Vauxhall Combo 1.3 CDTi Z13DT 2004 - Does not rev and blue smoke #
Posted by Carl Ford on March 31, 2011, 8:10 pm
Year of Manufacture *: 2004 Engine Size and Code *: 1.3cdti z13dt ( Optional ) ECU Type: Bosch ( Optional ) Scanner Used: Vaux com ( Optional) Fault Codes: Nonr
Hi all could do with a little bit of advice this car has come to me from a friends garage lack of power and blue smoke he has fitted an egr valve but still no better I scoped afm and signal was very low only peaking at approx 2.8volts by unplugging the sensor it seems to rev and drive better still a bit of blue smoke but goes ok so I decided to replace maf but still no better I have been hacking my brain to try and work out what could affect air flow, swirl flaps not fitted to this vehicle and can't see any sort of intake flap, mechanically I feel the engine is ok as unplugging maf makes it ok I'm going to make sure exhaust isn't partially blocked tommorow and I have also smoked inlet and no leaks found, turbo is a mechanical type and boost to 8 psi with maf plugged in and 10psi with it unplugged map sensor and number3 injector look new but neither me nor my pals garage have changed them so maybe it's been somewhere we don't no about. Any help appreciated TIA Carl p.s will post afm waveform tommorow when I get to work
Hi Carl, I have had one with a very similar fault which was previously an airport security vehicle wih 40K on the clock but had probably been run 24/7 for 4 years. Main dealer fitted a turbo which made no difference and I fitted a MAF as this one also ran better unplugged. I took off the inlet manifold because it was pretty choked up and cleaned EGR etc. I was convinced it was a breathing fault but never got round to cleaning the exhaust manifold as the customer felt that it had improved enough for him to drive it. He has now had it 3 years and drives it for "normal" journeys with regular Forte treatment and although it's no powerhouse it is acceptable. HTH's, Bryan.
Thanks for your reply Bryan I have removed inlet manifold and cleaned it out as it was a bit coked up, have taken loads of waveforms from this vehicle all of which seem very noisy not sure if this is an issue or not will have another go at posting them Monday have since also checked compressions and they are good, one problem I do seem to have is with the pipe from the turbo to the intercooler removed and scoping afm I expected to see the waveform go off the scale but it didn't it just peaked at 3.5v so I am now thinking maybe on this engine the afm reads lower than the vehicles I'm used to seeing on a day to day basis. I have had a flick through lots of diesel issues on this forum tonight and one very basic check I had ruled out due to the vehicle revving better with afm unplugged is the timing but thinking about it now this may be a big mistake and maybe I should of checked this as one of my first checks Regards Carl