Its not like I dont have any time available.....
I need my head examined. 2002 GMC 2500 6.0 4x4 hoopdie.
- Thread starter 036.6turbo
- Start date
Are you positive the throttle blade was WOT when doing comp test?
Nope!!!
Yeah, we have plenty of clean junk that literally goes to scrap out here.
I've been heat cycling it and revving the dog crap out of it, it seems pretty dead set on running like crap, LOL.
I did not, rookie mistake. Won't happen again.
Double check spark. Not saying those injectors dont plug up but its usually plugs that fail. Iirc that will screw with balance rates
Thanks, I'll double check. I did accidentally drop (4) spark plugs when I had them out.
Thing is, all the other (5) cylinders, when the scan tool commands the test, you can hear them "flutter" or "fire" as the fuel pressure drops from 58 to 34. Those (3) make no noise at all. Pressure holds at 58. Almost like there's wiring issue on the passenger side bank. But #8 is still playing nice so the ground for that bank is intact., anyway.
But I will verify spark.
If the Pressure doesn't drop, either they are not firing or they are blocked up. When you have Junk and water go through the injectors like that, they don't like it... Rarely do I see them just fail but given how long it sat and the crud, I wouldn't be surprised if some of them are blocked up at the very least.
Could always pull the cylinders not passing the injector leak down and try manually cleaning them and pulsing them.
Also droping the Spark Plugs is bad. They could be damaged and not contributing so definitely verify that.
Need an Injector Pigtail ?
Could always pull the cylinders not passing the injector leak down and try manually cleaning them and pulsing them.
Also droping the Spark Plugs is bad. They could be damaged and not contributing so definitely verify that.
Need an Injector Pigtail ?
Got an ultra sonic cleaner? Might be worth it on the 3 bad injectors.
Ive got a 5.3 out in the garage. Unfortunately the injectors are different.
Yes, no pressure drop, during the balance rate test. The amount of water in the fuel, and the crazy cold temps made me very subspinous that they survived.
The evening, I pulled the first (4) plugs, I sat them on the top cross bar of the plow. Plow assembly was cut loose from the truck, but with the truck inop, they were still physically together. Next day after work, I just backed my daily driver up to this thing, went no further in the shop than to drop a tow strap over the hitch so I could pull it back away from the plow. Plan was to then use the skid steer to get the plow out of my way.
All went according to plan, except I forgot I left the plugs sitting there. The movement of the truck jarred it enough where they rolled off on the floor.
Needless to say, I was not happy about my mistake.
No, I don't believe I do. Thanks.
I don't have one. My fear is that water sat in them and froze. When it expands, things break or move.
Actually, my research showed as long as it's not a flex fuel motor, the injectors are the same 25#. 4.8 / 5.3 / 6.0? But that was just a quick google search, you know how that goes.
I did verify spark; it was present at the plug.
Hit the local Pick A Part, got a complete injector assembly for $45. (8) injectors, both rails and the crossover tube. I didn't think that was too bad of a price. That assembly is from a later model truck with no return. No FPR on the driver's side fuel rail. But the part number on the injectors matches mine so....
I swapped out 2_4_6. Reran the balance rate test. The replacements tested fine. Hit the key and she fired up. Smooth idle.
It is setting codes for fuel trims and lean banks 1&2 o2 sensors. But I'm notting getting too awfully concerned about those with the massive exhaust leak it has at the EGR.
No signs of blow by. No smoke to speak of out the exhaust. Good oil pressure, charging system works as it should as do the cooling system.
I think it's a runner.
I guess next it a complete body swap. cause she's RUSTY.
Thats great news!
Apparently, I'm visiting my MIL in Kentucky over the Easter weekend (yes dear). I may do some research and see if there's a solid cab in southern KY for sale. Drag the GN down behind big black, bring some more junk home. We'll see.
I expect to see a picture of a cab, box and fenders on that GN. Start perusing FB Marketplace and car-part.com now.
Have fun visiting the in-laws while you're down there finding truck parts.
Have fun visiting the in-laws while you're down there finding truck parts.
Yeah basically the regular gas injectors in the GMT800's are the mostly the same as long as they are not from a Flex Fuel. Flex Fuel also uses a different plug too.
There are some minor differences between the gas injectors but they will work and function the same. Always nice when you can match up the same part number.
The only exception to that would be the 99 model year trucks. If you look at a tune file, they are only like #21 Lbs. So I am not sure if they did some magic in the tune or if they Physically changed them.
Glad to hear that fixed your issue. Also being a 2002 and the low miles, It could also have an intake leak at the gaskets. The early gaskets would deform and flatten out. then they would suck in air. They weren't really designed for the Ethanol in today's gas. GM later revised them as a result. If you don't have emissions testing and the EGR is going to fall off, get a non EGR intake or get a plug for the tube and either block the exhaust manifold on the passenger side or swap it out.
There are some minor differences between the gas injectors but they will work and function the same. Always nice when you can match up the same part number.
The only exception to that would be the 99 model year trucks. If you look at a tune file, they are only like #21 Lbs. So I am not sure if they did some magic in the tune or if they Physically changed them.
Glad to hear that fixed your issue. Also being a 2002 and the low miles, It could also have an intake leak at the gaskets. The early gaskets would deform and flatten out. then they would suck in air. They weren't really designed for the Ethanol in today's gas. GM later revised them as a result. If you don't have emissions testing and the EGR is going to fall off, get a non EGR intake or get a plug for the tube and either block the exhaust manifold on the passenger side or swap it out.
Odd thing is the EGR is rusted right off of the mount, but it's not setting a code for EGR.
But if it needs intake gaskets, that will come later. In Michigan we don't have to test for emissions. The big black truck would never pass, lol.
As of now we know the drivetrain is a viable candidate to bring back into service.
I put it up on the drive on lift last night, definitely a lot of rust. All cross members from the cab back, are toast. Actual frame rails have heavy flaking, but no soft or thin spots. So, it could theoretically be saved.
SO yeah, it's moved from the 75% sure it's getting scrapped, to 75% sure I'm gonna bring it back.
FB MP is a drug.
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Heck, thats not that far from you. You could visit Tony @ DHD while you're there.
From what Brick said, the engine I have is from a 99 so that makes sense.
From what Brick said, the engine I have is from a 99 so that makes sense.
Spit balling and exploring options for this turd.
Came across a 2WD SCSB GMT800 abandoned project. Minimal rust.
Got thinking about building a 2500 SCSB. Just remove the running gear from the red turd and install it on the SCSB frame.
But, the 2WD has coil springs in the front and I believe a rack and pinion steering. I wonder if the control arm mounting locations are similar?
Came across a 2WD SCSB GMT800 abandoned project. Minimal rust.
Got thinking about building a 2500 SCSB. Just remove the running gear from the red turd and install it on the SCSB frame.
But, the 2WD has coil springs in the front and I believe a rack and pinion steering. I wonder if the control arm mounting locations are similar?
Oh boy... the front frame section is slightly different. I think the rails might be the same but the crossmember is welded in and different from the 4x4 style. Not to mention the torsion set up and the trans crossmember.
Now if your front frame section is solid enough, you could graph it on to the 2wd frame. The seem is right near the front cab mount.
Yes the 2wd coil over style uses rack and pinion on the 1500 frames. Alot of little things are different between the 2wd and the 4x4.
Now if your front frame section is solid enough, you could graph it on to the 2wd frame. The seem is right near the front cab mount.
Yes the 2wd coil over style uses rack and pinion on the 1500 frames. Alot of little things are different between the 2wd and the 4x4.
That's what I'm seeing. Pretty easy to switch a 2WD 2500 to 4WD. Not so much with a 2WD 1500.