I had a fuel injector go bad the other day on my 2002 XG350 - apparently it was spraying gas all the time. I was able to limp home and then got screwed by the local garage when they fixed it. $600 to replace a fuel injector and do shoddy work like forget to plug one of the electrical connectors back together, leave the back 7 bolts on the plenum lose, forget to tighten one of the hose clamps on the air snorkel altogether, and over tighten the oil filter when they changed oil (that I didn't authorize). But all that is in the past, or is it?
A few days later the check engine light lit up and the code is P0401, EGR flow insufficient. Needless to say, I don't want to bring the car back to that garage (I'm sure they could scam some more money out of me - they were really slick). From what I could get out of the web site and my service book, this almost looks like a low vacuum problem rather than an EGR valve problem. Any recommendations as to how to fix it? I have a second 2002 XG350 that I can swap parts back and forth with. Also, If the EGR valve is a suspect, how does it come off? There are 2 bolts that hold it to the polonium, but then there is a big nut connecting it to a tube...looks like there isn't enough room back there to get a wrench on the nut. If the nut does come off, is there some sort of thread sealant required when you re-install? sparkplug antiseeze compound maybe? Also the manual stated that the EGR gasket should be replaced. How important is this? - I've done spark plugs a couple times and have never bothered with the EGR gasket.
Thanks
Dan