E.G.R. Disconnect.

Originally Posted by davidd

quick update on removing the air flow valve and replacing it with an under size one. it goes like a f%$#*&g shower of s&%t. touch the pedal in low gears and it just spins the tacho real fast. awesome acceleration.
when i switched off it was a very quick shut down with a slight shudder, nothing dramatic. don't know how this will affect the engine, but it seems to me it is pretty much a cheap substitute for a chip. will have to get the thing checked later to see what the air temps and gas flows are before i can recommend it or not. but sure gives it a boot.

What Diameter airflow valve disk do you make

I read some people take it out altogether but i think leaving something there do limit air and stop shut down shudder would be a good idea. The air valve is still going to fully open when you put the foot down anyhow.

I went to a dealer today as i needed their StarScan tool to reset an ABS fault and while he had it plugged in i asked out of interest about switching the EGR OFF.
Their Tool wont allow them to do it maybe only a Bosch diagnostic tool will do it?
They said best way is to un-bolt EGR and make a blanking plate then bolt it back on, reckoned its better than plugging Vacuum Hose and wont cause ECU Faults codes. Both ways seem the same to me only their way ensures its blocked 100% as your not relying on the EGR Valve itself to provide a good seal.

[davidd]

thanks for that shortstuff. i wonder if we'll hear from EugeJK again on this, after his last post about switching it off. after that post, i rang my local bloke and he said he had never heard of that function, and his bosch tool had all the latest updates for chrysler, (there are bits of hardware and software that can be added to equipment from time to time to update as technology changes). said he would put out an industry enquiry just in case but never got back to me (which answers the query). he said perhaps it is a function dealers may have on their starscan. have sent eugejk a p.m to try and get the phone number of the specialist he went to but no reply. now you have been told by a dealer they don't have a switch off function on the starscan.. hhmmmm euge what gives here mate. mate of mine has an autoenginuity diagnostic tool. there is a section of the software that allows you to go to any engine control unit, or module or body or electrical function and cycle it on and off to test it. but it simply test cycles it, like air flow valve, switch on and it switches on for a few seconds then off. select horn and the horn blows for a few seconds and so on. allows you to test all vehicle functions in turn , but cannot turn anything off permanently. as far as i know the starscan is the same and so is bosch tool. would like to hear from euge with the name and phone number of his workshop so i can give it to my workshop to contact them.

[davidd]

and yes blocking off the egr with a plate is a commen way of doing it. mate i haven't measured the plate it was made up for me as a test thing. is probably a bout 2mm smaller radius then the full one. has the effect of allowing more air in at closed valve point. as the valve opens the effect lessens. it mainly gives a much stronger low bottom end , as in under 1200rpm. there has been a problem with the air flow alves in some models of jeep, and this could be a way of saving hundreds of bucks buying a new one. it gives bottom end boot. but it does give a bit of death shudder. with no air flow valve it's like turning off an early model truck where you see the whole truck shake as it shuts down, this just lessens the effect. i've just been trying it as i have had alow power problem and looking for solutions. voltages have been checked, no dash light. no codes etc. just trying things. next up may have to get fuel system and injectors checked

[davidd]

just as a matter of interest, i think these things have a pretty intelligent ecu. certainly plugging the egr has had a positive effect. then after the air flow valve change came the huge power boost, which was acompanied by a harder cold start in the morning and a slight shudder on shut down after a few days i now find start is normal, huge power boost has dropped to mild boost and shut down shudder varies but never long and violent. the ecu must really learn and adapt to changes.

I wonder sometimes of the info given out here? I know the dealer wasn't bullshitting me cos i was looking over his shoulder, he even got someone else to have a look and there just was no function to turn EGR off, said it was because its an emission thing and the software wont allow it. (i even offered him a cashy to do it ha ha)

Also asked of one other thing as someone else on Ausjeep said he had the ESP setting reduced for Suspension lift (and this guy also removed his rear swaybar)

Again no setting to do that found! now this is the 3rd Dealer ive asked about that one so i'll give up on that now, ESP cannot be changed/settings reduced etc as far as dealers are concerned and i now believe that to be the case.

[Yom]

Originally Posted by ShortStuff

I wonder sometimes of the info given out here? I know the dealer wasn't bullshitting me cos i was looking over his shoulder, he even got someone else to have a look and there just was no function to turn EGR off, said it was because its an emission thing and the software wont allow it. (i even offered him a cashy to do it ha ha)

Also asked of one other thing as someone else on Ausjeep said he had the ESP setting reduced for Suspension lift (and this guy also removed his rear swaybar)

Again no setting to do that found! now this is the 3rd Dealer ive asked about that one so i'll give up on that now, ESP cannot be changed/settings reduced etc as far as dealers are concerned and i now believe that to be the case.

We must be the bananas in pajamas (without the homosexuality) as we both seem to be thinking the same thing

[davidd]

the esp off switch on the dash, simply cuts part of the programme off and desensitises what's left. it may be that some dealers have somewhere disconnected somethins so it stays in esp off mode maybe. but yeah it seems the "egr off" myth has been busted. and also the "reduced esp" setting. sometimes a dealer will no doubt feed an owner a bit of bullshit to get rid of him if he being difficult. i think this is where some of this stuff comes from. so we have to blank off the egr and leave it at that still, and let the ecu adapt to the change. that one works. the cutdown airflow valve is questionable.