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Hi every body,
After fixing the bouncing idling in my 940 GLE 16 valves, I tried to reduce the idling to roughly 700 or 750rpm from the current idling of 900 to 1000 rpm. First I unbuckle the piece of rod that holds the throttle arm and the throttle spool. Then loosened the lock nut and unscrewed the srew while the engine is idling. Intermitently I rev the engine to check the new idling rate. At one point I noticed that I had unscrewed all the way that to the point that the screw was about to come off!!! Yet the idling refused to go below about 900 rpm. I suppose its the by-pass air controlled by the Idle Air Control valve/motor preventing the car engine from stalling.
Then I screwed back the screw until it was about to touch the throttle arm that supposed to rest on the screw and tightened the lock nut. I then loosened the screw on the throttle body switch. I followed the instructions in the FAQ section. First the switch turn away from the connecting cable until it comes to stop then etc. etc. ect. all that but still of no luck.
Thirdly I adjusted the adjustment screw in the Air Flow Meter while the engine is idling. A few turnings to the left and a few turning to the right did not produce any result.
Fourthly, I sprayed the carb clearner into the throttle body with the flap wide open and then remove the Idling Air Control valve/motor and sprayed the carb cleaner into the hose holes. I did this a few times and used the screw driver to wriggle the flap in the IAC. Then re-connect them back where they belong. I started the car and the result was that the idling was still at 900 rpm. However if the air cond is switched ON the idling drops to about 750 rpm. I also looked at the FAQ section on the OBD system and tried to read the codes but checked out OK. Under test mode 1, I get a reading of 1-1-1 with the DLC in socket in #2 (I tried this three times) and with DLC in socket #6 I get 1-1-1 as well (I did tried three times). I also tried test mode 3. Everything ckecked out OK except that I get a reading of 3-3-2 when the throttle is in full load (instead of 3-3-3). Then I moved the throttle is moved slightly from its resting position and got 3-3-2.
I recently travelled outstation (prior to all the above mentioned)and I filled up 52 litres of petrol(about 11.38 gallons)and the distance I got was about 480KM (about 298 miles) which is 26.18 miles per gallons at constant speed of about 80KM/h to 90KM/h. If its urban driving, I get about 50KM (about 31.05 miles) for about for 8.33 litres of petrol(about 1.82 gallons) which comes about 17.06 miles per gallon.
Can anybody out there shed some light on these please.
Thank you.
velan@hotmail.com
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