My 6.2 runs smoothly but hit the peddle and lots of black smoke - truck is sluggish and accelerates at a snail pace. I have put on a new air filter with some help but not enough. I have advanced the timeing with little effect. I was wondering if I turned down the fuel in the IP if this would solve the situation? I live at high altitude and do not have a turbo. Any help would be appreciated. This can't be normal.
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Can fuel adjustment help this situation?
- Thread starter sdasdona
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corelokt
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Run 2-stroke oil with your diesel.
corelokt
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Oh, and keep a spare fuel filter on hand.
K9Vic
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Make sure it is TC-W3.
baddy3
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Had the similar situation, wife run the truck on poorly filtered WMO while I was on deployment, when I returned home the truck could hardly move . Turned the pump 1/6 and added a quart of old atf to a couple of gallons of diesel to clean the injectors… the improvement is amazing, pulls like a train now…
chevyCUCV
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I think high altitude is the problem.
Yes less fuel should mean less smoke, but do you exclusively drive in high alt?
I would go turbo to help restore performance, but thats costly
Could start cheaply by opening up your air intake some. More air could compensate for the lesser amount of oxygen
Yes less fuel should mean less smoke, but do you exclusively drive in high alt?
I would go turbo to help restore performance, but thats costly
Could start cheaply by opening up your air intake some. More air could compensate for the lesser amount of oxygen
corelokt
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I add 2 ounces w/ every tank. As said ATF also works. It cleans the system. The first couple times it can plug your filter as it loosens crud in the tank and lines. It will also clean the injectors and just as importantly, lubricate your injector pump. Newer diesel does not keep our older pumps lubed.
baddy3
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Search YouTube for: How To Turn Up The Fuel Delivery On A 6.2L Diesel, that will give you precise direction how to do it...
great information! The one thing I wanted to know when you had your problem is did you turn the fuel up or down and then after the ATF did you return it to the original? What i am getting from all this is that the injectors or lines may be clogged and by cleaning them out with ATF the atomizing process goes back to normal and walllah power back and no black smoke? Am I right?
baddy3
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Well, my pump had already been on it’s way out (debris and muck in the return valve). I didn’t want to advance it any further, instead I decided to turn it up, as discussed before on this forum(allegedly that way you compensate for the age of the pump). If the pump is in good condition, I wouldn’t turn it up more than 1/8 and add ATF…. I turned mine for 1/6, anything over that is for engines with a turbo(again, that’s the info from the guys on this forum)…so if you turn it for only 1/8, than no need to turn it back to initial set up….or maybe someone more knowledgeable could fill us in…..
baddy3
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My truck has only 42K, but don't forget it's 27 years old and pump internal rubbery parts tend to harden and crack with age, and may collapse, which will eventually ruin the pump, even on low mileage trucks...yes, i know, not comforting words...