gm '95 6.5 diesel smokes under load.

[wajajaja02]

My 6.5 diesel only smokes when over 2k rpm and under load. other wise runs great, 22 mpg on the highway, good power. Didnt know that I should of tested it with the parking break on. now what.

Both batteries have gone bad, now too. will replace tomorrow. one has a dead short.

 

[Bob_VT]

Re: gm '95 6.5 diesel smokes under load.

How's the air filter??? Clean? I would run a shot or two of injector cleaner through it too...... I used to use ATF to clean my injectors.

 

[wajajaja02]

Re: gm '95 6.5 diesel smokes under load.

air new, and I ran a pint of sea foam in 20 gallons of diesel fuel on a 300 mile run down the coast from boston when I bought it two months ago.

 

[gss036]

Re: gm '95 6.5 diesel smokes under load.

You need a stronger mix to really clean an injector.

 

[puddle jumper]

Re: gm '95 6.5 diesel smokes under load.

What color is the smoke. White is coolant,blue is oil and black is fuel.

 

[wajajaja02]

Re: gm '95 6.5 diesel smokes under load.

hi, blows black smoke, but only when exceeding 2k rpm, with the trans and parking brake engaged, or pulling my boat. GM put a vacuum gauge gizmo on the breather hose from the air filter to the turbo, to indicate when the air filter need change, its green.
Strange that the two batteries went bad together after the first tow of the boat and this trouble became evident. bought two new batteries today, will install tomorrow.

 

[puddle jumper]

Re: gm '95 6.5 diesel smokes under load.

Not knowing GM that well but when they installed the air filter tell tail,they didn't leave anything unplugged did they. It sounds like an map or mass air flow sensor unplugged.

As of for the dead battery's if the charging system not working that might play a roll in the drivabillity problem.

 

[dolluper]

Re: gm '95 6.5 diesel smokes under load.

Injector pump a little rich ....or pump timming off

 

[Bob_VT]

Re: gm '95 6.5 diesel smokes under load.

How many miles on the rig? could just be getting old....................

 

[windsors03cobra]

Re: gm '95 6.5 diesel smokes under load.

Certainly not excessive fuel consumption if its getting 22mpg on the HWY.
Blowing a light haze is what diesels do when you load them.

You wanna see black smoke ? Check out some of the high performance diesels rolling coal, pure soot particulate coming out those exhausts. NASTY !

 

[wajajaja02]

Re: gm '95 6.5 diesel smokes under load.

my mechanic cleaned up the turbo, and today it ran much cleaner. still smoked a bit, more as it heated up. the hill i have to go up is a 800 ft climb altitude and a mile long, either way north or south out of town.
He feels I don t run it under load often enough to keep it "healthy"