V70R 2005 throttle hesitation problem

[omn]

Hello.

I've a friend of mine that bought a long time ago a Volvo V70R from 2005. The car have already been reprogrammed (ECU) when he bought it. The car is amazing, I love it, but there is a problem that is disturbing him for long time. He didn't find a solution yet, and before he makes a mistake and sells it, I would like to explain you the problem and ask for help. By the way, we are both Volvo fans, specially in the R division!

When the car is accelerating from low speed, independently from being full or half throttle, it hesitates about the 2500-3000 rpm, and after I doesn't keep developing as good as it might. I'm not quite sure it happens only in those rpm's, that what I witnessed, because later, when he rev it up and start accelerating, instead of being linear, it felt perfectly "normal!" for a V70R.

He already change MAF, plugs, hoses, ignition coils, things in the turbo system (I'm not quite sure what) a many things more, but he doesn't get the point. It is driving him crazy, because he already have it for 3 years.

I bought a Volvo ECU in ebay in order to try to get the original configuration, to see if the problem is related to the ECU reprogramming. It wasn't from a Volvo R, but the codes match. Now we are trying to get someone to unlock it.


Please, any help you can provide I will appreciate, specially if you know exactly what I'm trying to expose, if you had the same problem for example. I will try to provide you every information you require too.

Thanks
Best regards!

[Harvey]

Hi here is a older thread worth a read.
http://www.vpcuk.org/forums/showthre...46561-R-owners

Don't even try to mess with the ECU as it must be coded to the car by volvo.
If you try a same one from a R it will not work.

[volvokid]

Has he took it to a main dealer yet?
It can't be the ECU map if he has run it for 3 years without a problem. Software doesn't change over time.
I had a running issue that turned out to be a dirty throttle body.
Also post the question on T5D5 these cars are complicated and rare so the more people that read it the better.

[graemewelch]

clean the etm. im 99% sure thats your issue

[RobA]

I'm betting on the fuel pressure sensor as per the linked older thread. Same symptoms as my dad's S60R before it completely failed and left me stranded on the M1......

[omn]

Hello again.

I want to upgrade all the information I have right now.

First point. The ECU's photos.

This is a photo I've taken from the original ECU present in the V70R. We are not sure about that marked chip, we think it's not original, or at least, is it seems to have been "re-welded"
->

This is the original ECU outside references and codes.


-------------------

Next there is the ECU bought in ebay in order to try to unlock it and see if with an original map the problem disappears.


As you can see, it comes from a S60. For the last photo codes, we think it is the same map (Volvo R's after 2004 restyling), but we are not sure.



This is just to add more information.

[Harvey]

Hello again.

I want to upgrade all the information I have right now.

First point. The ECU's photos.

This is a photo I've taken from the original ECU present in the V70R. We are not sure about that marked chip, we think it's not original, or at least, is it seems to have been "re-welded"
->

This is the original ECU outside references and codes.


-------------------

Next there is the ECU bought in ebay in order to try to unlock it and see if with an original map the problem disappears.


As you can see, it comes from a S60. For the last photo codes, we think it is the same map (Volvo R's after 2004 restyling), but we are not sure.



This is just to add more information.

You can not use them,volvo main dealer must code them to the car with a software update for the engine to start.

[omn]

Hi here is a older thread worth a read.
http://www.vpcuk.org/forums/showthre...46561-R-owners

Don't even try to mess with the ECU as it must be coded to the car by volvo.
If you try a same one from a R it will not work.

Thanks for the link.

About the ECU, from what I was informed, Volvo is precisely the place where it can't be done. If I want to unlock the ECU bought in ebay I shouldn't go he shouldn't go to the Volvo dealer. He just bought the other ECU because the original one cannot be cleaned and remapped with the original map in Volvo, at least that's what they said. They claim the problem is related to the chip shown in my last post.

Yes it won't work because each ECU is linked to one car, but the ideia is that if we unlocked it (I'm not sure but I think it might have to be with the immobilizer), the map will be the same.

Has he took it to a main dealer yet?
It can't be the ECU map if he has run it for 3 years without a problem. Software doesn't change over time.
I had a running issue that turned out to be a dirty throttle body.
Also post the question on T5D5 these cars are complicated and rare so the more people that read it the better.

- Yes, he took it to different Volvo dealers and no one found the solution. He told me that the van doesn't give any error code even. He also told me that a experienced engineer there told him that these mkII R's are too sensible and dependent from electronics (I'm just quoting).

- I don't know if I explained myself correctly, he has the car for 3 years, the problem have always been there from the beginning.

- We will check that, if he hasn't already checked it, thanks.

- Yes, they are really complicated, and yes, more people better, but sometimes it's also a problem, you don't imagine how many people give us the opinion about so many different things and until now, nothing works.

PS: I've to say that he has a friend with a 2003 V70R (pre-restyling) that is working perfectly. It has also a remapped ECU, but it works perfectly, so he tried to change a lot of parts from one to another without success, he didn't find the problem.

clean the etm. im 99% sure thats your issue

We will try if he haven't checked that situation before, thanks!

I'm betting on the fuel pressure sensor as per the linked older thread. Same symptoms as my dad's S60R before it completely failed and left me stranded on the M1......

Thanks for your help. We will check it too if he didn't done it before. About that failure, the van never completely fail, it simply doesn't keep developing as it should.

[volvokid]

Get that etm cleaned the problems it caused on my car was unreal. The first dealer I took the car too couldn't find the issue.

You say the problem has been there since he has had it.... so it could be the map.

[omn]

Get that etm cleaned the problems it caused on my car was unreal. The first dealer I took the car too couldn't find the issue.

You say the problem has been there since he has had it.... so it could be the map.

etm means Electronic throttle Module, right?

Cleaning how? like the link below.
http://www.justanswer.com/volvo/32bx...ator-seem.html

Carbon deposits, electrical connections, etc?

Thanks

[omn]

Hello again, today we've made an huge clean and it didn't solve.

All the parts you suggest (Fuel pressure sensor, CTV, ETM, etc) have already been changed for try and also didn't solve...

Everything is now pointing to ECU.

I've driven the car today and it's real strange to feel so limited, seems like it always blocking or correcting itself. I tried with Sport and Advanced Mode, DSTC On and Off, nothing change.

Do you have suggestions to unlock the ECU and insert an Volvo V70R after restyling map? Volvo doesn't do it here.


Thanks again for all your help.

[volvokid]

If you have money, I would be contacting a tuner for a new map. I hope this map hasn't damaged the engine.

[volvokid]

Does the car loose any coolant?

[Harvey]

Have you looked for boost pipe leaks,is the standard cat still fitted,the turbo contol valve pipes ok,turbo control valve under air box ok,have anyone played with the waste gate rod does it need reset with a pressure guage.
If volvo main dealer did a software update to the car it should put a standard map back on the ecu.when I took my motor in for service they asked if it was remapped as the update would remove a engine map.

[LeeT5]

Have you looked for boost pipe leaks,is the standard cat still fitted,the turbo contol valve pipes ok,turbo control valve under air box ok,have anyone played with the waste gate rod does it need reset with a pressure guage.
If volvo main dealer did a software update to the car it should put a standard map back on the ecu.when I took my motor in for service they asked if it was remapped as the update would remove a engine map.

Harvey mate, i think your wasting your breath as it's clear he's not listening to you.

Maybe you should shout abit louder...like this....

THE ECU WILL NOT WORK!!!!!!

........There.

Anyway, the two most common problems that can cause the symptoms you describe OMN are FPS and MAF sensor. You say you've replaced them but with what? Second hand parts or brand new oe parts?

I had EXACTLY the same symptoms and it turned out to be a FPS.

Harvey is right, if the car is mapped then the only way to be sure you don't have a faulty MAP is to loose it. That means driving to the dealer and asking for a ECM reload.
the ECM will be where the MAP is installed, so reloading it will put a standard (up to date) R map back on the car. It only costs £40. If that doesn't work then at least you can rule out the ECM or ECU (as you keep calling it).

Word of advice, there are many ECU's on V70R/S60R and they all control various components on the vehicle. IE, CCM - Climate control module, BCM - Brake control module, ECM - Engine control module....etc etc. The remap (if it has one) is on the ECM.
An ECM reload will not affect the other Control modules. Volvo can also do a FULL Module reload. This is basically a software check and update of ALL modules. Costs vary but you'll pay for the software and labour obviously.

The only way to really nail this fault is to take the car to a dealer and have them interogate ALL the live readings looking for anything that shows out of place and out of tolerance OR close to it.

Otherwise, your pi#sing in the wind and wasting money.