B

BarrieC

Member

• Nov 16, 2017

• #1

Title says it all . I don't seem to have power loss but when towing uphill smoke from exhaust is really bad . What are the common causes please.

 

bankz5152

Well-Known Member

• Nov 16, 2017

• #2

Check your boost hoses/Intercooler for splits

 

sierrafery

Well-Known Member

• Nov 16, 2017

• #3

what dimension tyres?...if they are more than 5% bigger than standard it can be black smoke while towing uphill without any other issues cos the addaptive strategy is mixed up and will overfuel it

 

B

BarrieC

Member

• Nov 16, 2017

• #4

sierrafery said:

what dimension tyres?...if they are more than 5% bigger than standard it can be black smoke while towing uphill without any other issues cos the addaptive strategy is mixed up and will overfuel it

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Tyres 255/55 R 18 ?

 

sierrafery

Well-Known Member

• Nov 16, 2017

• #5

then it's not that, after you made sure there's no boost loss between the turbo and inlet unplug the MAF and drive it so for test

 

B

BarrieC

Member

• Nov 16, 2017

• #6

sierrafery said:

then it's not that, after you made sure there's no boost loss between the turbo and inlet unplug the MAF and drive it so for test

Click to expand...

will do but will have to be tomorrow now , thanks for hints/guidance.

 

N

NFav

Member

• Nov 17, 2017

• #7

Black smoke is over fueling (too much diesel) or lack of air into the cylinders.
So as above, check all the boost pressure hoses are good, and that the intercooler isn't damaged
also check the air filter isn't too dirty or any thing else restricting the air coming into the engine.

 

B

BarrieC

Member

• Nov 18, 2017

• #8

NFav said:

Black smoke is over fueling (too much diesel) or lack of air into the cylinders.
So as above, check all the boost pressure hoses are good, and that the intercooler isn't damaged
also check the air filter isn't too dirty or any thing else restricting the air coming into the engine.

Click to expand...

Hi and thanks , Have 'squeezed' and pulled at the hoses nothing loose and no apparent leakage from them when running and engine revved , air filter not too shabby either certainly changed at last service a few months back.
To eliminate any internal and unseen problems with hoses , new set ordered and will be fitted once arrived. Will report back .

Update 23/11
New boost hoses now fitted , first chance I have had to do job.
the larger hose from intercooler to manifold (1st one I removed) had a secret split underneath it, the little rascal !!! changed out the other two but both those were good .
Truck felt somewhat different on test drive and not too much smoke from rear on hard acceleration. Think this may be it beaten ? my mechanic friend keeps leaning toward the egr being blocked has this opinion any value ?

 

Last edited: Nov 23, 2017

B

BarrieC

Member

• Dec 4, 2017

• #9

Update 23/11
New boost hoses now fitted , first chance I have had to do job.
the larger hose from intercooler to manifold (1st one I removed) had a secret split underneath it, the little rascal !!! changed out the other two but both those were good .
Truck felt somewhat different on test drive and not too much smoke from rear on hard acceleration. Think this may be it beaten ? my mechanic friend keeps leaning toward the egr being blocked has this opinion any value ?

 

sierrafery

Well-Known Member

• Dec 4, 2017

• #10

yes it has, if the EGR is still on clean the MAP sensor too cos that's full of gunk and makes trouble