![]() Anythings possible - and not knowing if that clip is suppose to freely move up and down. Now I don't have a clue if that's what fixed it. Put the car back together and no more issues. Put the clip back on and insured that it moved freely. ![]() The clip had three long prongs that appeared to allow it to slide up and down on that breather.įound some gunk on it and cleaned it. I removed the some of the oil and gunk on the clip covering the tube. Is it possible the breathing system was disrupted during the gasket replacement and now needs to just be replaced?Īfter using a smoke machine on my car and seeing that little plastic breather leaking. I did have an ever so slight idle issue before replacing the valve cover gasket, but nothing like it is now. Is this piece suppose to be able to breathe like this? Should smoke be exiting the system here? Nothing connects to the end of this piece - it just has a little guard around it that is able to slide up and down a bit. ![]() There is only one place that is leaking - it's coming from a tiny valve/connector type piece off of the valve cover. So before I go ahead with this I smoked the car today to check for leaks. It is my understanding that the pvc system and crankcase vent valve are all part of the valve cover. I've been told that the most likely fix is to replace the valve cover itself. Car surges and nearly stalls (sometimes does) when coming to stop and I know after searching everywhere that this is a common issue with all sorts of causes.Ĭheck engine light is on with the following codes -ĢD29 Pressure Difference - Suction tube Plausibility I guess a log when it’s cold in the morning and idling would probably tell me some good info…it just seems like I’m always short on time and heading to work when the CEL pops up.Valve Cover leaking onto exhaust - had gasket replaced along with plugs and I've had a running issue ever since. Would resetting the Lambda Sensors, Lambda Regulations, and Octane Rating adaptations after I load the E40 tune help to speed up the relearning process so I don’t get those codes for the first couple tanks of fuel? It only happens when it’s under 45f out in the mornings it seems, I’m guessing the DME has to richen the mixture up enough at idle with E40 in cool temps that the STFT’s are just getting out of range? The car runs great, logs look great, not a single issue as far as performance goes….just trying to understand when I get these Mixture Control codes every spring when I first start running my custom E40 tune. After I run a couple of tanks of fuel through it, it stops throwing the Mixture Control codes, and it’s fine all summer long. I clear the codes, and they never come back until the next really cold morning when I fire up the car and let it idle for a while. When I scan it, it shows 29E0 Mixture Control Bank 1, and 29E1 Mixture Control bank 2. I’ve had this problem for the last several years, ever since I started running my custom E40 tune.Įvery spring when I switch my car from my 93 “winter” tune, to my E40 tune, for the first few tanks of fuel, whenever I start the car up in the morning and let it idle for a while to warm up, it will pop up a CEL. 29E0 & 29E1 Mixture Control codes when switching from 93 to E40 tune?
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