Hi all! I'm back to the alfa world
I've just done some graphs on my recently bought 166 JTD 2.4 20V mJet (185hp).
I know UK didn't had that engine on this wonderful car, it was a pity! However, it came with the 156, so technically is should be nearly the same.
She has lots of power, however, when cold, sometimes the engine struggles to start if I crank it too fast after putting the key on, it's like misfiring, it looks like it's gonna start, but it goes back again to cranking. It's not really cold here, maybe 18ºC, my 156 10V could start perfectly everyday,even on winter, and had bad glowplugs.
When this happens, it'll start on next try, and throw some white or grey smoke(I'm not sure about the colour, but smells like unburnt fuel, not oil )
However, this never happens if I let the key few seconds more after the glowplug lamp has turned off.
I totally discard the glowplugs, it's not cold here! And there are no errors stored on the ECU.
I guess some injectors are on its way out, as there's some black smoke on heavy acceleration.
I'm not really worried, just curious, I can live with it if it doesn't go worse
The engine at idle vibrates a bit, you can feel it on the steering wheel, but ain't shaking, just a feeling like having a powerful engine under the roof.
I made some logs:
Injectors at engine starting, slighly warm (after being 2 hours parked):
With engine hot, I found some strange ups and downs:
And the air and boost readings (street driving)
I'm not sure about the injectors, but the desired/measured MAF and MAP readings are very close, looking good to me.
However that strange spike on the injector 5 looks weird!
How bad are those injectors? Any advice? I can make more log readings if needed.
I hope that giving some hard injector cleaner can cure it a bit, but I'm not an expert on injectors, my previous 156 didn't had this readings and never had to worry about (old 10V model).
I recently cleaned the EGR and MAP sensor, I didn't try again to crank it without waiting a bit, but the power feels the same, also still does the smoke cloud when booting.
Car history has been great, all maintenance done on Alfa Romeo dealer, even the battery is genuine Alfa!