Ruff start blue smoke???? HELP PLEASE!!!!
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Junior User
Joined: Aug 2007
Posts: 93
Likes: 1
From: Mound LA.
Ok guys..............finally got the time to change the wireing around to the IHR and still have the smoke? Here is the best way I can discribe it.............
Cold start:
-First crank it little black followed by blue.
-Blue smoke remains until it warms up.
-During warm up if give it quick short throttle rev it, smoke goes away as rpms increase but as soon as you let off throttle you get blue smoke as the rpms decrease back to idle.
Anyway..............any other ideas? I read that blue smoke is normal on cold start but it was'nt doing it when I got it and now it is? Thanks again everyone!!!!!!!!!!!!!
Cold start:
-First crank it little black followed by blue.
-Blue smoke remains until it warms up.
-During warm up if give it quick short throttle rev it, smoke goes away as rpms increase but as soon as you let off throttle you get blue smoke as the rpms decrease back to idle.
Anyway..............any other ideas? I read that blue smoke is normal on cold start but it was'nt doing it when I got it and now it is? Thanks again everyone!!!!!!!!!!!!!
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by JDJHNTR
Ok guys..............finally got the time to change the wireing around to the IHR and still have the smoke? Here is the best way I can discribe it.............
Cold start:
-First crank it little black followed by blue.
-Blue smoke remains until it warms up.
-During warm up if give it quick short throttle rev it, smoke goes away as rpms increase but as soon as you let off throttle you get blue smoke as the rpms decrease back to idle.
Anyway..............any other ideas? I read that blue smoke is normal on cold start but it was'nt doing it when I got it and now it is? Thanks again everyone!!!!!!!!!!!!!
Cold start:
-First crank it little black followed by blue.
-Blue smoke remains until it warms up.
-During warm up if give it quick short throttle rev it, smoke goes away as rpms increase but as soon as you let off throttle you get blue smoke as the rpms decrease back to idle.
Anyway..............any other ideas? I read that blue smoke is normal on cold start but it was'nt doing it when I got it and now it is? Thanks again everyone!!!!!!!!!!!!!
With that said, you may have one or two burned out glow plugs and the cold cylinder/s are simply not firing very well until it warms up a bit.
Item in bold:
Could you define warms up please?
As in the temperature needle rises all the way to the normal operating temperature, or as in the heater just begins to blow some warm air?
Thread Starter
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Junior User
Joined: Aug 2007
Posts: 93
Likes: 1
From: Mound LA.
Well...............It really does'nt take that long for it to quit smoking? It has been in the 80's here and it will quit smoking after a 2-3 minutes or so. It just never did this before and just recently started. That is the main reason for my concern. I just purchased a new multimeter to check the glow plugs and will do that next and post my results for your opinions. Thanks again for all the help as I really ned it!!
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Sounds like you have a burned out glow plug. Happens all the time and is no big deal. The hardest part is getting at them to replace them, they are under the valve cover.
Once you gain access, replacing them is very similar to replacing a spark plug.
Once you gain access, replacing them is very similar to replacing a spark plug.
Senior User
Joined: Sep 2004
Posts: 329
Likes: 0
From: Carroll County, MD
Here is a thought.
Plug in the block heater for a while (overnight) and then try. If the problem goes away, I would guess it is the glow plugs, as the added heat would be like the truck warming up.
Plug in the block heater for a while (overnight) and then try. If the problem goes away, I would guess it is the glow plugs, as the added heat would be like the truck warming up.
Thread Starter
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Junior User
Joined: Aug 2007
Posts: 93
Likes: 1
From: Mound LA.
Ok here is the glow plug readings and 2 other problems I found!
Readings: are all either 0.05 or 0.06 (all good) right?
The GPR is bad as one of the small terminals is twisting insdie when you try to tighten the nut on it and the housing is busted on the outside at that terminal. Will replace it asap.
Now here is another problem I found while testing the glow plugs today.
When I pulled the plug of the passenger side valve cover I notice that there was a burnt looking spot at one the GP terminal holes in the plug. I tested the other 3 GP holes in the plug and got a constent reading but could not get a reading out of the burnt hole at all? I mean nothing! I know I need to replace the plug but was wondering if I can simply cut that plug off and crimp on a new plug or do I have to buy a whole new complete wireing harness? Either way...........point me in the right direction to buy what I need please?? Thanks again everyone!!!!!!!!!!!!
Readings: are all either 0.05 or 0.06 (all good) right?
The GPR is bad as one of the small terminals is twisting insdie when you try to tighten the nut on it and the housing is busted on the outside at that terminal. Will replace it asap.
Now here is another problem I found while testing the glow plugs today.
When I pulled the plug of the passenger side valve cover I notice that there was a burnt looking spot at one the GP terminal holes in the plug. I tested the other 3 GP holes in the plug and got a constent reading but could not get a reading out of the burnt hole at all? I mean nothing! I know I need to replace the plug but was wondering if I can simply cut that plug off and crimp on a new plug or do I have to buy a whole new complete wireing harness? Either way...........point me in the right direction to buy what I need please?? Thanks again everyone!!!!!!!!!!!!
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
My '99.5 burned up a wiring harness like that because the glow plug wire was routed against one of the push rods. It required replacing the wiring harness under the valve cover, both sides. The valve cover gaskets, both sides, and repair the burned plug on the outer half of the engine wiring harness. GRRR. 
Originally Posted by Kwikkordead
Ok, I just completed another repair to my '99 F-550. It started running strangely a few days ago and checked things out and found that the glow plug wire for #6 was shorting out against the push rod!
I took the valve cover off to also discover this: The plug was on crooked!
I removed the right side valve cover to see that the same problem was going to happen there and replaced that side too. See the wire rubbing on the push rod.
The new wiring harnes is routed a little different to make sure that doesn't happen again. Plus I bent them as far away from any moving object as possible.
It wouldn't surprise me if all the '99s with certain production run have this problem.
I took the valve cover off to also discover this: The plug was on crooked!
I removed the right side valve cover to see that the same problem was going to happen there and replaced that side too. See the wire rubbing on the push rod.
The new wiring harnes is routed a little different to make sure that doesn't happen again. Plus I bent them as far away from any moving object as possible.
It wouldn't surprise me if all the '99s with certain production run have this problem.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I never ohm out glow plugs. If I suspect one and the budget is tight, I pull it and jump it with a wire on a battery on the bench. If it passes, it goes back in. If the budget allows, I just install new ones.
To repair the plug on my truck, I had to install a new electrical part inside the housing of the part that plugs into the valve cover gasket. It was a bit tricky because I couldn't find the exact duplicate and had to improvise. What I used did the trick, but I didn't really like it.
To repair the plug on my truck, I had to install a new electrical part inside the housing of the part that plugs into the valve cover gasket. It was a bit tricky because I couldn't find the exact duplicate and had to improvise. What I used did the trick, but I didn't really like it.
Posting Guru
Joined: Nov 2006
Posts: 1,059
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From: Herndon KY
Originally Posted by JDJHNTR
I'm looking for a new outer plug now to replace the bad one? Does the reading I got on the GP's look right? Best I can find is they are within spec?
Thread Starter
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Junior User
Joined: Aug 2007
Posts: 93
Likes: 1
From: Mound LA.
Ok guys..............finally got a new outer valve cover harness plug to replace the one with the burnt connector. Got it installed today and fired it up. Temp was arounf 70* and cranked really easy with no blue smoke! I will hold my fingers and try it in the morning whne the temp is cooler and post back then............
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