T5 V70 - multiple problems !

[Jon45]

I was wondering if anyone can shed any light on these problems I've been suffering recently, resulting in the car being off the road at the moment.

It's a late 2000 (P2) V70 T5 SE Geartronic.

I've had the car for 3 years, and it has a good service history. Has had electric fan recall and the ETM cleaned by Volvo.

About a month ago I replaced the exhaust system from cat-back with a genuine Volvo part (from Rufe). I also changed the oil/filter and air filter.

Last weekend, the engine fault light came on , and with my BSR diag tool, got the following codes:
ECM 3503, ECM 3513, ECM 9400, ECM 261A.

The following codes I already new about - relating to other door like issues -
CEM 1A53, CEM 1A52, CEM 1D02, CEM 6A01

The symptoms were lack of power, very rough running - and lots of smoke.

I pulled over, and after reading codes, I cleared them.

The car then ran better, but shortly started losing power and seemed to have developed a misfire on all cylinders in a "random" manner...

I got recovered home by the AA, and set about sorting this mess out...


The codes now read as:

ECM 3503, ECM 3513 only.

The other strange thing is that both the coolant level had plummeted to almost empty, and the oil level was barely touching the dipstick (after letting it all cool/settle down). I had checked and topped up both the day before..

Could this be blown headgasket ? The fault codes say Cat Converter - maybe that or the probes have been damaged by excess oil/water etc being blown down the exhaust ?

To top it all, got woken up last night when alarm went off - to find battery on car was flat, alarm was running a bit flat (not sounding quite so alarm like at this stage) - so pulled fuse to alarm, to silence it, and put battery on charge. This is a new BOSCH battery as same thing happened about 3 weeks ago.

Any ideas gratefully received !

Thanks
Jon

[outnumbered]

have a look here click o the code and you will get a description.
mike

http://www.ppc-diagnostic.com/codes/eECM/

[Jon45]

Thanks - I'd already looked there for the codes - and got this:

ECM 3503 - Misfire Cylinder 1 (or 2-5) or all - Catalytic Converter Damage / Emissions
ECM 3513 - Misfire Cylinder 1 / Faulty Signal / Catalytic Converter Damage

I've had the spark plugs out - all looked OK but were a bit sooty.

One of the codes I had earlier in the failure was ECM 261A - fuel trim / pressure which I believe can be caused by a faulty MAF..

So, I will try unplugging that and see how she runs.. and what new error codes are stored if any...

[Chris_Rogers]

I think you are going the right way.

The water & oil issue is a concern, have you looked at the oil cooler at the rear of the sump to see if there is anything obvious there?

[Mountainbikeskills]

dont want to be a purveyor of doom, but if you've lost that much
coolant and oil in 1 day, and its not on the floor..., the only place it can have gone is through the headgasket ... hence the smoke

[Jon45]

An update on the problems.

I've not had much spare time, so this took a back burner for a while.

The coolant leak was the radiator, and the oil leak was multiple sources, including
a faulty O ring seal on the filter canister, and a pipe to the oil cooler.

Those faults are completely cleared.

I also replaced the MAF unit as I had been getting intermittant diagnostic codes relating to that.

Now, the car starts, emits black smoke from the exhaust for about 5 seconds and stops.

I am getting ECM 3503/ ECM 3513 errors ONLY now.

I guess this could be the sensors that are in the exhaust system ?
Or could the problem be ignition related (coils/plugs/timing) ??

Any ideas folks ?

Many thanks
Jon

[Clifty1175]

Take it to a dealer maybe.... Or a mechanic of some sort!!

[Chris_Rogers]

Misfire on cylinder 1, if the spark plugs are OK. is most likely due to a faulty coil pack.
You could try swopping No. 1 coil with another cylinder, say No. 5 (ECM-3553 Misfire cylinder 5) and see if the fault moves with the suspect coil pack.

If so replace the coil pack, if not a good look at the wiring to cylinder 1 coil followed by a compression/leak down test would my next moves.

[Jon45]

Thanks Chris... I just checked the plugs - No 1 looked clean, 2-5 all looked very black and
sooty..

It's possible it could just be running on Cyl 1 (unlikely though).

If 2-5 aren't firing I guess it's more likely to be a wiring fault / "ecu" type problem rather than having 4 faulty coil packs ?

The plugs have done about 30k miles - they are the platinum type..

I'm loath to take this to a dealer (well, it wont actually get there under it's own power).. as I just know they'll rip me off!

Thanks
Jon

[Chris_Rogers]

Sounds more to me like there is no fuel getting to cylinder No.1 and the rest are over fueling for some reason.

Maybe the first step is to clean up all the spark plugs and have a look at the wiring to the fuel injectors.