] but the truck runs great other than 4700 EGT's @ 2,000 RPM empty
Engine Trouble!
Thread Starter
|
Elder User
Joined: Apr 2006
Posts: 894
Likes: 0
From: South Dakota
Well, an update on the truck guys:
Tonight I got home at abour 4pm and decided I would give the truck a shot. It hasn't been ran in about 2 weeks because I have been trying to troubleshoot it. About 39 degrees outside, pretty nice sunny day. First, I went and put in a good dose of Diesel Kleen in it since I had that ULSD in the tanks. I went to start it as you guys advised and about 4 seconds of cranking and she fired right up!! Runs like a champ and no choppy idle at all during start up, it was nice and smooth. Only 1 very small puff of smoke at startup.
I let it warm up to full operating temp and took the old girl for a drive. As I was pulling out of the driveway I noticed a light blue color smoke as I was heading up out of the old creek bed. I drove it a bit further and turned around to head home. On the way back, I put my foot down and yet again some light blue smoke. Even reving it and it smokes a light blue. I'm guessing that the CDR needs to be serviced. Do you guys think so or is there another problem?
Tonight I got home at abour 4pm and decided I would give the truck a shot. It hasn't been ran in about 2 weeks because I have been trying to troubleshoot it. About 39 degrees outside, pretty nice sunny day. First, I went and put in a good dose of Diesel Kleen in it since I had that ULSD in the tanks. I went to start it as you guys advised and about 4 seconds of cranking and she fired right up!! Runs like a champ and no choppy idle at all during start up, it was nice and smooth. Only 1 very small puff of smoke at startup.
I let it warm up to full operating temp and took the old girl for a drive. As I was pulling out of the driveway I noticed a light blue color smoke as I was heading up out of the old creek bed. I drove it a bit further and turned around to head home. On the way back, I put my foot down and yet again some light blue smoke. Even reving it and it smokes a light blue. I'm guessing that the CDR needs to be serviced. Do you guys think so or is there another problem?
Posting Guru
Joined: Mar 2005
Posts: 1,701
Likes: 0
From: KY
Here we go. Now we are talking about off set keyways. Now we will get on changing buttons on Bigcams. Taking the stop screws out of 7FB 3406's, overdriving old 9speed front boxes and throwing on 13 speed back boxes with 24" rubber and 270 gears. 
I am leaning towards leaving the cam timing alone but fooling with the lift a duration with modified rocker arms. Also solid lifters. There is alot of potential with the 6.9's.
Dave you may be burning a little bit of oil or you have one cylinder with a broken oil ring. I have seen that happened. The motor would still start good but the broken oil ring can cause a little oil burning. You may very well be right also. Does the exhaust have a strong acid type smell?
I am leaning towards leaving the cam timing alone but fooling with the lift a duration with modified rocker arms. Also solid lifters. There is alot of potential with the 6.9's.
Dave you may be burning a little bit of oil or you have one cylinder with a broken oil ring. I have seen that happened. The motor would still start good but the broken oil ring can cause a little oil burning. You may very well be right also. Does the exhaust have a strong acid type smell?
Thread Starter
|
Elder User
Joined: Apr 2006
Posts: 894
Likes: 0
From: South Dakota
Do you think that this may be caused by the valve stem seals that I had done a few weeks ago? I'll have to clean my CDR when I get home tonight but that is the only other thing I can think of...
Lead Driver
Joined: Jan 2005
Posts: 7,782
Likes: 221
From: Huntington Indiana
One thing to remember by adding the diesel clean it CLEANS everything out and it goes out the exhaust. It could be the diesel clean smell you're getting. Run it for a while by driving it. Give the chemical a chance to work before doing other diag. Just go slow, one step at a time.
Posting Guru
Joined: Aug 2006
Posts: 2,175
Likes: 0
From: Kent WA
Originally Posted by Dave Sponaugle
4700 degree EGT @ 2,000 RPM empty?
That is a problem.
That is a problem.
It would be the molten puddle of pistons in the bottom of the oil pan. At least that would be the biggest problem....
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
OOOPS , yes it's a typo....one too many zeros! It's more like 470 EGT's
New User
Joined: Nov 2006
Posts: 21
Likes: 0
engine trouble
re the cam timeing rubarb, car craft mag did a piece about ten years ago and as I remember the big difference was less than ten hp in a roughly 400 horse motor. I believe advanceing 5 degrees lowered the hp curve 2-300 rpm and retarding raised it the same. It was done with an offset key. The point being a drag engine needs every little trick and with enough 5-10 horse add ons you might gain a couple 10ths in the quarter. The remark by Dave about cam lift was right on without flycuts in the pistons, but duration with porting could help considerably. Don't look to me for specs as I havn't a clue, that would go to a cam specialist. rockers with higher ratios give more lift and coincidently longer duration but we are back to the old piston again. Flow, flow, flow is what it's all about. Flow air, intake, pump[turbo, supercharger] ports in heads opened and matched[intake/exhaust] headers and open exhaust. Then the proper fuel mix at the right time = horsepower. No short cuts, just a bunch of steps as can be afforded towards the end game. PS, for those who read my last post the new shoulder is doing fine.
Thread
Thread Starter
Forum
Replies
Last Post
BillShaw89
1987 - 1996 F150 & Larger F-Series Trucks
12
Jul 13, 2014 07:24 PM
01PowerStrokeF250
1999 - 2003 7.3L Power Stroke Diesel
5
Jan 17, 2008 11:21 PM
Pocket
Bio-diesel, Propane & Alternative Diesel Engine Fuels
2
Feb 14, 2006 07:39 PM
