You definitely want to set timing and idle speed with the jumper in. How hard could it be to find a paper clip? When you put the jumper in, it locks the timing idle control out (fixes timing at ten degrees, so when you set cam sensor to get 10BTDC, the ecu's timing map is starting from the proper reference point). It also locks out the closed loop idle control and fixes the IAC at a fixed duty cycle right around the middle of its range. If you adjust without the jumper, the idle is closed loop and corrects for whatever you do with the idle air screw. I had to check somebody's base setting at the track this weekend and did it with a piece of safety wire I found lurking on the ground waiting to take out somebody's expensive race tire. Blows my mind people just leave that stuff all over racetracks.
Bill Cardell TurboDog's Dad Flyin' Miata HELP FLYIN' MIATA GO TO TARGA NEWFOUNDLAND! Targa Miata Facebook page FMWestfield Sales 1-800-359-6957 Tech 970-464-5600 Before you call, check out http://www.flyinmiata.com/FAQ/ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of derf Sent: Monday, June 13, 2011 10:27 AM To: Miata Power List Subject: IAC Cleaning? TEN-GND for Timing? Timing? After I adjusted the timing (14 BTDC) and idle (850) my 94 would idle very low when I turned on the AC. The 94 has the IAC solenoid and hot water valve thing in one block unit. I removed/cleaned/replaced the IAC and it seems to work now, the idle droops momentarily when I turn on the AC and then returns to normal. I read somewhere that oil bathed filters like K&N can cause the IAC to get gummed up and stuck. I suspect this is what happened. I ran a K&N cone for a while but I never got around to installing some kind of isolation and it just looked like a hot air intake kit sucking air from the area around the exhaust, so I put the stock filter assembly back on. I was wondering if anyone else had similar experiences? Also, when I set the timing/idle the car was warm but I did not have the TEN-GND jumper in place. Is this necessary? If so, why? I can redo the timing and idle, if necessary but it seems to be running fine. Lastly, what is a good timing for stock street 1.8s? Factory sets 10d. Forums say more for better performance. What do you think? _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
