Should i blank off egr valve

I have just road tested my Mondeo TDCI after removing the EGR valve, giving it a damn good clean, and re-fitting it with a blind gasket to prevent the exhaust gasses re-entering the valve. First impressions are good- the engine feels more flexible in terms of delivering torque from low revs and following through to higher revs without any nasty flat spots.

The soot from the exhaust is no longer visible in the rear view mirror, and if the 'net is to be believed, the engine will run more economically. The disadvantages? I'm not sure. Blanking the EGR valve is a popular and well-documented modification, but no-one has really followed up on any conversations with feedback 30k miles later to let everybody know whether it caused any problems down the line.

To compound the problem, some people on the 'net are saying that this mod will cause reduced power, economy, and might increase exhaust gas temperatures.

So, is there anyone well-informed on PH who can give me a definitive answer on the disadvantages of this mod? A trawl of recent EGR-related threads just revealed lots of ill-informed speculation about why the valve was there in the first place if it's so beneficial to de-activate it! We all know it's for cleaning up exhaust gasses, right?

The Spruce goose 30, posts months. Thanks for your contribution, It's the Ford 2. It's not a PSA motor. There is no disavantage except your car will be emmitting slighty more NOX EGT will be lower and your engine will be cleaner ie oil wont get contaminated as quickly and the mainifold and head wont clog up with oily carbon I've recently done the same to my Passat tdi which is not common rail and although I've only done about 2k miles since, the results seem to be quite positive.

Clean and reassemble. Odds are that you'll never have to do it again. The fuel is much cleaner these days. Sent from my iPad using Tapatalk HD. I had my intake cleaned by my mechanic during my second timing belt change in part because I was going into limp mode on occasion. Unfortunately, he felt the injection pump was faulty and convinced me to replace it. I didn't know any better and deferred to his expertise.

I'm now just past K miles and am thinking of cleaning the intake again, but worried about rusted bolts and the general pain in the ass of getting it off. My main question is does it actually work? I can't remove any of the EGR related devices due to California's smog inspection every two years, as the inspections require the stock ERG system to be in place.

Vince Waldon Top Post Dawg. Both are mounted side-by-side on the intake manifold. The ASV is the throttle-looking valve that is vacuum-actuated to close momentarily when you turn off the key, reducing engine shudder on shutdown.

The EGR is part of the car's emission control system and recirculates a small amount of exhaust gases into the intake manifold. These exhaust gases are cooled first by a coolant heat exchanger Thus, decreasing or deleting the EGR can have a small effect on engine warmup time. I personally don't think deleteing either will affect engine reving or turbo spooling.

Reducing EGR action will reduce intake clogging, but with todays ultralow sulfer fuel once you clean the intake manifold it will more or less stay gunk-free. Abacus That helpful B4 guy. You guys know he's in Norway, right? Do we even have ASV in our cars? We do not, but he's running a VNT turbo and thus ASV on his Golf, which is vastly different from our wastegated turbos on this side of the pond.

Vince Waldon said:. Nope, you're right, that is a wastegated turbo, so no ASV. Our same Mk3 cars in Europe were fitted with a VNT turbo and not a wastegated one, which was the source of my confusion.

I've removed all my EGR system and fitted a blanking plate, it's had no effect on engine temps. Why did you remove yours Mark? What are the benefits? EGR redirects exhaust gas to replace some of the mixture in the cylinder, this lowers the combustion temperature, and reduces the formation of N0x which forms much quicker at very high temperatures Its all emissions related garbage, which usually leads to heavy intake and valve deposits.

People remove it to prevent this build up In some engines it can, for example, leave enough deposit to halve the size of some airways. Matt82 Capodecina Joined: 13 Mar Posts: 16, The primary purpose of EGR is for reducing the emissions of nitrogen oxide by lowering peak combustion temperatures.

Thanks guys. I think I will blank it off but not remove the system. I don't fancy spending hours cleaning the inlet manifolds to them then being full of soot again! Can you blank it off with a plate but still leave everything connected up?

Even if you live in a hot climate, a little increased wear every day will add up. Cold diesel engines have a lot of blow-by and once the engine is warmed up, the engine seals tighter and gets better fuel economy. By reducing your engine warm-up time with EGR, you reach optimal fuel economy sooner in every drive. Emissions with a cold engine is especially dirty. If a turbo leaks oil into your EGR-deleted intake, the engine may start running on its own.

It will continue to rev high until potential damage occurs. Or until you shift into a high gear and stand on the brakes to stall the engine.

The EGR has a valve that can block airflow from entering into the intake once you turn the key off, thus suppressing the oil burn and stopping the runaway. This may not be a big deal to some people, but the engine will shake noticeably when turned off, if the intake swivel valves are removed. D ynamic EGR optimisation seeks improved performance and cleaner intake system whilst still retaining the benefits of the EGR system. Some customers who still have their stock performance tune have noticed slightly improved low RPM response, especially off the line.

Your intake will be free of soot build-up much longer, perhaps even the lifetime of your vehicle. Software tuning of the EGR feature has been in use for a year with no issues.

It requires a custom tuning remap not a delete. Other features are available with remapping and tuning of the ECU.