Loss Of Power

[Guest nelse]

Just driving back from a day out, car fine as i accelerate up a slip road, change up and suddenly experience a drop in power, cant get the car above 60-70mph, manage to limp home with very little power and acceleration, engine revs ok without any load seems like turbo isnt cutting in,

 

had the belt changed on wednesday as the car was just about to go through 40,000 miles, not sure if the problem could be related to something going wrong related to this work, belt or hose or something but it has been fine in the 100 or so miles done since.

 

over to you folks for any ideas before i start to cough up some money to find out the exact nature of the problem, hopefully it will be covered under my extended warrently.

 

nelse.

[dipsomaniac]

seems a bit of a coincidence. have a look to see if the MAF has been reconnected. If it has, and you can't see anything obvious, i would give the people who changed the belt a call and ask them to check over their work.

[mumof4]

for free of course.as they have loosened or not reconnected something as dipso said maybe they havent reconnected the MAF.

 

Mind, if the MAF hadnt of been reconnected, you would have noticed the difference straight away not a couple of days later?...unless the MAF has suddenly gone poof and given up the ghost?

 

I think the hoses/pipes etc for the turbo need looking at to make sure they all ok and connected.

[dipsomaniac]

definately FOC. Mo4, i was thinking that maybe the car had only been driven locally and maybe not noticed the loss of power initially.

[mumof4]

He did say he was driving when the power just went.....so maybe not MAF as that is gradual though when it goes you cant get above 70.Could be turbo, but my guess is that because it happened so quick after being seen to that maybe something wasnt reconnected properly?or something disturbed?..Or maybe just something else went poof.Only 40k miles though...bit early for MAF, best bet is to check the hoses for the turbo i think.see if one has come loose etc...im no mechanical genius but i would check for any disconnections /leaks/etc..

 

He changed up then power went...Hmmm...thinking on this for a bit.

[tiny]

Is the induction noise different with the engine under load?

 

It sounds similar to an intake pipe being off the intercoler or turbo. Of course if these pipes were off the induction noises would be much louder. They may not sound much different without the engine under load though.

 

Check the piping from the airbox to the intercooler and turbo, should be immediately apparent if theres one off.

[Guest nelse]

Thanks for the suggestions, will be calling the garage that did the belt change tomorrow, but as way of an update, restarted the car the following morning and everything seemed fine, took it for a run and got it up to over 100mph and tried accelerating from 60 a few times and while still seeming a little sluggish (may have just been a perception though) was much better.

Reading through the technical section it seems like it may have been a problem with the vaccumn causing the turbo to be shut down by the ecu, which apparently resets on restarting the engine. been fine today as well, so will get work checked out to see if something they didnt connect properly may be the cause of the problem, and get it checked for error codes at the same time, and if nothing untoward comes to light just have to keep an eye on things,

 

thanks again for all replies

 

nelse

[tim-spam]

I bet the fault code will be, "charge pressure - positive deviation - intermittant", or something very similar. This will have been caused by the turbo vanes sticking. If it has only happened once and doesn't recur, don't worry. If it starts happening more often, you may need to clean the VNT mechanism on the turbo - there are some other excellent threads on this problem.

[davgree]

seems a bit of a coincidence. have a look to see if the MAF has been reconnected. If it has, and you can't see anything obvious, i would give the people who changed the belt a call and ask them to check over their work.

 

 

Hi , I have the same problem on 54 plate 115 zetec auto, if I turn ignition off and back on, problem goes, but soon comes back, deff electronic prob, not fuel supply. Can someone please tell me what MAF stand for?, also is there a dummies guied to shorcut letters meanings in this forum ? ( eg. MAF = )

 

Many thanks,

 

Dave.

[sanjsanj]

seems a bit of a coincidence. have a look to see if the MAF has been reconnected. If it has, and you can't see anything obvious, i would give the people who changed the belt a call and ask them to check over their work.

Hi , I have the same problem on 54 plate 115 zetec auto, if I turn ignition off and back on, problem goes, but soon comes back, deff electronic prob, not fuel supply. Can someone please tell me what MAF stand for?, also is there a dummies guied to shorcut letters meanings in this forum ? ( eg. MAF = )

 

Many thanks,

Dave.

 

Hi there Dave, welcome to the forum.

I dont know what MAF exactly stands for, but it is also known as the Air Flow Sensor. It simply measures and tells the ecu how much air is going through to the engine. It is located just after the Air Filter box, you should see a wire coming out of it.

Click on this and look for Changing the MAF - with pictures. Look at the pictures on this post.

 

However, because your problem resolves after restarting, it is unlikey that the MAF is faulty....sit tight and someone with more knowledge in this topic area should come to the rescue!

[mumof4]

M=Mass

A=Air

F=flow

 

Dont think your problem is your MAF Dave,

 

Welcome to the club!

[davgree]

Thanks mumof4,

 

MAF !

 

That makes sence now, they always say the clue is in the question!

 

No, I dont think mine is a MAF problem, I will try and get plugged into main dealer computer today.

[davgree]

No, I dont think mine is a MAF problem, I will try and get plugged into main dealer computer today.

 

 

Could not get into Ford main dealer, local garage scanner found the following 2 errors loged:

 

17965 Turbo pressure control valve - pressure exceeded

 

P1557 Intermittent.

 

Anybody know what error P1557 is please, local Garage could not find out, also anybody know anything about the turbo control valve?

 

Many thanks.

[Smilge]

Hi Dave ...... you need to speak to Tim_Spam on this one as he's done a lot of research and helped me out when I had a similar problem. Have a looky here, these might help:

 

http://www.fordgalaxy.org.uk/ford/index.ph...l=n75&st=15

 

http://www.fordgalaxy.org.uk/ford/index.ph...5920&hl=n75

[tim-spam]

Your error codes mean that the VNT mechanism is sticking - the 'intermittent' part simply means that it is not overboosting when the codes are being read.

 

If it only happens once in a while (particularly when the engine is cold?), you do not really need to take any immediate action - when it happens, simply lift off the accelerator and key off and on again and normal service will be resumed.

 

If the problem gets worse, you will need to clean the VNT mechanism to allow it to move freely again. There is a very good posting on this that was started by dt1. By the way, the dealers fix this by replacing the whole turbo.

 

There is a small chance that there is a blockage in the boost control vacuum hoses, or a problem with the N75 valve (boost control solenoid), but these problems usually cause a negative deviation fault code (under-boosting).

[Jonny75]

I have had this problem for ages and finally managed to get to the btm of it but it took alot of Saturday mornings at a friends Garage . I was getting intermittant boost and never full power, turn off ignition back on and away i went until it happened again. Usually only happened in 4th or 5th.

 

On my Galaxy the turbo wastegate wan't functioning fully, was eitherr only 80% close or open cant remember. These are prone to sticking too, Lubed it up with a bit of WD through vacum pipe and manually moved the vane rod.

 

I also replaced all vacum hoses. Some were quite brittle, well worth doing as a small pin hole can cause the same symptoms.

 

If the boost control valve is sticky lube it again. U can check this by pulling off the vacun hose and suck u should hear the valve move inside.

 

Brake servo hose can get brittle and cause a loss of vacum. Mine was broken right at the servo just feel around it for any shap edges.

 

Do you have any fault codes? I was getting a MAP fault Manifold Air Pressure, was told it might be the ECU (didn't want to pay for that) but the faulty wastegate causes the same fault code.

 

Hope this helps

 

My Galaxy now pulls like a train, never been so good Its a '98 TDI 110BHP

[davgree]

Your error codes mean that the VNT mechanism is sticking - the 'intermittent' part simply means that it is not overboosting when the codes are being read.

 

If it only happens once in a while (particularly when the engine is cold?), you do not really need to take any immediate action - when it happens, simply lift off the accelerator and key off and on again and normal service will be resumed.

 

If the problem gets worse, you will need to clean the VNT mechanism to allow it to move freely again. There is a very good posting on this that was started by dt1. By the way, the dealers fix this by replacing the whole turbo.

 

There is a small chance that there is a blockage in the boost control vacuum hoses, or a problem with the N75 valve (boost control solenoid), but these problems usually cause a negative deviation fault code (under-boosting).

 

 

Thanks for everyones help on this problem.

 

After changing the one of the two N75 valves, car still triping into limp home mode. Was going to get a second N75, but yesterday I found the problem! Look at the pics then read some more!

 

There is 3 hose connections, one black and two white ones, the 2 white ones are vacuum and out, whilst the valve sucks air in from the black connector, follow that hose and it leads to a small plastic and paper filter located by the off side susspesion strut area just in front off the bulkhead, pull the filter off and problem is eliminated!!

 

Anyone else who gets this problem - Just take the filter off and run it for a while, must be the easyist / cheapest first test!!

 

WV filter part number: 702 129965 MF5 Forget Ford dealers, they cant trace this WV part number.

Also, if anyone needs an N75 Valve, shop at VW dealer rather than Ford, VW price

[robertf]

Just driving back from a day out, car fine as i accelerate up a slip road, change up and suddenly experience a drop in power, cant get the car above 60-70mph, manage to limp home with very little power and acceleration, engine revs ok without any load seems like turbo isnt cutting in,

 

had the belt changed on wednesday as the car was just about to go through 40,000 miles, not sure if the problem could be related to something going wrong related to this work, belt or hose or something but it has been fine in the 100 or so miles done since.

 

over to you folks for any ideas before i start to cough up some money to find out the exact nature of the problem, hopefully it will be covered under my extended warrently.

 

nelse.