Peter Carmichael Posted May 7, 2005 Share Posted May 7, 2005 I've got a bit of a problem. My Mi16 went from working perfectly to complete inability to run on all cylinders below 5k rpm in the course of the last couple of days. It started with a rough idle and got worse and there are now some very specific symptoms. The engine installation is mechanically sound and all fluid levels are fine. Temperatures are fine. The ignition system is in a good state. Don't know about the general health of the fuel system, but suspect its OK. I think everything comes down to sensors and other things electrical. The symptoms: a) engine refuses to run happily at low revs, getting worse as it warms up. b) moving away from standstill requires a clutch burning 5.5krpm. c) with the key in the ignition position, the cooling fan runs constantly (aircon switch is off) d) battery seems to have a healthy charge, but the alternator belt always squeals on startup e) the Bosch ECU (three row) has reported codes 43, 41 and 33 (knock sensor, crank sensor and AFM) f) six months ago I had a misfiring incident that I put down to dodgy fuel (I'm back in England from France for the first time since months and on the first tank of BP Ultimate bought in the UK it started showing these symptoms) (probably a red herring) So, how do I go about debugging this? I am used to working with programmable ECUs where I can monitor all sensor inputs on a laptop. This old tech Bosch stuff is a bit daunting in its opacity. Why is the fan running? Link to comment Share on other sites More sharing options...
Peter Carmichael Posted May 7, 2005 Author Share Posted May 7, 2005 Found the dodgy coolant temp sender in the thermostat housing. Might have fixed a few problems in one go with that one. Excuseme talking to myself. Link to comment Share on other sites More sharing options...
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