lack of power on diesel 4x4

[tracey68]

I have been driving round with the passenger seat up and been watching this westgate acuator and it does not seem to be moving at all. I now its supposed to open when the turbo boost exceeds a certain pressure but colud this be the cause of my lack of powe and can i free it up some how. The mech disconected it yesterday and the flap moved but there is no sign of the bar moving. Should you be able to push the bar in and out.

[tracey68]

I also notice that in one of the posts showing the westgate acuator that the pipe is going the some vacum on the chassis . Mine does not do this it goes back onto the turbo and the air flow is travelling from 2 to 1

[tracey68]

Can anybody answer my previous posts

[missfixit70]

I think the posts you're looking at there may well be Berrega's? if so his is a newer bongo with a different fuel pump & turbo setup, so it won't be the same. Responses may well be a bit slow this time of year as peeps are off on hols enjoying their bongos.

[tracey68]

Hi taken middle and rear section of the exhaust off and bongo does perform better but we have cut the exhaust open to have a look if there is any blockages but there was none. Not fitted the new sections on yet but could there be another problem.
Rob

[321Away]

I have been driving round with the passenger seat up and been watching this westgate acuator and it does not seem to be moving at all. I now its supposed to open when the turbo boost exceeds a certain pressure but colud this be the cause of my lack of powe and can i free it up some how. The mech disconected it yesterday and the flap moved but there is no sign of the bar moving. Should you be able to push the bar in and out.

with an old type turbo, the wastegate not operating, should mean increased power, as its the wastegate opening that allows bypass and thus reduction in power. an old type turbo is pressure driven, the vehicle rail newer type is a vacuum driven system that controls the flow of gases over the turbine blades ~(increase) as opposed to allowing it to bypass (decrease). As previously mentioned by umbongocat, and in my experience, the first thing i'd be looking at is the fuel pump, if the engine isnt running properly, the turbo wont spool up, so maybe thats a symptom rather than a cause.

Julian

[Northern Bongolow]

the waste gate rod does move,but only at very high revs,i got mine up to 3500 and it didnt move.in the manual it says a pressure of 112-121 kpa (what ever that is in real money).

have you removed the banjo filter on the pump and checked it, one i saw was clean on the top(inside) but it had a big sticky mess dangling from the inside,a bit like a hairball in the bath tub .

check the pipe between the air intake elbow and the boost compensator on the fuel pump carefully for leaks.

check all the air pipes from the airfilter round to the turbo and beyond.

check the operation and the pipework to the egr system and solenoids,if the egr valve is faulty or sticking, this sends or doesnt send a signal to the ecu.

are there any visible fuel leaks on the fuel pump. (sucking in air).

is the engine oil level high.(fuel leaking from the nose seal on the pump into sump. )
see great pretenders recent thread on adding brake fluid to the fuel to swell the seals in the pump.
to be honest if it runs well but doesnt rev/pull it sounds like the pump/seals to me.

that should keep you quite for a while.
sorry to go over other peeps posts.

edit beaten by julian

[tracey68]

Thanks for that Ady, but did you read my post about the exhaust being removed. I have cleaned the banjo filter and the pipe between the air intake and the pump is ok. The blanking of the egr valve will be next. No fuel leaks.But what about the difference since the exhaust has been removed.
Rob

[Northern Bongolow]

i did read all your posts, but you didnt seem to answer them all fully for me, so i thought a would go over them again
blanking the egr off wont do anything with regard to this in my opinion,its a good idea long term though. its the electrical ecu connexions that i was refering to,and the solenoid controllers and pipework.if the egr solenoid opens and the valve is stuck the message to the ecu will be wrong, or if the vent solenoid is stuck open then the vac will go to atmosphere.
all clutching at straws really, but we need to get you on your hols. .

[tracey68]

Thanks for that what are the benfits of blanking of the egr valve and what do the solenoid do. Also why is there an increase in performance when the exhaust is removed.

[Northern Bongolow]

the advantages of blocking the egr are simple,you will then be burning more fresh cooler air(bigger better bang) it will still easily pass the mot emisions without it.with it connected you are reburning old exhaust fumes and clean air.

the increase you notice in performance is easily explained too.thats why the boy racers fit fat boy exhausts, it just helps the airflow out of the engine,making it breathe easier, but you can go to far as most engines are mapped to take into account the back pressure in a standard exhaust.

now we need to go back to basics, you may not like what im going to say but i mean no offence.
you bought a bongo recently, do you know any of its history in the uk,and who the last owner was. if you do keep the info off here as you may upset someone. you say it has some evidence of work round the turbo area. to me this sounds like they have had a problem,they may or may not have fixed it. im thinking they may not have done, but only you know what deal was made when you bought it. if they havnt fixed it, then the problem may still be there.
i know its hard but try to stand back and weigh up the clues. the diesel is a very primitive beast, and requires little to run, as julian and others have said if the basics are there,ie its running it points to the pump,the turbo is the next option to check, but it sounds like someones already been there, but i would strip and check this has been done right, just for my own peace of mind, and because its cheaper to do.
hope this helps.

[tracey68]

Thanks for that Ady I am clutching at straws now but i wonder if where they worked on the turbo something has fouled up the other side and now that the exhaust has been removed its sorted, wont no until we put the new exhaust on. If you say it could then be the turbo how do we check this as the fitter has done some tests and with the exhaust off you can certainly feel it working. What about the intercooler could that be blocked. Then you mention the pump does that have to be looked at by a diesel specialist or can our mech have a look at if so what can he do.
Rob.

[Northern Bongolow]

again going off the clues of the maybe passed turbo work, if the old turbo failed it could have filled the intercooler with oil or indeed water,this has been known, this would restrict the through airflow to the inlet manifold, and partly strangle the engine. rip it off and clean it out, its an easy job. check all the pipework/connexions while your there.
the pump is a very complex bit of kit, and really needs the right chap,your chap im sure could do the basic checks like is enough fuel is getting to the injectors etc.

[Diplomat]

My wastegate actuator doesn't look like it has ever moved.

Not too worried, though as I never rev it anywhere near 3000 rpm if I can help it.


Frank

[lizard]

Hello peeps long time no post

I have a problem with the EGR pipe that is leaking from the screwed join in the back of the exhaust manifold. It is blowing between the pipe and the large screwed threaded union. This is quite noisy and may be reducing power. I have tried tightening this but there is now way that it will move. This may require a new pipe, I have looked for this pipe on Lush Projects but cannot find it.

Have any of you guys any thoughts on this problem of replacement repair renewal etc.

All the best.