on January 19, 2013, 8:34 pm, in reply to "Re: Peugeot Expert 3 When driven hard engine dies"
The vacuum gauge (wps 500) was put in line with the fuel supply pipe. You have to blank the pipe off before the gauge or you will not get a reading on the gauge. When I blanked off the supply line my vacuum rose to 500 mbars from 60 mbars unblanked.
When I checked the IMV duty cycle I also current clamped the IMV valve.If the valve was sticking I should be able to see it in the current trace. The IMV maxes out at 30% on time according to Peugeot.
I am sure the injector leak is possible at higher revs but impossible to test unfortunately (as far as I know). This engine is limited to 2500 RPM while stationary at full throttle. I did test the leak back rates at 2500 RPM. All were equal.
One thing I have not mentioned is that the leak back from the pump looks excessive. That is a personal opinion. I have never looked at leak back from CP3 before. Would this account for my low supply vacuum? It would account for loss of high pressure under load.
I hope this clears it up a bit. I am happy to answer any questions you have so dont be shy.
Thanks.
Fiachra.
