Black smoke
Submitted: Thursday, Jun 09, 2005 at 22:08
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SteveA
Hi everyone,
I am at my wits end here, to cut a long story short got injectors done approx 40,000 kms ago, 5000kms ago got advised to mod injector pump hoping this would stop people coming passed me without waving their hands. All of this costing me close enough to $4,000 and NO improvement
Vehicle is 91 turbo 80 series
Anybody out there got any ideas on what could be the problem
Injectors done at Rocklea Injection service and the pump done at Diesel Australia at Springwood
Reply By: Member - RockyOne - Friday, Jun 10, 2005 at 10:03
Friday, Jun 10, 2005 at 10:03
Live in mountain country..Make sure injectors are adjusted for the average altitude you drive..Ea 1000m variation from datum will have an adverse effect..We followed my son's HJ-45 back from Emu Creek Offroad Competition one year.As we crossed over the mountains we saw clouds of black smoke from his rigs exhaust on higher altitudes,yet back
home in the Central Highlands,Qlkd,it hardly smokes at all...My understanding,from my sky-diving days (we have altimeters) is sea level is 14.7psi :-) Rgs RockyOne
AnswerID:
115195
Reply By: Member - Jeff M (WA) - Friday, Jun 10, 2005 at 11:33
Friday, Jun 10, 2005 at 11:33
Just do what I do and flip the little thingy up on the rear view mirror so you can't see it! LMAO!
Mine smokes pretty bad when I lift my foot off the accelerator suddenly after heavy acceleration, I only assume that it's the older type electronic fuel pump/ECU being a little slow in reacting. Never thought much of it myself...
Does your's smoke all the time or only in certain confitions?
Is it an Auto or a Manual. I figure a manual wouldn't do what
mine does as when you lift your foot off the accelerator it still maintains revs, being an auto if I'm not in torque lock and I lift it the rev's drop back to idle and all that fuel the ECU was pooring into the motor has to go somewhere, so it goes out the pipe!
AnswerID:
115223
Reply By: Kiwi Ray - Friday, Jun 10, 2005 at 15:47
Friday, Jun 10, 2005 at 15:47
A
check list for you
Air intake system, free flowing
Exhaust, not restricted
Cam belt worn, late timing
Tappet clearance
Pump timing
Pump internal pressure, ccheck
Pump auto advance,
check
Pump timing
Turbo boost, ceck
Waste
gate,
check
Is this engine a factory turbo model, if so these injectors do not service
well they are better replaced with new.
Is this truck a Used Jap import iif so they had rather small exhausts, change to 2 1/2 - 3 ins they also tend to block the mufflers due to the slow cold running in Japan.
Make certain there are no air leaks between turbo and manifold
Some of these motors had aneroid unit
check that it is working and the hoses are connected
Ray
AnswerID:
115263
Reply By: Big Woody - Friday, Jun 10, 2005 at 23:07
Friday, Jun 10, 2005 at 23:07
Hi Steve,
I had this exact problem on my turbo diesel 75 series. After doing the injectors and the pump it turned out to be a faulty boost compensator on my injector pump.
This boost compensator is fitted to supply more diesel down low in the revs to compensate for lack of turbo boost at those revs. As the revs increase then the boost compensator progressively backs off as the turbo takes over. Basically it eliminates some of the turbo lag.
Anyway that is what
mine turned out to be and I have virtually no black smoke at all now. It was very embarrassing before as no matter how gently I took off, those behind were covered in black smoke. I had to find the problem before the cops put me off the road.
I hope this helps mate.
Cheers,
Brett
AnswerID:
115313
Follow Up By: fisho64 - Tuesday, Jun 14, 2005 at 22:50
Tuesday, Jun 14, 2005 at 22:50
actually it works in the opposite way, less fuel when there is no boost, more boost allows more fuel to be burnt without black smoke (unburnt fuel)
FollowupID:
371387