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Old 08-30-2014, 08:09 AM
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lsmalley lsmalley is online now
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Join Date: Oct 2006
Location: California
Posts: 2,168
Well the slow acceleration problem has been resolved in exchange for an extremely high idle. I swapped out the TPS and while I had it off I shot a bit of carb cleaner into the fuel injector ports (not the fuel injectors) to see if there was something causing valves to stick, then I shot a bit of Lucas fuel injector cleaner into the ports for some lubrication. When I buttoned everthing back up I cranked the engine and the idle was extremely high so I tampered with the fuel-air mixture by turning it clockwise and the idle got higher, so I backed off and turned it ccw and it lowered. However, I don't have a duty cycle reader I was using my digital voltometer to check the mixture. I know my fuel-air mixture toggles between 5.5 - 6.1 volts (per the BOSCH KE3-JETRONIC MIXTURE ADJUSTMENT) this method is exceptable to gauge the duty cycle. Anyways, I turned it ccw until I was stopped at .11 volts, but when I shut the car off and tried to restart it it would not turnover. I then turned it cw again to bring the volts back up to where I was at before and it fired up with a really high idle again so I pulled the plug on the IACV and that brought the idle down some, then I turned it ccw again and got it to idle at 1100 rpm. What I did notice is that if I put it back the way it was and reconnect the iacv, if I similate a vacuum leak the idle drops down to normal depending on how much of a leak I create. Anyone care to shed some light on this?
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1990 190E 3.0L
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