What do I ground for Biss mode?

[pj91gsx]

my brother says i need to ground a pin on the diagnostic port and the other plug near the battery. Which pin do I ground on the diagnostic to put the car in biss mode so I can set the ignition timing and bring down the idle.

 

[Avionixx]

# 10 terminal on the DLC. That would be the third pin from the bottom of the right row. The VFAQ has a blurry image of it, but it should give you an idea.

http://www.vfaq.com/mods/BISS-1G.html

 

[JayRolla]

Just ground the pin on the connector near battery. Do it when the car is running so you can hear the idle change and you know its grounded right.

 

[pj91gsx]

ok. I grounded it. Im confused on how to reset the idle. do I take the biss screw completely out and crank it and put it in?

 

[turbosax2]

Did you even read the vfaq?

Here'd the cap off of the BISS - use a screwdriver to turn it in or out until you get the idle adjusted properly. Turn it gently, you don't want to bottom it out too hard, as it can screw up the air passage, and you don't want to turn it out all the way, have it pop out, and lose it, as they are hard to find (Mitsu part # is MD614948 and it's called, "Adjusting Screw, Throttle Body". You need a #5 O-ring (3/8x1/4x1/16, available at most hardware stores), now available as Mitsu part # MD608806. This goes right under the head of the screw in that valley that looks as if an O-ring should go there.).

So turn the BISS until the idle is correct, then shut the car off, remove the wire from the diagnostic plug, remove the timing plug jumper (reinstall the cap!), and start the engine. Let it idle for about 5 minutes, and see if the idle is normal.

 

[pj91gsx]

yes i did. I guess i didnt understand that part of it. I started the motor without the screw and it stalled so i wasnt sure if i did it right. So then i put it in and it idled at 3000.

 

[turbosax2]

Screw the biss in more to lower the idle until you're satisfied.

 

[pj91gsx]

ok. I got it together. Thanks for the help.