More 20XE probs.
I have a C20XE in my Cav GSi.
I have removed the cat and renewed the lamda sensor and the water temp sensor.
What kind of %co should I expect?
At the moment it is belching out black smoke if it is reved, could this be due to a rich mixture?
What does the screw in the AFM do?
Black smoke is over fueling.
Sure the temp sensor is Ok and properly connected?
I'm as sure as I can be.
I borrowed a mates computer thingy to talk to the ECU and it showed the temp of the water so I assume its working.
wooo petrol city
i would say check the lambda wiring etc again cos thats whats meant to control this sorta stuff
Thats what I thought, once the lamda was replaced it was that that controlled the mixture.
Does anything else help to control the mixture and what about the screw in the side of the MAF.
the afm mixture screw just does idle co
If I haven't connected the lamda correctly would it show as a fault?
should do, depends on the ecu i suppose, one type needs the lambda, the other doesnt
If it was the lambda i don't think the symptoms would be that severe, you can run ok with it completely unplugged.
If your mates computer thingi can read the signal it should cycle between about 0.2v and 0.8-1v at about 1 hz, 0v on over run, and 1v constant on wot.
Coolant temp sensor should give a signal of around 1-1.3v at 80 degrees.
Fuel pressure too high
Funny you mention fuel pressure.
If you disconnect the vacuum pipe on top of the pressure regulator is that the same as WOT of no throttle?
If you disconnect the pipe you richen the mixture at low to mid throttle openings. But again it shouldn't make that big a difference.
But if the fuel pressure is too high, due to a faulty/sticking fpr it will cause mucho over fueling.
Sure it is fuel and not oil as although oil smoke is said to be blue it can sometimes look black.
Last edited by sid16v; 23-10-2002 at 14:06.