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Old 09-01-2018, 06:53 PM   #11
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It seems to throw egr code.
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Old 09-01-2018, 09:17 PM   #12
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Have you checked to see if there is a possible vacuum leak. That would possibly explain the code, if the egr is leaking.
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Old 09-01-2018, 09:22 PM   #13
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Air temp sensor mounted in the bottom of air cleaner can make it run rich as well.
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Old 09-01-2018, 10:33 PM   #14
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Quote:
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It seems to throw egr code.
What code was that you got?

Pull it off, and use carb cleaner to free up the air passages.
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Old 09-01-2018, 10:41 PM   #15
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I'm really hoping it's not the egr, that thing is almost impossible to get to
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Old 09-02-2018, 01:51 AM   #16
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I'm really hoping it's not the egr, that thing is almost impossible to get to
lol - it's all kind of relative. Putting headers on seemed impossible. Drilling out busted exhaust manifold studs was nasty. Getting to the #6 spark plug on the VG engine is more work than it should be. The knock sensor on the VG engine is a serious pain in the ass.

Seems like the EGR valve requires a really big wrench, too. Like a 27mm. The nut holding it on is so freaking tight from all of the heat cycles it's been through that one of those adjustable end wrenches (often called a Big Crescent Wrench) will not grab. And it takes lots of PB Blaster on that nut going to the exhaust manifold.
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Old 09-02-2018, 02:19 AM   #17
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It's not fun. There are also 2 nuts/bolts and a flare nut fitting to undo. The flare nut is at a stupid angle so a lot of patience is needed. It might be easier to use a 12mm Crowfoot flare nut wrench if you have one. 30mm is the size you'll need for the big one if I remember correctly. Hitting the wrench with a hammer helps too.

The truck is still driveable, right? It helps to hit it with PB blaster every day for a few days before you actually plan on removing it. Also spray the egr pipe at the fitting coming out of the manifold so it can swivel a bit. For the big nut it also helps to drive the truck first and break it loose while it's still hot. The BPT valve is kind of in the way too but it's pretty easy to get to fortunately. Be prepared to replace some old brittle vacuum lines while you're at it. My EGR valve was so gunked up I just replaced it instead of trying to clean it.
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Old 09-02-2018, 02:42 AM   #18
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What did your truck run like with bad egr?
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Old 09-02-2018, 04:26 AM   #19
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I never noticed anything unusual, but mine was stuck closed. I could see how it could cause a poor idle if it was stuck in the open position.
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Old 09-03-2018, 12:43 PM   #20
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To get the EGR valve off my KA24E, I decided to take the cross-pipe off at the exhaust manifold instead (runs behind the engine). It was rust-welded on, though, to the manifold but did come loose after days worth of presoaking with Liquid Wrench or PB Blaster/tapping with a hammer. Fortunately new cross-pipes were available, so I replaced it in case I have to do that job again someday.
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