Well after having all the inlet manifold, EGR and swirl actuator replaced the other day, I have now started my blanking the EGR project.
I have initialy blanked it off all together by fitting a metal plate between the inlet side of the EGR and the exhaust take off pipe, it was a bit of a pig to get in as the take of pipe is rigid but a bit of brute force and ignorance and some easy gasket and all is fitted and sealed.
So what now!, well MIL on showing 0400 EGR gas flow problem!, No suprise there, but how does the car drive.
Very well, the turbo definately spools up quicker but I only took it for a short drive before trying the next step.
From the forums, different people have varying levels of success with the FIAT restrictor plates, some like me have no problems restricting the flow heavily, yet others get a fault with the slightest restriction, yet engines etc are identical, so what can be different?
Possibly the ECU has learnt differently!.
According to literature from Pierburg, the ECU learns the values from sensors including MAF when first started from fresh, so I have disconnected the battery and will leave it for at least half an hour before reconnecting, the ECU should then learn what the air flows are like with the EGR open and shut and I'm hoping may set these as basepoints to detect out of limits and throw of the 0400 fault code.
If it throws up the fault, then there is a bit more inteligence to the system rather than a simple compare, but I have to start somewhere and this is the easiest and cheapest first step!.
If it fails, I have to start making things which might take a while.
One big plus point so far is that the car runs perfectly, no longer sucks soot into the intake, turbo spools faster, less flat spot, better low range performance...
Downside, a small yellow light!.
At the moment, this is just a pending code so it is not putting the car into limp home mode and I don't know if it will, but just to be on the safe side, I'll be taking my fault code reader / reseter with me and will leave it plugged in whilst driving to and from work today.
Will let you know how I get on.
Anyhow, it's half an hour, I'll leave it a bit longer then reconnect in a bit.