Hi Guys,

When I first got my bravo i noticed it was being very erratic in its fuel consumption. I had no idea what it was but I think I've diagnosed it now.

On some runs it's great, kicking back low to mid 60's. However, other times it's down in the mid 40's and acting like it's really having to work to pull itself along. When it's acting this way and I've got out of the car there has been a strong burning smell emanating from the passenger rear wheel which I think is a sticking caliper.

This is intermittent and just restarting the engine usually resolves it, but on a motorway run it's not exactly convenient to do this. Just wondered if anyone had had this problem and how hard it's going to be fix?


Thanks,
Mark

Diesel or Petrol?

2.0 Diesel

DPF regeneration or clogged EGR valve are the usual suspects.

This is the DPF regenerating. You should not interrupt it if you can avoid doing so. System injects fuel during exhaust stroke, goes into DPF starts catalytic reaction that burns off soot. There are two issues with interrupting this process (apart from the fact the ECU will just try again) firstly the DPF will block up requiring a forced regeneration, DPF clean or even a new DPF. Secondly during the re-generation some fuel leaks past the piston rings and into the sump. This dilutes the oil requiring an early oil change.
Just let it do its thing.

Robert G8RPI.

Just found a massive thread on here all about this issue with the 2.0/1.6 mjets. Seems this is what's going on, although doesn't seem quite as bad as others. Wish I'd read it before I bought the car though as it's irritating to say the least.

What sort of journeys do you do? As long as you do at least a couple of trips per 1000 miles that are over 20 minutes at 40MPH or more you should have no troubles. If you have been interrupting the regenerations it might be worth doing a forced regeneration and an oil change. You need to use a Fiat specialist / Main dealer or specialist software like Multiecuscan or AlfaOBD to force the regeneration.

Robert G8RPI.

The majority of journeys are 40+ miles on fairly open A and B roads so it should have plenty of time to sort itself out on those trips. It just seems to be happening A LOT. Like every single journey the car will go through a 15-20 minute phase of lack of power and crap economy.

Probably not your problem, but try very carefully cleaning out your map sensor on the inlet manifold I noticed that the car ran better after doing it

Hi

I've a similar issue in my Fiat Bravo II 1.6. I got a high fuel comsuption and then the car goes in limp mode. I've tried to clean up the EGR valve and it has a stripped screw and I wasn't able to remove it.
Connecting to ECU with MES it seems the DPF is good, since it is appears as "normal clogging".
I'm going to try to clean up the intake air with a Xenum In&Out. It is a very expensive additive (60 euros) but I've read a good things about its results.
If your car doesn't go into limp mode maybe it is a normal behaviour.

Cheers

Waste of money, no additive will reach the air intake...

Peter Pick-Up said:

Waste of money, no additive will reach the air intake...

Click to expand...

Additive is going to reach the air intake since I'm going to apply the additive in the throttle body.
I dont know what will be the result since I've never used this type of additive.
Cheers

So applying into the throttlebody...
What will be the result..?
A fine mist of disolved debris going straight into the injectors...or chunks of dirt coming loose, clogging up who knows what...??
Or....most likely it will do nothing and will go straight into the exhaust and up in the air......!!!
I don't believe in this kind of sollutions, if the dirt build up inside the intake system is causing trouble, there's only one remedie: take it of the engine and have it blasted.

I'm not recommending neither this additive nor the other one. In fact, this additive is applied into the diesel, I was wrong with others one that are applied into the throttlebody.
I'm just saying what I'm going to do in my car. Results or not...let will see. If I were able to remove the EGR I would do it but it is impossible so far. Cheers

It is very dangerous to apply an additive trough the air intake of a running Diesel engine, you risk that it will rev uncontroled skyhigh....and burst...!!

Aferna said:

I'm not recommending neither this additive nor the other one. In fact, this additive is applied into the diesel, I was wrong with others one that are applied into the throttlebody.
I'm just saying what I'm going to do in my car. Results or not...let will see. If I were able to remove the EGR I would do it but it is impossible so far. Cheers

Click to expand...

You can manualy and/or electronicaly delete the EGR..

It sounds interesting. How to remove the EGR from ECU? Is it possible to perform with MES or do I need another one program? . Cheers

Peter Pick-Up said:

It is very dangerous to apply an additive trough the air intake of a running Diesel engine, you risk that it will rev uncontroled skyhigh....and burst...!!

Click to expand...

Peter Pick-Up said:

You can manualy and/or electronicaly delete the EGR..

Click to expand...

Maybe the right will be try to remove the stripped screw in the mechanic and clean up the the EGR because I've read the EGR should be running in order to get a properly DPF regeneration. I am not sure whether this is true or not. Cheers.

Aferna said:

It sounds interesting. How to remove the EGR from ECU? Is it possible to perform with MES or do I need another one program? . Cheers

Click to expand...

Any skilled remapper can delete it.