I have a EGR issue with my car according to my SEL and will be taking it to the meachinc in a couple of weeks to repair. A friend told me to unplug the vacum hose that plugs into the top of the EGR valve until I get it addressed and the engine will not ping and run as rough. I doubted him but he w…

I’m not going to be able to provide you an answer - but having missed your previous discussions and only seeing a couple of your posts, how do you know your car has a bad headgasket? You describe losing a gallon of coolant every 6-7 weeks, which seems like a lot to not have any in the oil or to not…

Simply put…the egr valve dumps exhaust gas into the intake. That’s not a performance boosting act but it’s required by the EPA. As Caddyman said “Engines ran just fine without EGR valves for 80 years…They still do today…”.

I took it in and my number 1 cylinder has very low compression and they did a leak down test and got air up through the radiator overflow jug and out the tailpipe, which I am told are all signs of a bad headgasket. I have 0 in the oil or out the exhaust, i have no white smoke coming from teh tailpi…

The EGR system meters a little exhaust gas into the intake which lowers the combustion temperature which lessens the amount of NOx in the exhaust. The engine will run better without it but will produce more smog. Over a long period of time the higher combustion temperature can cause valve damage.

What is a “long” time period? Are we talking days, weeks, months or a year or so?

Years. I have seen many engines torn apart that did not have an egr system and the valves were fine. A few minutes on the valve grinder and they went on for many years more. It’s mostly theory and very difficult if not impossible to prove.

So odds are my headgasket issue will kill my engine long before a problem from not having the egr valve working?

It sounds like the EGR pintel valve is open with this vacuum line connected. There should be no vacuum to the valve at idle(pintel should be seated) perhaps the line in connected to an incorrect source. A engine without mechanical defects (not yours) and a properly configured and operating EGR syst…

I am not sure what you mean? My car registerd a P401 code which the sheet says is an ERG issue of some type. My friend said until i get it fixed to just unplug the hose that connects to the top part of the mushroom shaped EGR valve and the knock and pinging would be less and it is. So are saying t…

Why does an unpluged egr valve run better then

Maintenance/Repairs

Caddyman April 6, 2010, 6:35pm 3

Engines ran just fine without EGR valves for 80 years…They still do today…

Topic		Replies	Views
Egr Maintenance/Repairs pickup , nissan	9	928	August 5, 2010
Egr not working after second smog check Maintenance/Repairs	2	279	September 21, 2008
EGR (is it safe to..?) Maintenance/Repairs	7	2254	April 18, 2009
EGR valve question Maintenance/Repairs mazda , protege	16	5155	December 23, 2009
Do I need a Exhaust Gas Recirculation (EGR) Valve? Maintenance/Repairs valves	8	38464	November 19, 2008

Why does an unpluged egr valve run better then

Related topics