AcIdBuRn02ZTS
New member
- Joined
- Jun 30, 2013
- Messages
- 139
Hey guys..
Ive been dealing with issues on my 4bt for a month or so now.. I had noticed a very light misfire at idle and just off idle that seemed to go away once rpm picked up...
Then my ve pump started leaking between the case and head..
After getting that fixed and replumbing the feed and return lines with -6 stainless braided line (broke a return line during disassembly.. was cheaper to convert to all AN then replace it with a factory line)
Anyways.. truck ran good.. just still had a light misfire.. the engine just shook a bit more then it did when I first put it in the truck.
After bleeding and bleeding the injectors, I noticed that numbers 1, 3, and 4 made a huge difference with the lines barely cracked.. #2 not so much.. had to back the nut off 2-3 turns before it really started to misfire.. plenty of fuel coming from the line.. I figure maybe its an injector issue. The pump shop that helped me recalibrate my pump after I did the reseal offered to test the injectors for free.. so I decided to pull them tonight.
1, 3, and 4 came out easy with a light tap of my home-made slide hammer
(piece of bar stock with a 12mm 1.5 pitch nut welded to the end.. a weight in the center and a nut on the other end to act as a stop)
Number 2 injector wouldn't budge. After 30 minutes of beating on this thing with my slide hammer, I then beat the piss out of my slide hammer with a 3# sledge which slowly but surely drove the injector up and out of the bore.
The injector bore was coked with carbon as was the injector.. couldn't see the groove near the end of the injector body.. and there wasn't a copper ring on the injector like the other 3...
This is what I found in the bottom of the bore..
That's all I found of the copper crush washer.. it was blown to pieces and the pieces I found were deformed a good bit.
Any ideas on what would cause this? The injector retaining nut was tight and what not.
Anyways, still having the injectors checked out tomorrow since they are out.. but Im thinking the problem was the crush washer all along. I've never had the injectors out of this engine before and never had an issue until recently.
Could using starting fluid cause this to happen? I had to use some when I was working on the pump.
I just hope that none of the little pieces fell into the cylinder. I cranked the engine over a dozen times or so and blew all the junk out of the injector bores and I didn't hear any odd noises, etc..
Thanks guys
-Chris
Ive been dealing with issues on my 4bt for a month or so now.. I had noticed a very light misfire at idle and just off idle that seemed to go away once rpm picked up...
Then my ve pump started leaking between the case and head..
After getting that fixed and replumbing the feed and return lines with -6 stainless braided line (broke a return line during disassembly.. was cheaper to convert to all AN then replace it with a factory line)
Anyways.. truck ran good.. just still had a light misfire.. the engine just shook a bit more then it did when I first put it in the truck.
After bleeding and bleeding the injectors, I noticed that numbers 1, 3, and 4 made a huge difference with the lines barely cracked.. #2 not so much.. had to back the nut off 2-3 turns before it really started to misfire.. plenty of fuel coming from the line.. I figure maybe its an injector issue. The pump shop that helped me recalibrate my pump after I did the reseal offered to test the injectors for free.. so I decided to pull them tonight.
1, 3, and 4 came out easy with a light tap of my home-made slide hammer
(piece of bar stock with a 12mm 1.5 pitch nut welded to the end.. a weight in the center and a nut on the other end to act as a stop)
Number 2 injector wouldn't budge. After 30 minutes of beating on this thing with my slide hammer, I then beat the piss out of my slide hammer with a 3# sledge which slowly but surely drove the injector up and out of the bore.
The injector bore was coked with carbon as was the injector.. couldn't see the groove near the end of the injector body.. and there wasn't a copper ring on the injector like the other 3...
This is what I found in the bottom of the bore..
That's all I found of the copper crush washer.. it was blown to pieces and the pieces I found were deformed a good bit.
Any ideas on what would cause this? The injector retaining nut was tight and what not.
Anyways, still having the injectors checked out tomorrow since they are out.. but Im thinking the problem was the crush washer all along. I've never had the injectors out of this engine before and never had an issue until recently.
Could using starting fluid cause this to happen? I had to use some when I was working on the pump.
I just hope that none of the little pieces fell into the cylinder. I cranked the engine over a dozen times or so and blew all the junk out of the injector bores and I didn't hear any odd noises, etc..
Thanks guys
-Chris
