able to find anything that could help me with my experience which is as follows;
1. The car, 350sl/117 engine, cold starts right up with no problems and idles about 900 rpm until the engine is warmed up . 2. The idle settles in at about 700 rpm when warm before driving off after a cold engine start up. I can't seem to get it any higher. 3. After a drive to a destination and the car has sat for some time, about 20 min. for example, upon restarting the car, it does not want to idle. I have to feather the pedal and or start to accelerate immediately to keep the car running. If I take my foot off the throttle the idle will drop to around 600 rpms or lower. Does this problem sound farmiliar to anyone? Coolant temp sensor maybe?
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72 350SL #69 73 450SL Parts Car? 78 450sl Parts Car 79 450SLC - Sold 1985 280sl 87 190E 2.6 - Donated 90 300E-Junked 97 E420 Last edited by knarf; 02-18-2002 at 07:16 PM. |
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I'm not up on that model. What fuel system does it have? Is that the old CIS mechanical injection system? If so, on a VW I would look for a bad warm up presure regulator or aging ignition components. Does adjusting the idle screw on throtle body have any effect at all?
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do you have similiar problems with the '79 slc? The reason I ask is that I am experiencing similiar conditions when the car has been driven heavily and then gets shut down for 5 minutes or so, and then I restart. It idles very low and dies if I don't give it some acceleration.
The '79 and '72 have very different fuel injection systems. My idle when cold is around 1200 and settles down to 750 when warm. This weekend I turned the idle adjustment screw 1/2 turn counter-clockwise. That seems to have helped.
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Mark Herzig 1995 E300D 153K 1985 300D 142K (sold) 1979 450SL 122 miles (sold) 1992 500E 127K (sold) 1987 300SDL 132K (sold) 1986 300E 161K (sold) |
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