emmisions results
#1
Scooby Regular
Thread Starter
emmisions results
Hi everyone, could you please help me:
my 94 wrx has failed its mot on emissions. results below.
its failed on the c0.
could it be
- bad lamda?
- bad cat?
- exhaust leak?
- cat not hot enough? (every garage I ask to test at 3.5% says they have to use .3% as has this one - they would not even take it out for a longer run to get the cat super hot!
im going to take it else where but could do with some advise on the readings please.
fast idle test
co 0.95% fail
hc 66ppm pass
lambda 0.99 pass
second fast idle test
co 1.08% fail
hc 55ppm pass
lambda 0.97 pass
natural idle
co 2.33 fail
my 94 wrx has failed its mot on emissions. results below.
its failed on the c0.
could it be
- bad lamda?
- bad cat?
- exhaust leak?
- cat not hot enough? (every garage I ask to test at 3.5% says they have to use .3% as has this one - they would not even take it out for a longer run to get the cat super hot!
im going to take it else where but could do with some advise on the readings please.
fast idle test
co 0.95% fail
hc 66ppm pass
lambda 0.99 pass
second fast idle test
co 1.08% fail
hc 55ppm pass
lambda 0.97 pass
natural idle
co 2.33 fail
Last edited by dj219957; 31 May 2014 at 12:51 PM.
#3
Scooby Regular
Thread Starter
hi, the car has been stood for 18 months, I drove it across town as hard as I could to get some heat into it. it was then left for 25 mins before they tested it. I had to leave it with them so I have no idea if they gave it a run first but when questioned they said the car was up to temperature as per any other car they test.
#4
Scooby Regular
Thread Starter
suspect I may have to book another test a bit further away from home maybe? its difficult cos its not taxed or mot at the mo which makes getting it warm before a test difficult.
#6
Scooby Regular
Thread Starter
bit of an update:
I tested the output voltage of the lambda sensor with the engine warm and idling and it was stuck at around 0.4 volts. so ive fitted a new lambda but its the same. it will flick up and down between 0.1 and 0.9volts if I rev the engine but it wont cycle at idle.
I suspect the car is not dropping into closed loop? why would this be? coolant sensor maybe?
I tested the output voltage of the lambda sensor with the engine warm and idling and it was stuck at around 0.4 volts. so ive fitted a new lambda but its the same. it will flick up and down between 0.1 and 0.9volts if I rev the engine but it wont cycle at idle.
I suspect the car is not dropping into closed loop? why would this be? coolant sensor maybe?
Trending Topics
#8
Hi,
I had the same problem at my mot for a 95 WRX RA. I found this pic on a similar post, printed it out and took it back. They passed it straight away. Depending on the year of manufacture the import won't need a cat test if they can't find the exact model on the database. Might help you a little.
I had the same problem at my mot for a 95 WRX RA. I found this pic on a similar post, printed it out and took it back. They passed it straight away. Depending on the year of manufacture the import won't need a cat test if they can't find the exact model on the database. Might help you a little.
#9
Scooby Regular
Thread Starter
the universal lambda for £17 and some drop links for £13 off ebay have done the trick - shes passed! also took that BET info down too and they were alright with it.
Thread
Thread Starter
Forum
Replies
Last Post
fatboy_coach
General Technical
15
18 June 2016 03:48 PM
alcazar
Non Scooby Related
25
11 September 2015 08:45 PM