WYNNS Diesel EGR System Cleaner Aerosol - Powerful Jet Spray for Deep Cleaning - Dissolves Carbon, Tar & Varnish - Restores Engine Performance & Prevents Starting Issues - 150ml

Fantastic product! Spray into the air intake as someone revs the engine and you should notice a difference right away as you spray it.

Cleaned EGR , works as advertised !

Did the job my van is much faster and not sluggish, But the straw fell into the air intake pipe and cant find it, hoping it will just melt and get chopped up or something according to boy racer forums its shouldnt cause much damage :)) but so far its been running great.

I've had my car for 2 and a bit years, it's a moderately old car, 11 years and counting. I used this after some wynns 7in1 fuel additive. It was running considerably better after but decided to give it some egr/air intake cleaner anyway to keep on top of things. Honestly, the difference was subtle but noticeable, but I don't think there was much wrong with the engine to begin with. I only used half a can of this on my car, I don't think it needed more, and it took 20 minutes as it was, compared to the advertised 10. Maybe I just wasn't being aggressive enough with it. One thing I will note is that most people say to spray it into your air intake or just after the MAF, I read the instructions online and it tells you to put the spray in AFTER the intercooler, preferably into the air intake manifold directly (I put it in after the intercooler just before the throttle body), and also that the car should be run at just under 2k rpm, not idle like a lot of people do. After this, I took it on a run and instantly knew it had done something. The low rpm acceleration was as smooth as silk; I didn't even know there was anything wrong with the car before this. I just thought it was how diesels were. Again, I can't claim it helped my mpg or total power, but I didn't have much of a problem with that after the fuel additive, and my engine wasn't too dirty anyway, but smoothness it helped with. I will definitely be making this a part of my yearly maintenance schedule.

Did not work for me or my Audi Q3

excellent

Very easy to use, used it a few times, have noticed smoother running of the engine right away. I noticed on the last one that I have not used yet it mentioned changing the oil afterwards, emailed them to confirm but did not hear back. Might want to check the instructions carefully before using. It's a good idea to use this before a problem occurs with the EGR as a preventative maintenance, it's cheap enough to do so, and much better than a big repair bill or a break down

Not completely fixed the issue, but definitely some improvement.