Barry S. wrote:
>>Dkakd wrote:
>>
>>>My 1990 acura integra did not pass Virginia emissions due to high CO2 at 25
>>>MPH. I think limit was 80 PPM and it tested at 140 PPM. It has news plugs,
>>>clean filters, and 173,000 miles.
>>>
>>>Is this a simple mixture adjustment? Thanks,
>>>
>>>Dan
>
>
>
> Based on the #s provided, I suspect there is some sort of fuel control
> problem.. HCs are elevated at 25, but fine at 15. CO is fine at 15
> MPH, but off the chart at 25 MPH.. So somewhere along the test, I
> think the car broke into open loop mode. (non-fuel-control) This is
> something you may want to send to a mechanic.
>
> I once had an 87 Dodge Colt? pop in and out of fuel control, dash temp
> gauge suggested it was at operating temp. The connector to the
> separate ECT (coolant) sensor was making an intermittent connection
> and bouncing the car in and out of fuel control.. Fixed the
> connection and the car passed with flying colors.
>
> __________________
> Note: To reply, replace the word 'spam' embedded in return address with 'mail'.
> N37.3 W122.0


i second that. had an identical problem with a civic - fixed the leaky
radiator and the sensor stopped getting airlocked & sending the wrong
signal to the ecu. it was fine after that. beware the expension bottle
- it can look normal but the rad can be empty.