1996 lt1 auto, right now it idles at about 900 to a 1000 whch seems to be a little high, how do i adjust this
-
1996 Firebird Trans Am ws-6 a4
BBK headers
3in. Exaust with flow 80
Port and Polished Heads
58mill Throttle Body
Lowered an inch
2:73s... 3:42 goin in soon
2001 S-10
Air-Ride - SOLD
2003 S10
Lowered 6 inches
2005 HD sportster 1200 custom
Drag bars
Lowered 3 inches -
sounds fine to me. Mine is about the same.97 Chevy 'Raro Z28 M6- Ported & Polished LT1 heads,beehives,1.6/1.94 valves, 226/231 custom cam,K&N FIPK, 94-95 BBK shorty's,ORY,Magnaflow Catback,no cats,BMR LCA Relocation Brackets,Lower Control Arms,Adjustable Panhard Bar,Eibach Pro Kit,SPEC Stage 1,Walbro 255 Fuel Pump,30LB Injectors,Pro 5.0,Short stick,MSD 8.5's,NGK TR55's,LT4KM
01 Honda CBR600 F4i-Two bro's,Corbins,SS brake lines
-
It's too high for an automatic. Stock programming for the A4 is 550rpm in gear, 650rpm in neutral with the coolant fully warmed up. With the M6, its 800rpm. Keep in mind that the stock tach may read 100-200rpm higher than actual rpm at idle.
The PCM controls idle, based on the programmed value. If it can't get the right results, you have a problem that needs to be tracked down.
The best thing to do would be to put a scanner on it. First check the true idle speed, read from the PCM. Then check the TPS voltage at closed throttle to make sure the blades are fully closed and the PCM knows it. Then check the coolant temperature, to make sure the PCM is getting the correct info. Finally, check the IAC (idle air controller) "counts" to make sure the idle air system is functioning properly.
I have the typical values for all of these in my online scanner writeup:
http://members.aol.com/InjuneerZZ/ScanMast.htm
If you can't put a scanner on it, check for vacuum leaks, sticking throttle blades/linkage. Then consider cleaning the throttle body idle air passages, and the IAC controller.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
Comment