Bluish Smoke Starting From Cold And Knocking Below 2000Rpm

[Awebb180]

Get a garage to run a diagnostic check on the injectors, get the flow rates tested and they will be able to tell you if they are out of spec. They need to be at a certain temperature to be able to get the correct measurements.

alex

[JAPCAR]

Japcar what do you think of techstream mate?

Techstream is Toyota dealer program. You can see the demo :

https://techinfo.toyota.com/techInfoPortal/staticcontent/en/techinfo/html/prelogin/docs/ts/tsUserDemo.htm

Click on Menu or arrow...The program is installed on Toyota tester but I use laptop and Chinese cable/adapter Mini VCI to connect to diagnostic socket.

http://www.ebay.co.uk/sch/i.html?_trksid=p3984.m570.l1313.TR1.TRC0.A0.Xmini+VCI&_nkw=mini+VCI&_sacat=0&_from=R40

[waqar_lionheart]

Mine is exactly the same. Will you please keep us in the loop as I also think one of my injectors is leaking or bunged up or messed up in some other way. I can also make it go away by pressing the gas pedal harder. It would be very nice to find a cure.

Regards,

Waqar

[waqar_lionheart]

Just wondering if you had it checked yet.

regards,

Waqar

[JAPCAR]

Just wondering if you had it checked yet.

regards,

Waqar

No, not yet. I can't go to garage now...

[avensis06]

Well,

I got my engine light back on again when my car went in for service. However i have put a bottle of Comma D-Tox in it and had no lights for last 100 or so miles. was noticing it was returning better performance at low revs also and not knocking as much. had whole family in it today(wife and 3 boys and it was knocking it pants off under load and lumpy as heck below 2000. No probs on mway cruising and it shifts if you give it the beans! Im hoping this knocking will subside as the treatment goes thro. I noticed when i gunned it tonight away from lights up hill there was a cloud of smoke. I'm hoping it is starting to cough out its crud. I'm thinking that sitting at 70 in 6th gear is not going to give it much of a push thro? any input would be greatly appreciated.

Many thanks,

Paul

[waqar_lionheart]

Paul,

I am in a similar boat except my boat is a 2001 1.8vvti gs. Its pretty good but under load it knocks a little bit but I can make that go away by pressing on the gas pedal a bit more. This returns poor economy but keeps the engine safe. I am currently invesitgating this as I am not a big fan of things doing what they are not supposed to do :). I have a few ideas. There is a little puddle of oil (well fluid) next to my injector 3 and 4 counting from driver side. This is making me think that either my injectors have an air leak i.e. bad seals on the outside OR I have blocked injectors. I am also thinking to replace my fuel filter as even though my car came with TOYOTA service history up until last 5k as i do not trust that it had been done. I had recently installed new spark plugs around 2000 miles ago and I am going to take one out and see if it is white (which I am guessing it would be since its pinking/pinging). This would suggest that I have more air and less fuel. To fix this I need to find my air leak or find my blocked or faulty injector. One more thing. I think I also have a very tiny exhaust manifold leak as when i give it the beans, it stinks a bit. This can not be bad cat as these generally are only smelly to cars behind me. I am thinking its a bad manifold gasket. We will see:). Lets keep everyone in the loop.

Regards,
Waqar

[avensis06]

Good luck Waqar.

[+robster+]

look

you cant always fix your car over the internet especially when theres ideas getting thrown around like hot air from egr gives better mpg. and blue smoke only means burning oil.

get your service done and let someone actually look at your car as there is lots of possible trees of faultfinding to go down.

i regularly see blue/white smoke from diesel fuel starvation when i attend call outs so get yer service done to rule out the filter but saying that there is other fuel starvation or air leaks that the service monkeys wont know about or be bothered about.

this engine as you know is prone to hg fault so accept the seller got rid cause he got nervous of this and due to missing last 2 services wont be accepted under Toyotas extended warranty.

any cross contamination or loss of fluids outwith tolerance?

egr as you are attempting but manifold and air shutter valve will be coked up too.

valve stem seals may be gone due to valve coking/scoring/guide wear resulting in worn seals (this will usually clear when warming up)

piston rings will burn oil constant and you will ( or the guy driving behind you) smell the burning oil.

turbo problems?leaking oil or under or overboosting the latter causing fault codes and altering fuel injection parameters if timing advanced will knock.

i personally cant be messed with egr or pcv etc as its inbuilt for type approval emission but not legally reqd after car is sold as long as car meets or exceeds the smoke test.

i personally blanked off my egr after cleaning it as its a manky foookin thing that causes exhaust mixed with oil from breather to really poison a diesel engine and its oil.

i could waffle on but will finish with my 2 cents

i have the p0400 constantly due to blanking off my egr

the ecu has sensed something amiss but i can live with the light until mot when ill erase the code or even disconnect the Battery for 30 mins to turn the light off which will last for about 50miles until the default ecu after reset has calculated things over a period to bring back my code lol....

you have the p0400 code egr flow fault and another code relating to turbo pressure

id stick with faultfinding egr not only for visible muck but electrical operation

egr and turbo are related as inlet and exhaust are bridged via egr

sluggish to open egr will dump boost through exhaust and blah blah blah sorry im drunk and going to bed

[JAPCAR]

robster, would you give some details about knocking...

I mean:

"turbo problems?leaking oil or under or overboosting the latter
causing fault codes and altering fuel injection parameters if timing
advanced will knock."

[avensis06]

i have no codes since cleaning egr and putting comma detox in it. still get the knocking tho. going to go to a local injector specialist who's been in the game 55 yrs - well so his company states

[JAPCAR]

avensis06 as I mentioned I am at the same situation- everything's OK except knocking at low revs. So, let us know what local specialist opinion.

[waqar_lionheart]

have you heard anything avensis 06?

let us know.

Regards,

Waqar

[t-spiritpete]

Most diesel engines will knock if you are in a too high gear especially between 1000& 2000rpm when the engine isn't fully warmed up and even when at full temp you can make it knock if you put the engine under enough load. If the knock isn't in time with the engine revs if you catch my meaning and more of a slower knock then an injector may be at fault BUT it's very hard if not impossible to fault find an engine noise on a forum.

Pete.

[waqar_lionheart]

Hi t-spiritpete,

I was hoping somebody senior will come along :).

I have a petrol engine which has a slight noise when accelerating up a hill or under load up a hill that it will make this pinking/pinging noise (as if marbles in a bowl). Its an avensis 2001 1.8 gs vvti (non oil burner so far). dont laugh. it is. :).

I have done every thing. Tried to find an air leak. Nothing. Only got smoke test left. As spraying stuff around hasnt worked. just had two o2 pre cat sensors (denso and NGK) fitted so after like 8 years the MIL due to O2 sensors went out. FINALLY.

I dont think its an injector issue as that would be ever so present. I have yet to change my fuel filter as i think its an original. car has done 97100.

I am thinking ECU but WHAT THE @ECK AND WHY THE @ECK????

Thinking of giving my maf a good clean.

I also think that I have a weak alternator (would that cause this issue may be?). It slightly dims the lights when I press brakes also on idle with bass the dash lights tend to (you gotta look closely) mimic equaliser lights on a an amplifier display.

Kinda stumped here.

Any help would be greatly appreciated.

Regards,

Waqar

p.s: I have no engine lights on.

[JAPCAR]

Most diesel engines will knock if you are in a too high gear especially between 1000& 2000rpm when the engine isn't fully warmed up and even when at full temp you can make it knock if you put the engine under enough load. If the knock isn't in time with the engine revs if you catch my meaning and more of a slower knock then an injector may be at fault BUT it's very hard if not impossible to fault find an engine noise on a forum.

Pete.

As I said my engine knocking is at 1000-1400 revs under load (1-2-3 gear) but not always...when is OK, I can't make it knocking. Yes when the engine is still cold knocking is more noticeable.

I don't know if it's possible injection timing to be wrong at some conditions or one or more injectors to over fueling from time to time. It's true it is my first diesel but I don't thing it is normal...for most diesels.

[JAPCAR]

Hi t-spiritpete,

I was hoping somebody senior will come along :).

I have a petrol engine .....

Sorry, this topic is for diesel engines and I think it's better to open another similar topic just for petrol engines (if you want), because there is nothing common between both engines...

[avensis06]

Got call from Diesel specialist today. injector 3 goosed. ordering a new denso one for tomorrow. £590 inc vat fitted. They recon there is a new rocker cover on it and main dealer probably quoted prev owner for 4 injectors so probably got shot. if this fixes I'll be keeping for a few yrs to get my moneys worth.

[JAPCAR]

Got call from Diesel specialist today. injector 3 goosed. ordering a new denso one for tomorrow. £590 inc vat fitted. They recon there is a new rocker cover on it and main dealer probably quoted prev owner for 4 injectors so probably got shot. if this fixes I'll be keeping for a few yrs to get my moneys worth.

In my posts 17 and 24 I got hypothesis about faulty injector(s) but wasn't sure...

Please let us know if knocking cured completely after injector replaced.

BTW how much is just injector (without labour)? How much would be all injectors fitted?

[avensis06]

got car back today. No white smoke starting and ran great with no knocking for 2mins! then on dual carraigeway eml on and vback to knocking . I have not had a light for 2 weeks. 600 sovs for what????

The code is now a P0400 again. Not had that since i cleaned it 3 wks ago.

I'll have to phone the specialists with 60 yrs experience tomorrow to get it back in.

[avensis06]

They say they had the manifold off, wonder if they disturbed anything?

[avensis06]

_{Spoke specialist this morning and he feels that the egr is still a bit sticky}

[JAPCAR]

_{Spoke specialist this morning and he feels that the egr is still a bit sticky}

I think EGR could be responsible for lamp on and error codes but don.t know if is connected with knocking. As you describe in your case there is relation lamp (errors)- knocking.

I never had lamp on or codes just knocking. I cleaned twice EGR, even eliminated it (just for try) by putting thin aluminum membrane over the EGR gasket, but no difference- sometimes got sometimes no knocking. When eliminated EGR I thought I got EGR error code bud hadn't, no difference ...my opinion.

Otherwise in my experiment I blocked gases go trough EGR but plunger and it's control still worked, that's why probably no errors. In your case if EGR plunger blocked (or hard moving) in open position I think is possible to get error code and knocking.

Anyway let specialist say...

[avensis06]

I had a good long talk with him, and he explained that the the ecu measure the flow of gases that should correlate with the current position of the valve via (where the dc motor on the valve sets it to). he also mentioned, when engine is cold it is held shut to stop possible rough running. this defo checks out, cus when all five of us went out in car tonight it ran sweet as a nut for first 5 mins then it stared to get a bit worse( no where as bad as pre injector change). So from what he says i believe the valve is not traveling as freely as it can when it opens and closes completely. So EGR off again this weekend and a real good cleaning. was thinking of getting carb cleaner as it is much cheaper than the 150ml wynns stuff i used last time.

take care folks,

Paul

[JAPCAR]

Hi avensis06,

What happened after your last post here? Is your car OK now?