johnson550 said:

Ive just had a look and I cant see anything that could be a DPFE

Click to expand...

I've been told there are other ways to monitor EGR performance but DPFE seems to be the most common. I'm still trying to find out exactly how, I'll let you know if/when I do.


Edit.
This is a reply I had from a top tuning guy.

A certain amount of airflow through the maf is expected at a certain speed and load, it then takes egr into the calculation and then you have positive and negative deviations being calculated with factors for temperatures, pressures etc. There is also a lot of failure triggers for the dtc handling going on.
The whole control function resembles that of the turbo control, and in each newer ecu family it gets more complicated.

A lot of cars use this method as he remaps ECU's. All tuned diesels have Blanked EGR, Decat and a remap, he has to rewrite the MAPs that control EGR monitoring to allow them to be blanked off or completely removed.

The restrictor plate(Part number - 71751469, bulletin attached below)issued by FIAT had to take into consideration that some of the vehicles the plate would be installed on would have this sort of EGR monitoring system, so the holes in the plate where made as small as possible without restricting the EGR flow so much that it resulted in an error being detected and the EML showing on the dash.

Thought Id update whats happened so far, car was really sluggish upto 2000revs so I put a blank plate in to see what happened and the car was champion to drive but gave me EML light so I took EGR off and cleaned it. Put EGR back on with original gasket and it was no better so on went the blank plate for a few days till I had a think and a look to see what else could be involved. I took what I think is the MAP sensor off( its connected to the same chamber as the EGR ) and what a mess, it was in covered in tarry looking stuff so gave it good clean with carb cleaner and a little brush. Put that back and a test run and what a helluva difference although still not as good upto 2000 revs as it used to be. I hooked upto FES and tried actuator test on EGR and got FAILED TO EXECUTE it also had conditions not right for test, so dont know what thats all about. Going to put the blank plate back in for now although I might get them gaskets with the holes in give them a try see if it does any good.

johnson550 said:

I hooked upto FES and tried actuator test on EGR and got FAILED TO EXECUTE it also had conditions not right for test, so dont know what thats all about.

Click to expand...

"conditions not right for test" means you had the engine running, it wont perform the test while the engine is runing.

Turn the ignition on but don't start the engine, then run the test.

i think i have found the problem with mine. The eml is actually an enjoyment management light. When i boot my car and start having fun the light comes on and the car slows.

Not sure what the cure is. Maybe a bit of tape over the light

Shadeyman said:

"conditions not right for test" means you had the engine running, it wont perform the test while the engine is runing.

Turn the ignition on but don't start the engine, then run the test.

Click to expand...

I cant believe I did that I must have had a brainstorm or somit considering the amount of times Ive used FES. Would you believe I was the first he contacted on the Marea section about FES
13-11-2009 #5
yani
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Re: Clear Fault Codes
Hi,

You can also check this free software - http:// fiatecuscan.net
It can read/clear error codes, read data, draw graphs, test actuators, etc.
johnson550 thanked for this post
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Just phoned local stealers about the restricter plate and gaskets for the 150Mjet in Shadys post -£18 odd plus vat for the plate and £4 odd plus vat for the gaskets Ive no doubt ebay will be flooded with them shortly.

quick update on the modified swirl gasket and newer version of the 16v egr valve.annual clean out time in between showers
heres as found without doubt the newer valve has been better designed around the valve stem area as no soot at all was found in the cavity between valve and solenoid.


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search this part number to be sure of getting the newer modified version 55215031 for 16v 150 or cdti 150 as mine was from a vauxhall place on ebay(sorry cant remember who but less than £100)
this was what i found when i stripped my original valve