1998 yukon Mystery p0300 and rough idle still

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OR VietVet

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By the way, IMO, the leak down test is not needed unless a definitive dry and wet compression test does not tell you what you are searching for. In over 35+ years in shops, I only needed a smoke test to pinpoint a strange problem one time. Had to do 2 leakdown tests to give an honest real bad news estimate.
 
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OilBurner2003

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By the way, IMO, the leak down test is not needed unless a definitive dry and wet compression test does not tell you what you are searching for. In over 35+ years in shops, I only needed a smoke test to pinpoint a strange problem one time. Had to do 2 leakdown tests to give an honest real bad news estimate.
That’s very good advice, so after distributor and all that looks like I’m doing the lower intake gaskets. Do you have to remove the fuel injectors to get the lower intake off, or does it come out as one piece?
 

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Probably a good idea to do the gaskets anyway, that way it can be ruled out regardless even if the distributor fixed my issues.
My thoughts exactly, IF you are keeping it. Gotta pull dist to do the gaskets anyway. Go over everything you pull apart or take off. Replace if iffy. Watch several you tubes to get an idea of steps. Lots of hacks out there.
 
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OilBurner2003

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My thoughts exactly, IF you are keeping it. Gotta pull dist to do the gaskets anyway. Go over everything you pull apart or take off. Replace if iffy. Watch several you tubes to get an idea of steps. Lots of hacks out there.
Well, lucky for me that I don’t mind working on this thing. I doubt I’ll get it ready in 2 weeks which would be fantastic when it would be most needed, if I have all the parts I can probably get it done In a day or two. This is all saying in theory it fixes my issues. Luckily I have all the free time in the world since the mechanic is backed up all the way through December!
 

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That’s very good advice, so after distributor and all that looks like I’m doing the lower intake gaskets. Do you have to remove the fuel injectors to get the lower intake off, or does it come out as one piece?
To tell you the truth, it has been long enough since been in shops and I am not gonna fake it by looking on you tube or whatever, I dont know for sure BUT to me, makes sense that you do not have to pull the entire injector but the freakin' engineers have let me down before. I have owned a 96 Tahoe but did no serious work on it so cannot honestly answer question. But I bet @east302 can. Man, I hope he is as old as me knowing this *s*h*i*t****
 
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OilBurner2003

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To tell you the truth, it has been long enough since been in shops and I am not gonna fake it by looking on you tube or whatever, I dont know for sure BUT to me, makes sense that you do not have to pull the entire injector but the freakin' engineers have let me down before. I have owned a 96 Tahoe but did no serious work on it so cannot honestly answer question. But I bet @east302 can. Man, I hope he is as old as me knowing this *s*h*i*t****
I wouldn’t mind, but since I have the upgraded injectors now I don’t know how to take them out lol. I will do research now
 

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Well, lucky for me that I don’t mind working on this thing. I doubt I’ll get it ready in 2 weeks which would be fantastic when it would be most needed, if I have all the parts I can probably get it done In a day or two. This is all saying in theory it fixes my issues. Luckily I have all the free time in the world since the mechanic is backed up all the way through December!
If you have the space and time, do it yourself and then learn and know your rig. I made a career of working on vehicles and running shops just because I hated my mom being ripped off after I got out of service and turned wrenches in my uncles shop. He was a Korean War vet and was an aircraft mechanic. He had his own shop in Paradise, Ca. He got tired of seeing me drinking beer when I got out of Vietnam. Made a great career in this industry.
 
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OilBurner2003

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If you have the space and time, do it yourself and then learn and know your rig. I made a career of working on vehicles and running shops just because I hated my mom being ripped off after I got out of service and turned wrenches in my uncles shop. He was a Korean War vet and was an aircraft mechanic. He had his own shop in Paradise, Ca. He got tired of seeing me drinking beer when I got out of Vietnam. Made a great career in this industry.
This whole interest of cars started when the truck we were using on a elk hunt, had a trailer mishap, couldn’t drive the truck because the trailer had a UTV over the rails, had no way to get it back into position with two people. The Yukon came to pick us up and the ride home was…Unpleasant. Couldn’t go 40 MPH without it feeling like it’ll fall apart. Steering was all over the place, I didn’t like the fact it wasn’t reliable. That’s been the whole journey so far, two years later.
 

OR VietVet

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This whole interest of cars started when the truck we were using on a elk hunt, had a trailer mishap, couldn’t drive the truck because the trailer had a UTV over the rails, had no way to get it back into position with two people. The Yukon came to pick us up and the ride home was…Unpleasant. Couldn’t go 40 MPH without it feeling like it’ll fall apart. Steering was all over the place, I didn’t like the fact it wasn’t reliable. That’s been the whole journey so far, two years later.
When you have the desire, no matter the environment, it is what counts. I love my journey to where I am at. Lots are better and even more are worse. I love making things better and right and helping my fellow vets. The thing I love about this industry, is that anyone with the tools and desire can make a living no matter where they live, period. I am very close to 70 years old and I can still make money in a shop or on the side, like I do now. I love my knowledge, even though it is dwindling, and my experience. It is my desire that I still respect above all else. I want to help and want to keep my crap on the road. I love when I am recommended here for older rigs. I know them better than my own rig but I will get there eventually. DO THE SAME!
 

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