Rmartin-97
Active member
So that means I still have a reason y compression is down on number 8. I thought maybe the injector was puttin to much fuel in the cyl and the rings wearnt seating maybe causing the compression difference.
Another cracked piston
- Thread starter Rmartin-97
- Start date
So that means I still have a reason y compression is down on number 8. I thought maybe the injector was puttin to much fuel in the cyl and the rings wearnt seating maybe causing the compression difference.
webb06
Active member
here's what i would do:
compression test #8..
get it started to see if there are any leaks causing the fuel in oil issue
- if the above doesnt score any results then.....
remove #8 injector, flip it over and attach it back to the jumper line and keep it plugged in. so the injector will be attached to the engine so you can watch the spray pattern, and it will still start and run on 7 cylinders. watch the spray pattern of the injector and STAY AWAY from it (watch from a a few feet away and put your arms NO WHERE near it). if the pattern is a fine spray then it should be okay, if it doesn't spray or maybe dribbles down the side that could be the problem.
compression test #8..
get it started to see if there are any leaks causing the fuel in oil issue
- if the above doesnt score any results then.....
remove #8 injector, flip it over and attach it back to the jumper line and keep it plugged in. so the injector will be attached to the engine so you can watch the spray pattern, and it will still start and run on 7 cylinders. watch the spray pattern of the injector and STAY AWAY from it (watch from a a few feet away and put your arms NO WHERE near it). if the pattern is a fine spray then it should be okay, if it doesn't spray or maybe dribbles down the side that could be the problem.
Rmartin-97
Active member
Ok I actually have the injector hooked up like that now. I'll run it tomorrow and see what I get as far as leaks an the pattern on the injector. I'll have to check compression next week wen I can get a gauge.
Bair
Member
You can bump rail pressure up at idle with IDS if you want. 5k should show a leak but 10k would for sure.
96 CCLB
08 RCLB 2wd 6sp
08 ECLB 2wd for sale
96 CCLB
08 RCLB 2wd 6sp
08 ECLB 2wd for sale
StockCar#10
Member
Ok so that seems a little out there to flip tbe injector over. If the 8 cyl doesn't show any contribution the take the number 6 in an swap them an start it!! Don't start it with it running an not in the cylinder... bad deal
webb06
Active member
have your tried it? because i have and it works....its not going to hurt anything with nothing in the injector sleeve and the injector, if working, with just spray a fine mist...
StockCar#10
Member
An what happens if the injector is working? Spraying fuel everywhere sound like no fun. Much easier to swap them if that cylinder follows then its junk. Replace it. And op if you are having fuel in the oil and hard to fjnd the source. put some floresent dye in the fuel system. Black light test it with the engine running
Bair
Member
And op if you are having fuel in the oil and hard to fjnd the source. put some floresent dye in the fuel system. Black light test it with the engine running[/QUOTE]
So you get fuel/w dye in the oil now. oops now you have dye, EVERYWHERE. Because, fluorescent green dye lubricating the rockers.
96 CCLB
08 RCLB 2wd 6sp
08 ECLB 2wd for sale
So you get fuel/w dye in the oil now. oops now you have dye, EVERYWHERE. Because, fluorescent green dye lubricating the rockers.
96 CCLB
08 RCLB 2wd 6sp
08 ECLB 2wd for sale
StockCar#10
Member
So you get fuel/w dye in the oil now. oops now you have dye, EVERYWHERE. Because, fluorescent green dye lubricating the rockers.
96 CCLB
08 RCLB 2wd 6sp
08 ECLB 2wd for sale[/QUOTE]
Yeah the dye is safe to use in both the engine oil an fuel system...
That it does but if you can't find the leak you might have to spend the time to find it. Its not my first trouble shooting option. Its just one that I would use
Last edited:
StockCar#10
Member
Cummins3376891
webb06
Active member
Obviously you don't realize how fine the spray is. It's not like a water hose spraying underneath the hood lol you only have to run the engine for a few seconds to see if its firing or not. But whatever you say. Just suggesting what I would do and have done
StockCar#10
Member
I do realize the spray pattern there's just more ethical ways to do it IMO. To Each there own:toast:
Bair
Member
Yeah the dye is safe to use in both the engine oil an fuel system...
Riiight. That's not what I meant. My point was that now you have dyed fuel polluting the oil. Then that dyed oil is running down all over the valve train making a fuel leak very difficult to pick out. But my point has already been made by others. I just wanted to clarify my words to you.
96 CCLB
08 RCLB 2wd 6sp
08 ECLB 2wd for sale
sootie
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wut?! i didnt realize this was a matter of ethics-i thought someone was sharing tips from experience on how to troubleshoot an issue. Damn.
webb06
Active member
I think "logical" was the word he was looking for haha!
StockCar#10
Member
Yeah they were sharing, he shared his an I shared mine.
Thank you web! that was the word I was looking for
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Rmartin-97
Active member
Ok I ran it today with the valve cover off I can't find any leaks. Ran it with the the injector out and it spraye a nice lookin pattern. I wonder if maybe I had a leaky line and I already tightened it bak up while it was apart.
webb06
Active member
That's good. Did you check the compression on that cylinder yet?
Bustedknuckles
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You need to check compression for sure. A buddy of mine owns his own shop and did about 10 grand worth of work on a customers truck (ported heads, RCD turbo's, springs, pushrods, manifolds and up pipes head studs etc) and it cracked a piston on the first test drive with the H&S still on stock.....
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