On the 2.6 the fuel mix at idle using the factory setup is rich to get a smooth running engine. So while the injection does help the converter light off, it was also used to get the HC down at idle.
Is this with the carbureted fuel system or was there a fuel injection system for these? And where is the injection coming in? I thought it was directly into the converter. Do they have air injection into the exhaust manifold?
If your able to hold closed loop at idle I cant see the AIR injection doing you much good. On my Turbo motor it wont pass the sniffer if my air injection system is not working properly.
Kevin
What does it fail for without A.I.R.? Is it HC? I would expect NOx to be much higher with air injection on yours.
I've been curious, did you have to go to the referee for your smog on the black truck? I'd really like to know how all that works and how it went.
On my EFI 2.6 the secondary air (SAS)is supplied at idle when warm, warm up and decelerating. The manual is kind confusing on its chart, I think its wrong. It seems to say the SAS is not functioning warm at idle on page 25-24 in the 88 manual. But in fact it does operate (on my system) and on page 14-14 is says it is operating at idle.
When I failed idle emmisions becasue my SAS was not working I failed for a high CO (1.62) and the HC was high but not failing.
That same chart is used in the carb manual and may be wrong as well. The manual also states that the valve opens to reduce CO and HC.
On the carb motor its used when the motor is cold, on deceleration and at idle for the first 70 seconds (according to the chart).
I'm not sure if the carb is closed loop at idle like the manual infers or not. Looking at the carb I dont think it can do it. Seems to me it can only completly turn off the fuel at idle for deceleration, not modulate it like it does with the main metering system.
My system injects before the converter, just after the turbo.
The ref station was a check to see I had everything for the make and model of the doner car and a test to see that it all worked.
Kevin
