Right I'm new here so I'll begin with apologising if this is in the wrong place and been covered a million times I have tried to search...

Anyway, I'm having my 1.9 GP sporting remapped, I want to get rid of the EGR as there is a fault on the current one causing the eml to come on. So I thought whilst I'm at it I'll get rid and have it taken out the ecu.

Where can I get a blanking plate? As I have only found them for the 1.3 or is it a case of making one to fit?

Has anyone any experience with rs tuning on these Puntos? (Always been great with my bros clio's/megane)

Thanks in advance,

George

Good decission, EGR is a Diesel engine killer.
One FF member has doubts about the legal aspects about removing the EGR, but I don't at all.
Lot's of blanking plates on Ebay to be found.
or here: www.jtd-performance.com click on the UK flag.

I have made an electrical mod that fools the ECU into thinking the EGR is still working when in fact it is disconnected and stays closed, and I have fitted it to my Merc and to my Panda 1.3 Multi with complete success.

It may be possible to delete the EGR function on yours without going to the bother of fitting a blanking plate, using this mod. I'm not the originator of this idea, but my Merc is now at over 150k miles and running perfectly with it fitted. Easy soldering job and very cheap to make. I'm getting a few photos together and will post them on here if anyone is interested.

unless yours is stuck open there is no need to blank it, if its deleted it will stay shut

Even when electronicaly ( ECU) shut, the EGR will stay open for about 5-10%, so it is still necessary to blank it, best with two blanking plates provided by f.i. JTD-Performance.

mines not blanked, i gave my plate away to a stilo member who didnt even come back on the forum to day thankyou

it is deleted though

Well, if you want the EGR to be completely shut of, you have to blank it, I'm afraid...
I did this to my Alfa GT jtd last year with good results.
A chiptuner deleted the EGR from the ECU, and I used two blanking plates to be sure the EGR isn't passing contaminated gases to the inlet anymore.
No more smoking during accelerating, the rear of the car stays clean much longer, as does the oil...
And most of all, it gives me peace of mind...!!!
( I removed the two catalysts as well....)

I'm no expert, but - there are various types of EGR valve out there. Some rely on a spring to hold the diaphram down and keep the valve shut, others a bunch of solenoids to act as the 'open sesame' signal, some use a pwm signal to do a similar job and some use a stepper motor with gears to physically regulate the valve open or shut.

So some might leak a little, especially if the spring is weak, and on others a leak, even with high manifold pressure, will be extremely rare.

Blanking with holes in the plate to avoid a Mil light coming on will cause an increase in airflow speed through the holes compared to the flow speed in the unrestricted pipe. This means that, if your holes are, say, 10% of the original area, you will actually end up with a deal more than 10% of the exhaust gases still flowing through the pipe. Better than nothing, but not ideal.

Best way is as posted above - stop the flow entirely.

There are basicaly only two EGR versions used by Fiat for the JTD engines, 8V and 16V, and they operate almost the same.
They won't leak or something, but will stay open a little, even after deleting them from the ECU, that's just the way they are designed..
So if you realy want to close them, there's no other option than blanking...

Peter Pick-Up said:

They won't leak or something, but will stay open a little, even after deleting them from the ECU, that's just the way they are designed.....

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That's surprising, and I didn't know that.
At idle, a leak from the EGR really messes things up - causes rough running and throws faults - a bit like drilling a hole in the inlet manifold or a faulty gasket.
If a leak is designed in, how is this overcome?
And what is the purpose of deliberately designing an EGR to leak?
Do you have any more information on this?
Thanks.

They don't leak.

Yep....post they photos of the MAF/EGR shunt please!

Peter Pick-Up said:

They don't leak.

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Wrong word - apologies.
I meant, as you said, 'stay open a little'.
Same question.

Designed so by Fiat, don't know why.
Maybe to keep the inside more or less clean, or get it moving/functioning or.....??

:shrug:

Hi I've got a grande punto does anyone know what diameter is the external size of the exhaust pipe as I need an extension piece to fit my exhaust

Sweetsixteen said:

At idle, a leak from the EGR really messes things up - causes rough running and throws faults - a bit like drilling a hole in the inlet manifold or a faulty gasket.
If a leak is designed in, how is this overcome?

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No worries. Diesel engines idle perfectly well with EGR and since they are designed to do so, this wil not cause any faults.

AGH1965 said:

No worries. Diesel engines idle perfectly well with EGR and since they are designed to do so, this wil not cause any faults.

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Yep - you're right - they do, but only when the egr valve is working as it should with no leaks. And that's the problem. They are a troublesome addition to a modern diesel engine, forced on us by EU regulations.

An EGR valve should be completely closed when an engine is idling and also when an engine is cold. The engine will then idle as it should. The valve should only open at speeds above idle, depending on operating conditions. If it is open or leaking at other times it will trigger fault codes. If you see codes beginning with P04, these are probably caused by a malfunctioning egr valve.

A faulty egr that leaks or is stuck open not only slows down the turbo, giving loss of power, it can cause the Maf to give strange readings which are then interpreted by the ECU as mixture anomalies, with limp mode triggered as a result.

Symptoms of a faulty egr? Misfiring (look for codes beginning with P03), hard starting, surging, poor fuel economy, rough idle, and premature detonation (pinking). The combustion temperature will also be higher, which in the long run could cause exhaust valve damage.

EGR valves were originally introduced to minimise N0x in the exhaust, but there are now better ways to do this job. They are troublesome because they clog up and jam, and because they also coat sections of the inlet tract with tarry, sooty deposits. Recycling exhaust products through the combustion chambers also leads to premature bore and valve wear.

You can probably tell that I don't like egr technology! That's why I've deleted mine electronically.

Sweetsixteen said:

You can probably tell that I don't like egr technology! That's why I've deleted mine electronically.

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I did the same to my 2004 Alfa GT jtd, but to be absolutley sure, I used two blanking plates as well...so my EGR is 100% shut.

Sweetsixteen said:

An EGR valve should be completely closed when an engine is idling and also when an engine is cold.

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That is your assumption. Apparently FIAT's engineers thought differently.

Sweetsixteen said:

You can probably tell that I don't like egr technology! That's why I've deleted mine electronically.

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I wouldn't have bought a car with a diesel engine if that was my opinion.

AGH1965 said:

That is your assumption. Apparently FIAT's engineers thought differently.

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Fiat knows a great deal more about their own engines than I do!
If they have built-in a bypass for the egr when it is closed, then the rest of the engine has obviously been designed to suit.

The principles of my post above still apply, in that if the egr malfunctions, the faults described will show themselves with this engine as with any other. Unfortunately, egr valves are an additional source of trouble with a modern diesel engine.

AGH1965 said:

I wouldn't have bought a car with a diesel engine if that was my opinion.

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Your opinion is of course just as valid as mine. Cheers!