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Re: Carrera 3.2 continued emissions / idle misery...
Posted: Fri Aug 11, 2023 10:32 am
by RobFrost
911hillclimber wrote:My 73T has a 1986 3.2 in it, sis headers etc and wired by Paul Broke at Bob Watson place in 1994.
That round plug is there in the hybrid loom but no sensors etc. On the engine or connected or bypassed.
Has run perfectly since installation.
Do you know what your CO is at warm idle?
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Re: Carrera 3.2 continued emissions / idle misery...
Posted: Fri Aug 11, 2023 1:28 pm
by 911hillclimber
No Rob, the MoT man sees the car as a 73T so outside of any emission testing.
Re: Carrera 3.2 continued emissions / idle misery...
Posted: Fri Aug 11, 2023 3:16 pm
by RobFrost
911hillclimber wrote:No Rob, the MoT man sees the car as a 73T so outside of any emission testing.
That might be the difference. I could get mine to idle ok with a slightly high idle speed, but I'm hoping this o2 sensor will fix the emissions.
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Re: Carrera 3.2 continued emissions / idle misery...
Posted: Fri Aug 11, 2023 8:11 pm
by hmg66
My 1986 3.2 Carrera has a CO2 warm idle of 0.70…the limit is 4.50.
The HC ppm VOL is 37 out of a 1200 limit.
It’s been like that for years but I’ve never really questioned whether that’s good or not?
I always make sure it’s fully up to temperature prior to the MOT though.
I used to have a V12 BMW 8 series…now that WAS fun trying to get it through an MOT !!!
Re: Carrera 3.2 continued emissions / idle misery...
Posted: Sat Aug 12, 2023 6:34 am
by RobFrost
hmg66 wrote:My 1986 3.2 Carrera has a CO2 warm idle of 0.70…the limit is 4.50.
The HC ppm VOL is 37 out of a 1200 limit.
It’s been like that for years but I’ve never really questioned whether that’s good or not?
I always make sure it’s fully up to temperature prior to the MOT though.
I used to have a V12 BMW 8 series…now that WAS fun trying to get it through an MOT !!!
Thanks. If that's CO it's good and low. Mine I think was 5 or 6 without the O2 so it'll be interesting to see how much having one brings that down.
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Re: Carrera 3.2 continued emissions / idle misery...
Posted: Sat Aug 12, 2023 7:07 pm
by crisc204
Short story.
UK cars did not have CAT from factory, this car is meant to run a solid 1.5% C02 at idle.
You can set it higher so it runs nicer
Mines set higher that 1.5%
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Re: Carrera 3.2 continued emissions / idle misery...
Posted: Tue Oct 10, 2023 3:16 am
by jjeffries
More than 2% CO would be very stinky and yield lousy MPG.
John
Re: Carrera 3.2 continued emissions / idle misery...
Posted: Tue Oct 10, 2023 8:24 am
by RobFrost
jjeffries wrote:More than 2% CO would be very stinky and yield lousy MPG.
John
It's only at idle. I think the mixture is good under load and other engine conditions.
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