apartransit wrote:Not sure if helps, but try to check pressure demanded from pump to injectors. This could help if you se huge pressure difference between pressure provided and pressure demanded,pressure regulator is faulty.
njoshea wrote:Some musings while I wait for the modified ELM327 to turn up...
The improved low gear/high RPM performance with EGR blanking is telling me something...
Turbo is 'new' (reconditioned), EGR is new, cylinder rings were replaced a couple of years ago, injectors were called good at the same time, silencers & catalytic converter are clear. Is there any other mechanical item Ive overlooked?
Assuming the 'hardware' is good, then I guess it must be sensors...looking forward to the code reader turning up!
njoshea wrote:Hang on a moment...whats this??
So, I go for another short drive to verify the fixed thermostat results in correct Engine Cylinder Temperature (ECT) - it gets to ~90degrees - tick, looks good.
I also logged EGR and Turbocharger Vane vacuum solenoids as well, and, bugger me, I get this:
Its flat zero throughout the test drive - this tells me the EGR valve isn't being commanded (via vacuum) to do anything! Does that sound right to forum readers??
FORScan describes this EGR variable as:
Exhaust Gas Recirculation Valve Duty Cycle
This parameter represents the variable duty cycle to the normally closed EGR vacuum solenoid. This solenoid varies the vacuum applied to the EGR valve.
So, I ask the forum - if its reading zero does this mean the EGR valve is always open (letting exhaust gases in to the inlet manifold) or always closed?
Note - the EGR valve itself is new. A few weeks ago I had it blanked for a few days to see if running performance improved, and it did.
njoshea wrote:Sure I can blank the EGR, but I'd rather not.
I'll be checking the EGR solenoid functionality next, any other suggestions out there would be appreciated!
marc1234567 wrote:njoshea wrote:Sure I can blank the EGR, but I'd rather not.
I'll be checking the EGR solenoid functionality next, any other suggestions out there would be appreciated!
it is fair enough wanting to get to the bottom of it all but what do you think will be the downside to blanking the egr? I think the default for the egr is closed. This is based on me taking one off and looking and seeing g it was closed.
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