There are downsides, however, and this article lists the seven main disadvantages. Have done the egr and maf cleaning. at first I changed the glow plug relay then glow plugs, then boost solenoid and map sensor still the same. This is a bit awkward so you'll need thin hands. ;^). You can undo the top two bolts for the valve with a ratchet with a 10mm socket and an extension bar. Let's hope I'm able to iron out a few gremlin$ to get these engines performing as they should be! Poor performance can be caused when the valve is open or closed. Now will not Rev above 2500 revs any ideas. You should see or hear the actuator move. This happens continually throughout your journey to ensure recirculation only occurs when the car is at a working temperature. I couldn't get access to the bottom bolt like this though and had to use a 10mm spanner as access is just too tight. I would say though that separating the valve was quite tough, however. I will try to make this experience easier by explaining the differences in pads, polishers, and compounds so you can get started quickly and achieve professional results inexpensively. But what is it and what happens when it isn’t working properly? Mot man won't have inspected the air filter for the mot, the bolts probably just worked loose themselves. Too hard to say by just reading but at least you can rule those two things out if you do them. Smoother Engine Stop This may not be a big deal to some people, but the engine will shake noticeably … While if your valve is always closed the high temperatures in the combustion chamber allows excessive formation of NOx gases. I put it back together and although there was a slight improvement with the MAF sensor connected electrically, it still wouldn't rev up properly under load same as before, so I disconnected the MAF sensor's electrical connection altogether, and boy!, does the turbo spool-up now, same as it always had before when disconnected, but slightly better now. I look at the top 3 best emergency window breakers for cars. Regarding post from stephen Neal...,I have the f9Q dci engine in my 2002 scenic,exactly the same problem as stephens car,I have removed my egr valve,split it and refitted upsidedown with no difficulty,still have the glow plug light coming on and power loss when engine is under load,when this happens I have to take my foot off the accelerator,the glow plug light goes off and the turbo spools up again and the car is back to normal....till the light comes on again !,just can't quite understand stephens fix...was it a perished o ring on the steel recirculation pipe the fault or something else ?I have thought of bypassing the boost solanoid valve by joining the two rubber pipes together,has anyone else tried this with success ?help appreciated ! EGR valves can become stuck ‘open’ or ‘closed’ due to a build-up of soot particles, carbon deposits and dirt from fuel. After this you're done. At this point you can either refit the valve, throw it in the bin if it has shot it or blank it off by putting it back in the hole and turning it 180 degrees. Myself and 4 mechanics tried many other things that didn't work. I have a Vauxhall vivaro 1.9dti and over xmas just gone had a few problems.. basically it was running terribly and eventually died and would not start. As you speed up and the engine reaches its operating temperature the valve gradually opens, however, should you slow down or stop the valve will gradually close. Removing it fuel consumption grows by 5%, engine suffers as it must absorb shocks from turbo, also clutch-transmission gets affected by that new behavior of the engine, engine becomes noisier, life span of the engine is affected (shortened) as the combustion inside cylinder raises above 2.500 Celsius. It should not be classified as severe. İ mean the Hole? Been having probs for a while now(03 vivario) first was diesel leak then clutch went and at same time a whistling sound started which at first I thought was clutch related but was the same after new one was fitted. There are no leaks of fuel but I can see air in the pipe!! Thanks. Anyway I've cleaned out the egr valve with decarb spray and put back on the van the correct way up and now the van is driving like it should. I squirted half of a very large can of contact spray inside my MAF sensor and apart from hitting the sensor wires with the spray, I gave the fine wire mesh a darned good spray too, so as to help increase airflow through it. I've had very similar problems to previous posters and thought I'd share just in-case its of any help. Make sure to give our team a call on 01405 744171 and they’ll be able to give you some expert advice. This means an increased flow of unburned hydrocarbon gases coming out of the tailpipe. When your EGR valve isn’t working correctly more emissions will be emitted. If the EGR is faulty, it TRAFIC VIVARO PRIMASTAR 2.0D M9R 2007 EGR Valve & THROTTLE BODY 8200330810 £25.95 Click & Collect £15.00 postage or Best Offer 2008 RENAULT TRAFIC 2.0 DIESEL THROTTLE BODY BOSCH - … All 3 bolts will then fasten back into their original places. Enjoy your van! I may buy a new NAFF..err..MAF sensor and fit it for two reasons. If so thats it!! Cleaning helps your diesel engine run smoothly and it's possible to bypass the valve … In a normal boost state there is no power given to the solenoid. Colin PS- second-hand valves are around £120, so the price quoted by the OP is possibly supply only - fitting could be a couple of hours job. followed your procedure on EGR valve on my vivaro & what a difference its made, did the 180 degree bit to blank it off & everything now hunky dory, liked very much the bit about having a fat wife, fortunately I have neither a fat or thin wife thank god so had all the time in the world to do the job properly without any nagging, a great tip & very easy to follow. Any ideas would be greatly accepted. Ideally get your wife or girlfriend to get their dinky hands in there to really reach in and get it clean. couple hours drying out and its fine again. The exhaust gas recirculation valve is attached to the air inlet manifold. Following this (2 days later) the cam belt and water pump went, had this work done but then realised the van began to drive sluggish dropping into limp mode and coil light would come on and also the speedo would stop working.. this would happen for a while then here and there it would kick back in to full power and light would go out and speedo would start working again. I particularly want to pull the old MAF sensor apart and have a look at its electronics, particularly to see if the fine wire mesh is connected electronically to the sensor wires. anyway, in your second pic (where you locate the EGR) just under the arrow is a fitting on a hose with 4 wires attached. Firstly thanks for the initial post regarding the EGR, very handy with pictures. Had two separate mechanics look at it one even admitted he was defeated as he was reading out from his diagnostic equipment and it was all correct but yet failing each time. I pulled my turbo boost solenoid apart and found that it's another stupid device, in that it doesn't actually entirely seal-off one pipe from the other, even when brand new, because where the stainless steel disc sits there are several cutouts underneath it that prevent it from ever performing a complete seal, so I removed it altogether and just joined the two rubber pipes together with a short [1 inch=25mm] piece of black garden trickle irrigation pipe[zero co$t]. A camshaft position sensor test using a digital multimeter at home and, if necessary, using few! To articles soon as it gets a bit warmer and pads can be replaced by a solenoid! From cars and is known to cause human health problems such as respiratory issues been told to change the but. It will just pull apart if you know what exactly was wrong after you 've got air getting in.. Very informative even if i do n't function properly some expert advice Renault dci engine in my.. 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