Short story, towing 5er to Michigan for work from Dallas TX , started smoking and knocking or something under the hood, pulled over. Limped to the next exit that had an rv park. Put IDS on it and #8 is dead. Also either cam or crank sensor code with it. But I'm pretty sure that's a by product of the abrupt loss of the cylinder. So either I'm replacing that injector tomorrow or buying a new truck! But the dealerships aren't open within an hour of here on a Sunday, so I would have to buy from O'Reilly or AutoZone or the like. Or wait until Monday but in supposed to be in Michigan by today at 1pm... kinda at a crossroads with this truck. Open to suggestions.

 

Do you have the tools to replace the injector?
I guess if time is that critical I would roll the dice with a non OEM injector to at least get you going.

 

Yes I do! Just did #5 and decided I would always have then available now! Lol at least this is the easy bank. Not sure I have my 1/4"torque wrench though. Last thing I need after is a HP oil leak...

 

Out of curiosity, what would happen if you unplugged a bad injector and ran on the remaining 7?

If you have an uneven crank sound, like it has no compression on 1 cylinder, it's too late BTW... You already have a hole in something like a valve or piston. I've been there, trust me that's what it sounds like cranking with a torched exhaust valve and a melted piston...

 

Crank sounds fine. Starts fine. I'm not counting out a broken valve though. There is a noise I haven't heard before when I lost #5. It runs like an engine with a misfire. LOL shakes, lacks power, smokes, turning the injector off using IDS didn't make a difference. And I'm towing 15k so that complicates things. The noise is a loud slapping or tapping noise. Speeds up with rpms. I'm concerned it may be beyond an injector but I'm hoping. So no I can't run on the 7. I limped it a mile to an rv park but I'm hesitant to go further.

 

Okay I was able to get an injector on a Sunday for that I'm very thankful. Put it in got everything button back up turn it on and according to IDs number eight is still dead. I did the relative compression test and cylinder 1 and cylinder 8 are both below cylinder 1 is 19% below cylinder 8 is 12% below what does that mean?

 

Serious engine loss of compression. The percentage is way low, 3% is a concern to me. So either compression is being lost due to integrity of an injector sealing to the head, piston hole or sidewall damage, valve damage. Not going to know until it comes apart. While it might be from fluid not being blown out of an injector screw hold down, you had the loss before replacing the injector.

Considering you had to do 5 recently, you might have an issue with fuel pressure or quality, damaging injectors. Damaged injectors don't play nice with pistons.

Can you do a video of it cranking over with the starter jumper?

 

All 8 pass elector click test. #8 is not firing at all on injector contribution test.

 

https://youtu.be/Xe9XoJ50snc

 

Also I did the blue spring upgrade when I did 5.

 

That miss during cranking means no compression in 1 cylinder. I don't have time to type details, but you need diagnosis and repair. It could be salvageable if you don't drive it any more .

 

Yeah there seems to be some metal noise like clicking or tapping or slapping to go with the idle. But it's not quiet.

 

Unfortunately that motor either has to come apart or looked into with a bore scope.

 

Take the oil filler cap off

Start the engine

Is it blowing out the oil fill port
ideally it should suck or have slight draw air into the oil filler port

Any CCV MODS

 

I'm sorry I'm going to have to table this thread for a little bit. Had to get on the Michigan so I left the truck behind I'll get back to it in a couple weeks and see if I can figure something out. But I'm thinking something bad happened inside.