Strange engine behaviour

[The Spanish]

Ok. I have had this problem for a long time. But I think is just not one thing.

Engine behaves a little bit strange, the problem is that not always.

Things that happen:
1. I han hear a buzz noise from the right side of the car in the back. Only when I am accelerating from stand still very gently. After trying to figure it out for some time I have noticed it is only when fuel tank is low, so I think it is the fuel pump.

2. Sometimes I have idle problems. Specially when I enter the city after a motorway run. It will happen for around 5 minutes. When I stop revs drop to around 300 rpm, sometimes it even stalls.

3. Power delivery is not very good. When I accelerate hard, around 3500 rpm I feel as I don't have all the power there. The sensation is as the overboost protection was going to engage. I dit fit the Samcos and IC O-ring mode and since then I have not had any overboost protection kicking in, but I still feel the power is not there. The stange thing is that somedays the power IS THERE and the car really flyes.

Please some suggestions.

I am going to start the engine rebuild now as I have all the bits so this is going in (RS2 IC already in) If I need to change something else this is the time.

- RS2 IM, Turbo, EM, Cams, Injectors, Fuel preassure regulator
- Marco's Downpipe and a new Lambda I ordered (std)
- Oil pump, Water pump, Timing belt (Std)
- Fuel pump (Std)

Could the MAF be my problem? I am not changing it

I thought all my engine problems where cause by and air leak, but now the Samcos are in, the engine is running better, but not perfect.

Regards and sorry for the long post ,

Rafael

[The Spanish]

Ok. I have had this problem for a long time. But I think is just not one thing.

Engine behaves a little bit strange, the problem is that not always.

Things that happen:
1. I han hear a buzz noise from the right side of the car in the back. Only when I am accelerating from stand still very gently. After trying to figure it out for some time I have noticed it is only when fuel tank is low, so I think it is the fuel pump.

2. Sometimes I have idle problems. Specially when I enter the city after a motorway run. It will happen for around 5 minutes. When I stop revs drop to around 300 rpm, sometimes it even stalls.

3. Power delivery is not very good. When I accelerate hard, around 3500 rpm I feel as I don't have all the power there. The sensation is as the overboost protection was going to engage. I dit fit the Samcos and IC O-ring mode and since then I have not had any overboost protection kicking in, but I still feel the power is not there. The stange thing is that somedays the power IS THERE and the car really flyes.

Please some suggestions.

I am going to start the engine rebuild now as I have all the bits so this is going in (RS2 IC already in) If I need to change something else this is the time.

- RS2 IM, Turbo, EM, Cams, Injectors, Fuel preassure regulator
- Marco's Downpipe and a new Lambda I ordered (std)
- Oil pump, Water pump, Timing belt (Std)
- Fuel pump (Std)

Could the MAF be my problem? I am not changing it

I thought all my engine problems where cause by and air leak, but now the Samcos are in, the engine is running better, but not perfect.

Regards and sorry for the long post ,

Rafael

Oh! I forgot.

I think the fuel consumption has gone up also.
Without trashing it and in a combined drive. 70% open road, 30% city I get around 18 litres per 100 Km that works out around 15 mpg without excesive abuse (No "Driving miss Daisy" style either )

Cheers,
Rafael

[The Spanish]

No suggestions?

[newsh]

I have that noise from the back when the tank is nearly empty, I figured it was vacuum in the tank, not sure if its supposed to be like that or not actually. When I open the filler cap the air rushes in "squoosh"..
You may find things are better when you fit the new fuel pump, do the filter too while you're at it. Both of my cars have been absolutely transformed with new pumps and filters. I'd recommend the Motorsport pump if you're going up to RS2 spec.
Another thing worth checking is the MAF connector, carefully clean the contacts and apply a little silicon grease. Make sure the contacts are actually contacting (if you see what I mean) Someone here posted about squeezing the female contacts closed a little with a tiny screwdriver, be careful though as you could easily damage the contact.
HTH

[The Spanish]

I have that noise from the back when the tank is nearly empty, I figured it was vacuum in the tank, not sure if its supposed to be like that or not actually. When I open the filler cap the air rushes in "squoosh"..
You may find things are better when you fit the new fuel pump, do the filter too while you're at it. Both of my cars have been absolutely transformed with new pumps and filters. I'd recommend the Motorsport pump if you're going up to RS2 spec.
Another thing worth checking is the MAF connector, carefully clean the contacts and apply a little silicon grease. Make sure the contacts are actually contacting (if you see what I mean) Someone here posted about squeezing the female contacts closed a little with a tiny screwdriver, be careful though as you could easily damage the contact.
HTH

I also get a huge "suoosh" of air when I open the fuel cap. But this has happen since ever. Thought it was normal.

Will try to clean the MAF connectors.

[newsh]

After that maybe you could fit the new fuel pump and filter before tearing the engine down to fit the RS2 parts?

[newsh]

Do you need to change the rod bearings and head gasket? Or is it an ABY?

[The Spanish]

Do you need to change the rod bearings and head gasket? Or is it an ABY?

It is an ABY.

But I am changing the Head Gasket also just for safety.

[Bibby]

Off Topic, but I'll keep an eye out for your motor at Christmas Rafael.

My mother is from Madrid, we'll be over for a few days visiting family.

[The Spanish]

Off Topic, but I'll keep an eye out for your motor at Christmas Rafael.

My mother is from Madrid, we'll be over for a few days visiting family.

When are you coming?

Following the topic:

I have cleaned the MAF connector. I have found a strange thing. Where the cable connects the MAF there are 6 male connectors. The cable that clips into the MAF has 6 spaces to fit the 6 male connectors. But only 5 of the 6 Females holes on the cable have a metal female connector. The one towards the left has only the hole but without any metal female connector.

I hope I have explain everything correctly.

Is this normal all the cable that goes into the MAF has 6 holes with 6 metal female connectors to fit the 6 male connectors from the MAF?

Thanks anybody for checking this,

Rafael

[S2sedan]

Rafael,

I got a faulty MAF too, it sometimes works perfectly, and sometimes don´t... the consumption gets instantly high when not working as it should. Try clean the hot wire and change your probe. If you don´t have any leak ... it should be OK. Have checked your coils and spark plugs too ???

[The Spanish]

Rafael,

I got a faulty MAF too, it sometimes works perfectly, and sometimes don´t... the consumption gets instantly high when not working as it should. Try clean the hot wire and change your probe. If you don´t have any leak ... it should be OK. Have checked your coils and spark plugs too ???

Thanks a lot.

Can you check that your MAF connection cable has 5 female metal connectors and one hole without a female metal connector.

Because I don't know if I am missing the one to the left of the cable.

Rafael

[S2sedan]

I can do it at lunch time give me 2 hours more and I ll post the answer.

cheers eduardo

[The Spanish]

I can do it at lunch time give me 2 hours more and I ll post the answer.

cheers eduardo

Just to be clear
See picture

Thanks a lot

[Mihnea]

Rafael, this is ok, the MAF only has 5 connected pins inside of it, not more.

BTW, how much boost are you running? can you measure boost in 3rd gear WOT from 1000 RPM and give me boost at 4k, 6k and 7k, and the RPM you're getting full boost at? Maybe do it in 4th too if it's safe to do it in Madrid...

Cheers,

Mihnea