I had a simular problem with my 1.9 auto last year, and found it was the ingition coil getting hot then braking down allowed to cool she would then run as normal changed coil everthings fine.
Thanks guys I will be onto the firm mentioned in theprevious post in the morning and as for the coil we changed that early on. I am hoping to get a loan ECU tomorrow but in the meantime can anyone sugest ow the ECU knows which is the compression stroke? Is one of the hall effect pulses longer or is there another signal. There is no crankshaft sensor as far as I can see and even if there was how would it know which of the two TDC's was the compression stroke?
Cheers
Ken
Well-timed silence hath more eloquence than speech.
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
My understanding of the system is limited, but I did read somewhere that the ECU has no idea which stroke it is on, as all injectors fire at the same time?? This is apparently how the basic systems work without crank sensors. The mixture for one cylinders combustion stroke is made up of (3)? separate injector firings. So the injectors are firing on every stroke. I guess the engine just slurps it in.
syncrosimon wrote:My understanding of the system is limited, but I did read somewhere that the ECU has no idea which stroke it is on, as all injectors fire at the same time?? This is apparently how the basic systems work without crank sensors. The mixture for one cylinders combustion stroke is made up of (3)? separate injector firings. So the injectors are firing on every stroke. I guess the engine just slurps it in.
Yes I can see howe that would work. But what about the sparks? I have the same problem understanding how my old Mondeo knows which TDC it is seeing from the sensor on the flywheel. But then again that is running OK (performs a number of symbolic gestures and obsessive functions like touching wood so as to fend off evil me and my big mouth spirits) In that case the injectors fire into the combustion chamber so the slurping process may not beappropriate. I know on some engines you do have wasted sparks but surely not nowadays...
Cheers
Ken
Well-timed silence hath more eloquence than speech.
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
I think that the ignition system is mechanical, with the placement of the distributor, and manual timing set up. So the ecu does not know what the sparks are doing, other than rpm.
My K4M engined Kangoo has a separate coil for each cylinder, which is the best way of controling spark.
