Technical fiat 500 multijet smoking??

Currently reading:
Technical fiat 500 multijet smoking??

coverworks08

New member
Joined
Nov 1, 2017
Messages
12
Points
3
hello, ive just noticed that every 100 or so miles i have large amounts of white/grey smoke, the revs go up to 1000rpm....at first i thought it was the DPF doing its thing but there were no lights coming on the dashboard until tonight!the amber symbol refers to"injection failure"in the manual....any advise please?thanks
 
What sort of light is it because I don't think there is any light for injection failure
 

Attachments

  • $_86.JPG
    $_86.JPG
    110.5 KB · Views: 68
Quote Originally Posted by grimwau View Post
Hi Cooya and welcome to the forum.

I had a 500 1.3MJT and I thought it was an excellent car but the one problem that I had was to do with the DPF (Diesel Particulate Filter). Every so often, depending on various parameters the accumulated soot in the filter needs to be burnt off and to do this the ECU needs to trigger a regeneration cycle. Basically, this squirts extra fuel into the engine each exhaust stroke and the consequent superheating of the exhaust gas burns away the excess soot build up.

It is posssible that the smoke you saw was the result of this regeneration procedure. Other signs of when it is regenerating are the tickover at idle speed increases from 800RPM to 1000RPM or if you are driving a quick look at the instant fuel consumption readout will show a considerable increase.

There is a are a few threads directly relating to this in the 500 section if you need more information.

------------------------------------------------------------------------------
Hi there hopefully someone still on this thread...

Ive recently purchased an 08 500 1.3 MJ diesel... Beautiful thing that she is, she's started to do exactly the above.. Whits smoke and increase in fuel consumption. I've had her checked and they've done a full oil water filter service and a dpf regeneration and cleaned out with hydro crystals (is it) ?! Now 4 days later she's still blowing and using too much fuel.

I've tried looking through other threads but get confused with what I need checking out next.

Garage has said everything seems OK including injectors and that to replace them could be 1000's which they'd rather not put me through. Other than that theyve no idea.

Does the ecu (whatever that is) need resetting!? Is it the injectors?!
Plain English prefferd as I am not mechaniclly minded.
__________________
 
It's over fueling.
White smoke is unburnt diesel.

As it's repeating this at set intervals it could be it's over fueling to perform a DPF regeneration, and that process is failing
So the extra fuel it injects to ignite in the DPF is findings it's way out the exhaust as fuel vapour.

Now comes the bad news.
This unburnt fuel will find it's way past the piston rings and contaminate the engine oil.
If it's been doing it for a while you may notice the oil level start to rise on the dipstick and the oil stink of diesel.

This contaminated oil isn't good for the engine, but it can also get thrown out if it's way too high and the engine will "runaway", ie run on the stuff at full chat, with no way of stopping it until the motor goes bang in a big way! (diesels will run on anything oily)

A code read is a good place to start, but you'll more than likely pull faults caused by this AND perhaps the code for the fault it's self, they can all pile into each other and throw lots of red herrings.

I would check the oil and it's level and if it appears ok, take it to a diesel specialist, there are plenty around and they'll be best placed to test it, identify the problem and fix it.
 
Last edited:
I would check the oil and it's level and if it appears ok, take it to a diesel specialist, there are plenty around and they'll be best placed to test it, identify the problem and fix it.

That.

A garage with the right software should be able to interrogate the car to find out the state of the DPF. After nearly 10 years service, it could well be in need of replacement.

Replacing the DPF will be a lot cheaper than replacing all the injectors.
 
Back
Top