:mad: Has anyone else had a problem with there truck loosing power. Almost like the truck is running on 5-6 cylinders, but idols just fine. I have an 02 Duramax model and my brother has a 01. Both trucks have the same symptoms. Both trucks have the edge w/ attitude. If I let my truck idol for 45 minutes or so you can here the cylinder start misfiring and the pinging noise begins. Almost like the engine is misfiring or out of timming. The fuel filter is new, so that can be ruled out. I have 2 other Threads, but no help yet.

What does it do without the Edge box plugged in?

:mad: Has anyone else had a problem with there truck loosing power. Almost like the truck is running on 5-6 cylinders, but idols just fine. I have an 02 Duramax model and my brother has a 01. Both trucks have the same symptoms. Both trucks have the edge w/ attitude. If I let my truck idol for 45 minutes or so you can here the cylinder start misfiring and the pinging noise begins. Almost like the engine is misfiring or out of timming. The fuel filter is new, so that can be ruled out. I have 2 other Threads, but no help yet.



Are you saying WITH the Edge box plugged in it does this,or stock? :confused:

Any trouble lights??

First eliminate the Edge, see if it is a programmer issue or a truck issue.

If its a programmer issue then deal with Edge. If its a truck issue we should look for trouble codes first.

We could jump to conclusions but we need some more info. Drivabilty is tough without some more information.

:mad: Has anyone else had a problem with there truck loosing power. Almost like the truck is running on 5-6 cylinders, but idols just fine. I have an 02 Duramax model and my brother has a 01. Both trucks have the same symptoms. Both trucks have the edge w/ attitude. If I let my truck idol for 45 minutes or so you can here the cylinder start misfiring and the pinging noise begins. Almost like the engine is misfiring or out of timming. The fuel filter is new, so that can be ruled out. I have 2 other Threads, but no help yet.




Do NOT let your truck idle for 45 minutes!!!!
You are washing down the cylinder walls with raw fuel. It doesn't burn the fuel because it is staying too cool from just idling!!

That is probably why you have no power. It's carbon or soot buildup or something like that. Once you pull it hard for a good while and let er get up to temp good it will gradually get better.
My uncle would always just piddle along with his diesels. Never would run them hard. Then they got to where they were 'lazy'.
Then you gotto work the snot out of them to become normal if they in fact ever do again.

What does it do without the Edge box plugged in?

It does the same thing stock without the Edge. No Service engine light. No codes. It will eventually clear up on its own but it is very aggravating. The truck shimmies and struggles to move. I would like to fix the problem if possible. Your help is very much appreciated.:bow:

Yes, It does the same thing

:badidea: Why would you want to idle your truck for 45 min.?These aren't big rigs.

Change the fuel filter lately? Add any fuel conditioners or Ctane booster?

Houston traffic is so bad at times the truck sits and idles or stop and go traffic at slow speeds. This is when it occurs the most. Sometimes if I do not drive the truck at all for a week or so it really gets bad. I thought it might be water , but when I drain the filter I have not seen any evidence of water

Change the fuel filter lately? Add any fuel conditioners or Ctane booster?

Yes, changed the filter and it did not make any difference. I also use a Lucas fuel conditioner/ injector cleaner.

My truck seems to do the same thing. I don't let it idle for extended periods. It seams to heat up the fuel and cause some sore of vapor lock or something. If I open up the bleed valves and reprime the system it seems to cure the problem. It is a strange deal indeed-

We do not have temps here like in Texas, so this may be temp realated I dont know. We have never experianced any issues with long idle times.

I would look at fuel data on a good scan tool during the symtoms. I find it hard to believe such prenounced drivabilty symtoms make no codes or failure records, but maybe.

This is a hard one to diag without the truck in a service bay, good luck.

Do NOT let your truck idle for 45 minutes!!!!
You are washing down the cylinder walls with raw fuel. It doesn't burn the fuel because it is staying too cool from just idling!!

That is probably why you have no power. It's carbon or soot buildup or something like that. Once you pull it hard for a good while and let er get up to temp good it will gradually get better.
My uncle would always just piddle along with his diesels. Never would run them hard. Then they got to where they were 'lazy'.
Then you gotto work the snot out of them to become normal if they in fact ever do again.

I think Dutch is correct.

I know when I let my truck idle, the coolant temp drops quite a bit and although I have never let it idle for 45 minutes, it makes sense that the combustion temp could actually drop below where it really needs to be to fire, and therefore cause build up raw fuel and soot. This problem would get worse and worse the more you let it idle for extended periods over and over, so as mentioned before, don't.

I would get a good diesel additive and use it in the next few tanks and not let it idle for a while and drive it hard to blow the soot out of it and see if that fixes the problem.

Thanks guys, The next time it happens I will blead the system and re-prime. I will let you know what happens.

Thanks for all your help!!!:ro)

The idling and cylinder wall washing thing is a wive's take from the old days of mechanically injected trucks. I'm not promoting idling, just saying it won't give you that effect. My truck idles a fair amount and I still take it to the track and lay down lots of horsepower.

There is something else wrong with your truck. Get it hooked to a Tech2 and start doing some real diagnostic work. Look for real problems first. Additives aren't the solution.

If you've got air in the fuel system, you would expect some of this type of behavior.

It does the same thing stock without the Edge. No Service engine light. No codes. It will eventually clear up on its own but it is very aggravating. The truck shimmies and struggles to move. I would like to fix the problem if possible. Your help is very much appreciated.:bow:

Make sure the pin connectors on the edge and the engine connectors are straight and not bent or pushed back in the plugg. I have seen the pins push back before and not make connection then is sounds like it isnt running on all cylinders. Just a thought good luck

Good advice.

I agree I belive it is something electrical (computer management) or Fuel related. When I experiance the problem it pings and knocks as if air is in the injector line and needs bleeding. When i shut the truck down for three or four hours, then crank it up it runs good again. Very strange ??

I had the same thing happen to my truck, after about a month of it in and out of the dealer, they found the problem with it, the tech2 did not find it, the diesel tech did, it was a glowplug and a bad glowplug module. hope this helps. good luck

I had the same thing happen to my truck, after about a month of it in and out of the dealer, they found the problem with it, the tech2 did not find it, the diesel tech did, it was a glowplug and a bad glowplug module. hope this helps. good luck


I have noticed here lately that my voltage gage doesn't reflect that the glow plugs stay on as long as they used to. When I first got the truck, during cold cranks (90 deg ambient outside temp) in the morning the voltage gage would stay at 10-12 volts for a few minutes then shot up rapidly to 14 volts. I guess this was the timed cycle. It doesn't do this anymore. Maybe this is definatly a symptom. But why would the symptoms happen while in stop and go traffic or at an idol? I would think the glow plugs are for starting purposes only. Thanks for your help!!

I have noticed here lately that my voltage gage doesn't reflect that the glow plugs stay on as long as they used to. When I first got the truck, during cold cranks (90 deg ambient outside temp) in the morning the voltage gage would stay at 10-12 volts for a few minutes then shot up rapidly to 14 volts. I guess this was the timed cycle. It doesn't do this anymore. Maybe this is definatly a symptom. But why would the symptoms happen while in stop and go traffic or at an idol? I would think the glow plugs are for starting purposes only. Thanks for your help!!

As far as the tech knew, The glowplugs would come on as I was driving, this would cause the truck to lose power. I am not sure why, but, this is what I was told.