yes mate if you blank off the vacuum pipe and leave the EGR as is and its stuck open it can make it run worse , I have done some research on the net on this and found on diesel engines the EGR valve is no good anyway , I think I may still have a slight bit of hold back on mine though from a stand still , il let you know later

 

ive got a Vauxhall vivaro which ive blocked off the egr valve haven't had any issues and had no issues with emissions but its a different engine

 

different in what way mate , better fuel , and power etc

 

I think I have a tiny bit better mpg but I have noticed a difference when you suddenly put your foot down you don't get any smoke which must mean the pipes are staying cleaner but I haven't had the ecu remapped on vivaro don't really know if it will make much more diffrence

 

I've never heard of an EGR only remap, the benefits only appear with a full remap which should give about 15%+ BHP on a 2.8CRD. the increased horsepower, torque, fuel economy and smoothing of the power delivery is the full remap. The blanking without a remap will provide +MPG and a improvement in smoother torque and a reduction or elimination of black smoke, but the full benefits of a full remap are a totally different outcome and cost. Anyone not offering a 30 day money back and a lifetime warranty on the software change on a full remap should never be used.

I as I said earlier have not yet done mine because it's low mileage, goes like $hit off a stick, gives me 32.9MPG, and has no black smoke. If I was to seriously consider it I'd only go with a full remap and cast iron guarantees on the software, and would need to have someone in the trade independent of the chippers who knows personally a remapped 2005 2.8 with my particular EURO edition of Chrysler software.

 

no mate what I mean is , if your EGR is electronic , you have to remap the ECU to tell it there is no longer an EGR there

 

I know a 'mapper' if I'm going past his 20 I'll pop in and ask. I'm not even sure it would need a remap, they're always clogging up and no one for example on this forum ever complains about EGR codes .. .. just about pinging / loss of power / black smoke etc as a result of being glogged with black stuff.

 

i was told if its electronic you will need a remap because you will get a light pop up on the dashboard , and I imagine that's an MOT failure

 

The earth will not end a few milliseconds earlier than it otherwise would, there are some places in the world that get smog but not in the UK, not even London. My vacuum & electrical ERG blanked engines ran on sweet clean air and my engines were cleaner, engine oil did not get dirty as quickly, the manifold and head will suffer less with oily carbon. Flat spots between 1500 and 1800RPM, where the valve opens and $hites megga particulates into the inlet manifold cease and black smoke on acceleration are eliminated and I've stuck two fingers up to those who 'jobsworths' who constantly transfer unnecessary costs to the motorist.

Different cars use different methods of manufactured EGR, some are electronically controlled by the ECU, some have an electronically controlled by the ECU but with a feedback sensor that decides the actual valve opening that happens at any point in the varied with load, coolant temperature, pressure differential between exhaust and intake manifold, and other parameters etc, the better designs including VM Motori since about 2010 use active cooling on the EGR. So don't believe everything the man from a garage might tell you but do check that on your particular car the MOD does work without any negatives other than NOx.

Last NOTE if you do the mod, pull the battery terminal for 15 minutes so that the ECU can 're-learn' it's parameters.
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Oh I do so agree with Quinteq about being careful who you let fiddle about in this area.
I've seen so many wild claims about remaps for improved fuel consumption et al. I'm sure some of the remappers have only a hazy idea of what they're doing.

Leedsman.