Loss Of Power - Incurable?

[Guest Attila]

I have a

[johnb80]

My Cosworth Granada was very much like this when the valve timing was out. I don't know how easy it would be to check on the Gal but it must be worth a look.

 

Regards - John

[Guest MATT]

it might be worth checking the MAF. the MAF (MASS AIRFLOW SENSOR) is found in the air intake. find the air filter, the tube that comes from that might have a small unit with wires coming from it, i enclose a picture of my corsa - similar thing.

http://mysite.wanadoo-members.co.uk/mjcbweb/images/DCP_1034.jpg

 

to try it, simply unplug it, go for a drive, and if theres no difference - its the maf.

 

as i say, may as well try it - wont cost you anything.

[seatkid]

I'm confused...he said he changed the airflow meter... what is this? the MAF sensor?

 

BUT has he changed the air filter? - i.e. try the simple things first......

 

THEN change the MAF sensor

[shelbournes]

I can sympathise with you I am going through the same problems

 

I have had all the above changed

the maf sensor is on side of the air filter on the left hand side of your

bonnet

it has a longer flat multi plug plugged into it ...

I have had this changed too on my car ...but this has made little or no difference

 

I have actually spent

[Guest Attila]

Thanks a lot John for your tip. It helped to make up my mind since it seems to check up with the mechanic

[Guest Attila]

Hi Matt,

 

There might be something wrong with the MAF sensor since the reading from the garageshows that the signal is OK from 3800RPM but before that there is some oscillation.

Indeed I have problem with torque till around 3800, from than on the car seems to operate more acceptably. All in all I

[seatkid]

Why on earth would the valve timing have changed? Only if someone changed the chain (have they?) and put it back wrong, then the running would obviously be lousy and the engine wouldn't last very long without damage......

 

What was this fuel pressure problem thats been resolved?

 

Has it been in a for a proper Ford diagnostic? and an emission check?

With massive lack of power and heavy fuel consumption, these would pick something up.

 

Has it had a proper service (air filter, plugs etc)?

 

Are you using the correct engine oil? Ford engines are VERY sensitive - sticky valve syndrome? A compression check should be dead easy for any garage to do (with the correct tool) and would eliminate burnt /sticky valves straight away.

 

Have you checked all the vacuum piping for leaks?

 

What mileage is this engine anyway and did you buy in this condition?

 

Did you change the MAF sensor? (for a genuine new one?)

 

Was the lambda sensor changed for a genuine Ford one? (not a "universal" one)

[Guest Attila]

Hi Seatkid,

 

Yes, air filter has been changed when I changed engine oil not long after I bought the car since everyone suggested that these are the first things you have to do when you buy a second hand car.

But to answer to you first question, I

[Guest Attila]

Seatkid,

 

You do have a comprehensive check list I appreciate that. So let

[johnb80]

Why on earth would the valve timing have changed? Only if someone changed the chain (have they?) and put it back wrong, then the running would obviously be lousy and the engine wouldn't last very long without damage......

I don't know the mechanical layout on the 2 litre,I offerred the suggestion because on my 2.9 24v Cosworth the chain guide had worn and the chain had stretched a little. The result was the exhaust cam jumped 2 teeth. The engine ran ok and revved freely but the 0-60 time was awful as was the fuel consumption. The engine just felt lifeless and had done only 45,000 miles. It's a long tail of woe with mis-diagnosys every time until a technician from Cosworth was called in by the ford Dealer. He confirmed my guess from 4 weeks earlier that the valve timing was out. The Ford dealer had cost me over

[johnb80]

EGR has been checked and cleaned

When you say it has been checked and cleaned, how was it checked?

 

Try diconnecting the vacuum pipes and blocking them temporarily and see if it makes a difference. It's important that this valve works correctly, if it's open when it shouldn't be performance will suffer, it effectively reduces cylinder capacity.

 

Regards - John

[Ivor_E_Tower]

After that in another garage lambda sensor changed to a universal one, very slight improvement.

We've been here before - I think the non-genuine Lambda sensor is the problem.

[johnb80]

You didn't read all the posts, a genuine Ford one has been fitted.

 

Regards - JB

[Ivor_E_Tower]

Ooops

I hang my head in shame. Missed that bit when I read through. So, any ideas now?

[johnb80]

I was sort of hoping you'd have more ideas ;)

 

My favoured ones are still EGR or Valve timing in that order.

 

Regards - JB

[Guest Attila]

Next things will be checking the timing chain and a compressor check in this sequence as the mechanic says the first is the smaller job since it

[seatkid]

My opinion is....

 

There is no MAP (Manifold Absolute Pressure) sensor on a Galaxy 2.0l Petrol engine! - They are only fitted to (Ford) diesel engines!

 

The MAF (Mass Air Flow) sensor controls the correct fuel-air ratio. A faulty MAF leads to severe loss of mid to high end power. It is important to replace the MAF with the correct type (there are many different models even if they look the same...)

 

Looks as if Hungarian dealers are no better than UK dealers....

 

You didn't say what this fuel pressure problem was....

[Guest MATT]

Hi Matt,

 

There might be something wrong with the MAF sensor since the reading from the garageshows that the signal is OK from 3800RPM but before that there is some oscillation.

Indeed I have problem with torque till around 3800, from than on the car seems to operate more acceptably. All in all I

[Guest Attila]

Your opinion about the MAP weakened my confidence in the Ford dealer :( . It seems to be a weak spot in his story.

The fuel pressure problem was that on the road fuel pressure was half of what it should be. This problem has been eliminated though I don

[Guest Attila]

 

I failed to remove the plug from the MAF (couldn't remove the clip), so this question is pending for a while. :(

[Big Jim's Lad]

Hi,

I have a similiar MPG and lack of power and also always thought it was just the way it is. But when I was checking the oil at the weekend i decided to pull the MAF lead off and see what happens. Now am I right in thinking that the idle revs would change when the MAF is unplugged while the engine is running, as mine didnt do anything, it seemed to completely ignore repeated plugging on and off of the connector. :huh: . I cant do anymore diagnostics just yet as Gal has unfortunately gone to ford for cam chain noise solution, I think its the guide/tensioner. Any idea what this is likely to cost? And where can I get a cheap MAF solution? :huh:

[Guest Attila]

Power problem seems to be solved (huge relief) :lol:

I picked up the Gal from the garage last Saturday and to my surprise, it accelerates normally at low rpms as well.

The intake manifold sealing was replaced plus the plugs were replaced. Garage is not sure which one was the cause, since the car was not tested on the road after changing the plugs. According to the garage both were in good condition but still the replacement made a big difference.

I hope it solved the low MPG problem, though that needs to be tested yet.

 

Nevertheless I

[Guest Attila]

Hi,

I have a similiar MPG and lack of power and also always thought it was just the way it is. But when I was checking the oil at the weekend i decided to pull the MAF lead off and see what happens. Now am I right in thinking that the idle revs would change when the MAF is unplugged while the engine is running, as mine didnt do anything, it seemed to completely ignore repeated plugging on and off of the connector. :lol: . I cant do anymore diagnostics just yet as Gal has unfortunately gone to ford for cam chain noise solution, I think its the guide/tensioner. Any idea what this is likely to cost? And where can I get a cheap MAF solution? :lol:

I read in this forum that someone pulled the MAF lead off, and the acceleration was better than with the lead on, but I didn't try it myself especially that the car seems to be OK.

Have no idea about cam chain noise problem.

MAF replacement: here in Hungary originalFord part was quoted for 90Ł from a Ford dealer. I expect you should get it around this price in the UK. Though it seems to me that it was sold on on ebay, significantly cheaper.