85-86 Chips, any problem with emissions?
02-05-2007 | 01:59 PM
#17
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Originally Posted by Imo000
Ok I see! How about putting evrything back to stock and then install the chips. Have the LH go throught the learning process and then test the diference. This way you can see how much perfromace are from the chips. Maybe all the other tweakings make the chips less effective or perhaps your adjustmens bring the engine up to the same perfomrance level as the chips. Does this make any sence?
...
Advancing the idle can lower the engine temps (but emissions go up). I'll try disconnecting the idle switch input from the EZF. That will increase the idle advance from 10° to 20° (+3° if coolant temp low).
The idle switch wire is white (convenient), terminal #4.
02-08-2007 | 10:37 PM
#18
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20° advance at idle is a bit too much! It makes starting more difficult, and the idle controller has a had time keeping up with the rapid rise in rpms.
What I ended up doing was pretty simple, after some thought. I made it so I have 3° advance at idle only. This makes the engine run cooler at idle, the exhaust is slightly quieter, and it is smoother when rolling on the throttle, as the jump is smaller, 13->22, instead of 10-22. (22-24 is with chips, stock is 20, just off idle.)
I did lose the cold engine advance at cruise, but it was unnecessary with the chips, and sometimes, I think, gave too much advance added to the chips, and made it stumble just off idle, when cold.
What I did was wire a 4.7K resistor to the idle switch input, and disconnected the Temp II input. When the idle switch goes to ground, it supplies the Temp II input with a cold value, and so it advances 3°. Off idle, the Temp II input is open, which is a fault, so EZF removes the advance.
I used the same switch as the EZ-F'r, so I can turn it off.
What I ended up doing was pretty simple, after some thought. I made it so I have 3° advance at idle only. This makes the engine run cooler at idle, the exhaust is slightly quieter, and it is smoother when rolling on the throttle, as the jump is smaller, 13->22, instead of 10-22. (22-24 is with chips, stock is 20, just off idle.)
I did lose the cold engine advance at cruise, but it was unnecessary with the chips, and sometimes, I think, gave too much advance added to the chips, and made it stumble just off idle, when cold.
What I did was wire a 4.7K resistor to the idle switch input, and disconnected the Temp II input. When the idle switch goes to ground, it supplies the Temp II input with a cold value, and so it advances 3°. Off idle, the Temp II input is open, which is a fault, so EZF removes the advance.
I used the same switch as the EZ-F'r, so I can turn it off.
