Black Smoke Upon Acceleration

thomas04 · **Joined:** Sun Feb 28, 2010 1:57 pm **Posts:** 129

I was reading a post when I came across a line mentioning that at no time upon flooring your acceleration pedal should you see black smoke from your exhaust pipe. Funny thing, since the day I have owned this vehicle, 2 years now, black smoke has expelled from my vehicle upon fast acceleration. If this should not happen can someone mention a few points that would help to eliminate this concern? Thanks.

Peace,

S. Smith

Sir Sam · **Posted:** Mon Oct 24, 2011 9:50 pm

Have you cleaned your MAP recently?

thomas04 · **Joined:** Sun Feb 28, 2010 1:57 pm **Posts:** 129

I have cleaned my MAP sensor multiply 3 or 4 times and this has made no noticable difference in the past. Any other ideas?

WolverineFW · **Posted:** Tue Oct 25, 2011 2:50 am

GDE Eco Tune......

bloodmcnally · **Joined:** Wed Sep 08, 2010 10:55 pm **Posts:** 17

i feel ya. i got ecotune. tcm tune.i cleaned map twice. I assisted turbo actuator to make sure of full travel. new fuel filter assembly. air filter.lift pump. new turbo 18k ago and egr replaced twice before i owned it. still friggin smoky!!

naturist · **Posted:** Tue Oct 25, 2011 7:41 am

All that and still smokes? I'd have a look at all the hoses as well as the intercooler for an air leak. I have a 2005 with 138,000 miles on it. I put a Provent on it at 11,000 miles, have replaced hoses (one split) and a GDE eco tune (Just did that, wish I had a long time ago). Until the eco tune it smoked minimally, except after a period of no full throttle, when it would give me a puff of soot before cleaning right up. Now it doesn't even do that. But boy did it smoke when the hose from the turbo to the intercooler split on me.

Oh, and I've never cleaned the MAF.

GreenDieselEngineering · **Joined:** Sun Jun 07, 2009 5:10 pm **Posts:** 1111

bloodmcnally wrote:

i feel ya. i got ecotune. tcm tune.i cleaned map twice. I assisted turbo actuator to make sure of full travel. new fuel filter assembly. air filter.lift pump. new turbo 18k ago and egr replaced twice before i owned it. still friggin smoky!!

How many miles on your CRD? It could be worn injectors, but doubtful as they typically will cause other issues like misfire. After speaking with many CRD owners, the intake manifold clogging with a soot/oil mixture could be a cause for concern. If the manifold is sufficiently choked, it is akin to breathing through a straw. High mileage CRDs that ran for a long time without a tune or SEGR are all prone to this problem, unless the CRD spent its life above 6000 ft altitude. Of course, cleaning the intake is a bear since the intake manifold doubles as the cam carrier and requires the engine to be re-timed if removed. This is about a 5-6 hour job.

Another possibility is your fuel source. Try changing the station or running an additive for a tank or two to see if that has any effect.

papaindigo · **Posted:** Tue Oct 25, 2011 9:04 am

For what it's worth when I got this CRD at 26K it smoked on most any throttle and had a lovely black soot deposit on the rear bumper above the exhaust. Got the GDE EcoTune at 30k and cleaned MAP sensor and bumper stain; no more smoke and after 10k miles still no bumper stain.

Might want to check MAP sensor and run some diesel injector cleaner in your next tank.

dieseldoesit · **Posted:** Tue Oct 25, 2011 10:44 am

GreenDieselEngineering wrote:

If the manifold is sufficiently choked, it is akin to breathing through a straw. High mileage CRDs that ran for a long time without a tune or SEGR are all prone to this problem, unless the CRD spent its life above 6000 ft altitude. Of course, cleaning the intake is a bear since the intake manifold doubles as the cam carrier and requires the engine to be re-timed if removed. This is about a 5-6 hour job.

Are there any additives / solvents or anything similar that can be used to removed the stuff without taking off the intake manifold?

Granahan378 · **Posted:** Tue Oct 25, 2011 11:09 am

Well I just ran a additive called sea foam in the oil and fuel drove around for about 2 hrs and changed the oil, seems to be running much better. I am looking for a diesel shop to run a bg product called isc I think, it's injected into the air intake system to clean the build up. Mainly used on ford 6.0 with all the emission problems pretty similar to our lil jeeps. The service should be about a $150 bucks and than you should run a can of bg44k. Check out bg products on there website and read up. Hope those help, also if you do the oil sea foam trick the exhaust smells terrible and is smokey white but really seems to help, again only run the jeep about 2 hrs wih the stuff in the oil.

Greasey Bob · **Joined:** Tue Dec 14, 2010 3:34 am **Posts:** 228

Needs the ORM and the EHM! Clean the MAF.

NotPicky · **Posted:** Wed Oct 26, 2011 5:36 pm

thomas04 wrote:

I was reading a post when I came across a line mentioning that at no time upon flooring your acceleration pedal should you see black smoke from your exhaust pipe. Funny thing, since the day I have owned this vehicle, 2 years now, black smoke has expelled from my vehicle upon fast acceleration. If this should not happen can someone mention a few points that would help to eliminate this concern? Thanks.

Peace,

S. Smith

When you "floor" it from a dead stop. The vains open up on the turbo, this is what causes that little lag. I've always had smoke when flooring it. No smoke if you easily role into the throttle, because the vains are farther closed to aid in spool up. I wouldn't worry about it. The smokeless diesels didn't really show up till DPFs were introduced.

Black Smoke Upon Acceleration

Who is online