Yellow - FS Project Seicento 2

[bad_boy_cinq]

is the car Mcrich chip in the ecu ? as mine failed emitons massively with it in , Put a standard ecu in with a standard chip in and it passed with flying colours ...


Ill have a read and come back to this

 

[imported_abyss113]

there is a mcritch yes could try a standard ECU

 

[lkc]

Do we still have a standard ecu in the shed Martyn? Or did FiaSco's get chucked/soaked?

 

[M21MFS]

We have a standard ECU from Fiasco, yes. But would this not mean keys from Fiasco would be required too?

Can't remember the situ with the Centos and the red master key? Is this the same as the Punto saga?

BTW thanks to Ming for the train of thought that is now leading us towards a (possibly) dodgy crank sensor. It's on the list of things to check

 

[mrcinquecento]

If you're going standard ecu, you'll need to swap the ecu, code box (under the dash, drivers side), and ignition barrel to use fiascos key.

All easier than it sounds tbh.

 

[mrcinquecento]

OR, you could try a little trick.

fit fiasco ecu and codebox, tape fiascos key securely to that codebox. The box "detects" the chip in fiascos key and in theory, should be able to start with anything that turns the ignition then. A very crude way of bypassing it.

 

[imported_Ransoman]

Another thought. How old is the Cat and is it a genuine part? I have heard of aftermarket cat's containing so little precious metals that they are only capable of passing emissions when brand new and failing the next year.

 

[Stuart]

Finally someone is speaking sense. When emissions are out, the cat is normally the first thing to look at, then lambda and maf. The ecu suggestion by me is an absolute last chance stab at it.

 

[imported_abyss113]

like i said around 3 times in other posts the CAT is NEW but 3 years old so its up to you if you change or not

 

[clock34]

wont be the cat i promise you... cant be, they pass even without one fitted!! lol.

it HAS to be lambda or the fueling screw. (verrrrry last thing the ecu but ive never herd of it personally, i ahd a mcritch also and it passed).

dead easy to check. buy a £2 diagnostic cable and plug it in, it will tell you if the lambda is working straight away.

 

[lkc]

Finally someone is speaking sense. When emissions are out, the cat is normally the first thing to look at, then lambda and maf. The ecu suggestion by me is an absolute last chance stab at it.

On FS...the site of Scottish fiats....

Surely not :laugh:

like i said around 3 times in other posts the CAT is NEW but 3 years old so its up to you if you change or not

Did the car ever get used after the new cat was fitted?

wont be the cat i promise you... cant be, they pass even without one fitted!! lol.

it HAS to be lambda or the fueling screw. (verrrrry last thing the ecu but ive never herd of it personally, i ahd a mcritch also and it passed).

dead easy to check. buy a £2 diagnostic cable and plug it in, it will tell you if the lambda is working straight away.

Lambda is a new bosch one from ebay so unless it's a really good-looking but bad fake it should be ok.


My worry is that we're now going back and forwards with suggestions but still with no concrete idea on how to sort the problem. Crank sensor is the favourite on FF, cat is favourite for some on here and now also the fuelling screw can be added into the mix.

The problem of course is how to find out if we've solved the problem on the cheap... which is made worse by the fact that Yellow has no MOT or tax.

So, now we have several possible answers to the high emissions problem but does anyone have an answer to how we test the fix(es) without completely depleting the FS show bbq budget?*







*Priorities matter

 

[mrcinquecento]

Fuelling screw should be fine unless replacement had been turned too), was the reason i said to change the throttle body over!

emissions all passed bar the lambda on the first test. Lambda got replaced and emissions on other areas then failed but it ended up passing lambda test on second hi rev test, so that says to me there's an exhaust leak given the situation improved in time.

the crank sensor is more for the hunting when hot (which wont help emissions) and cutting out issue, there's some doubt about it given there were starting issues and the problem was traced to that sensor needing some work, so it could be dodgy.

ecu, i had a mccritch and sailed emissions... Though i had big trouble with overfuelling but got it to settle down by changing sensors. Mccritch wont be the sole cause of emissions fail but won't be helping either, seems very much car and setup dependant whether it causes emissions problems, as James pointed out when he said it failed his when fitted too.

 

[bad_boy_cinq]

Find a garage that will pass it with no emition test = job done

 

[M21MFS]

Fuelling screw on new TB is untouched, as best we know.

Friendly MOT centres don't seem to exist up here any more James

Everything by the book.

 

[imported_abyss113]

did a little reading uo

1. If a vehicle fails for high CO at idle and /or __af_placement_id--[AFF-PLACEMENT-ID].html]fast idle then.... if Lambda is too low, the mixture is too rich. This can be caused either by a misfire or by a faulty Lambda sensor. If it's running very rich, the 02 and HC will be higher than normal.[/*:m:2bkfr5wu]
2. if it has a high Lambda and high 02 (0.5 to 1.5%), the "CAT" could be faulty. Before condemning it make sure its hot enough to work, the Lambda and other sensors are working OK and the exhaust downpipe hasn't got any leaks.[/*:m:2bkfr5wu]
3. if the vehicle fails for high HC then ...if the CO passes, the vehicle is probably misfiring. Or if the CO fails and the Lambda reading is too low, the mixture is probably too rich and it may also be misfiring.[/*:m:2bkfr5wu]
4. if the CO fails, the Lambda reading is high and the O2 reading is high (0.5 to 1.5%) the "CAT" could be faulty. Again check out the simple measures above before condemning it.[/*:m:2bkfr5wu]
5. if the Lambda (reading) fails then... if its too high the Lambda sensor may be faulty, the mixture may be too weak or there may be a hole in the exhaust downpipe. If Lambda is too low the sensor may be faulty, the mixture may be rich or the vehicle may be misfiring.[/*:m:2bkfr5wu]

so check all manifold gaskets and system in case any of the paste has cracked at joints
high lambda is result of to much oxygen in the exhaust system and the airbox issue again i have also found i still have 2 of the 899 bobs for the induction kit with a rubber seal

and im a tight barsteward so this is the cheapest options i can come up with

 

[imported_Ransoman]

The airbox does have a leak but it is before the airflow sensor so surely can't be affecting its running?

I didn't think it had any exhaust leaks but the engine does sound raspy. I assumed it was the stainless manifold.

 

[clock34]

flame me down but.... batter the tits off it before the test. get the cat glowing..... usually works tbh.

im struggling to help here like i said, ive had them pass with no cat. so a new lambda and no air leaks and you should be ok.

double check inlet mani for air leaks along the seal? and on the Throttle body.

labdas are dead easy to replace and almost all fiat ones are neigh on identical. surley you have another you can test it with?.

also, what age is the car again? if its after 51 plate, get it on FES and get the lambda up see what its doing, and the air/fuel also.

 

[Stuart]

Brand new Bosch lambda on just before the retest bud, the knocking the tits off it thing is a favourite of mine too, when I had it for the original test it was sat at 2500-3000 rpm for 25-30 mins before test and I was getting some looks from the *ahem* mechanics and it passed the co2 and hc, im unsure how much welly Martyn gave it for the retest as I wasn't there.

 

[lkc]

Possibly more as we were at the test centre early and kept waiting for 20-30 minutes when he kept the engine revving throughout. Plus there was a wee run including up the A96 at 70 mph to get there. Fan kept coming on throughout the test so the engine was definitely hot

 

[imported_abyss113]

maybe try an original manifold ??