I have tryed to set the IAC and the TPS and it just will not set and stay . Every time I set them and shut off the car , they reset them selfs back as soon as I turn car back on. Is it all that important on proformance when I have done alot of motor mods and still have same chip ? Is that why it wont stay set on the new settings ? My idle never stays the same , it jumps around alot .
Thanx alot for any help.

 

ID,

Have you cleaned and lubed the IAC stepper motor pintle (rack gear)? In addition to setting the minimum air, you should also clean the IAC and its air passages when performing this adjustment.

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Later,
Vader
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"Let the bodies hit the floor!"
Adobe Acrobat Reader

 

I have a heavily modified 88 camaro that also idles between 900-1200rpm. I am using a custom chip and with the IAC count at around 18 it seems to idle well at 1000 rpm. It seems this is neccesary with a 230/230@ .050 non-roller cam in a tpi engine. If you have access to a scan tool (I used a hand-held from snap-on) it will tell you your chips desired idle speed and will also display tps and iac readings. good-luck

 

I had big problems with my idle on my new 383, try to raise TPS voltage a little it helped for me........

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GTA -89:383, 4-bolt,Free flow muffler,dual 3" HF cats, Edelbrock headers, Canfield heads, 1.52 RR 7/16, ZZ-9 cam, Big Mouth, AS&M LTR, !plenum, 52 TB, MSD 6AL, TPIS level V prom, Superior shift-kit and all the minor mods,looking for a SR ...
http://www.itv.se/tacs/members_cars/m279/m279.html (Swedish Trans Am Club)

 

could you give a little info on your car SD or Mass any mods.This could possiablly help shed some lite on the matter

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1991 1LE Z28 355cu 5SPD (ORIGINALLY 305 BEST E.T. 14.186@99.86mph)NO PASSES ON 355 YET.MINI RAM INTAKE,AFR 190 HEADS,10.23:1cr 24# SVO INJECTORS,BBK 52mmTB,AFPR
FULL ROLLER MOTOR,1.6 rockers MSD 6AL
AUTOMETER A/F GAGUE MARCH PULLEYS,HEDDMEN HEADERS 3IN EXH NO CATS FLOWMASTER,POWER TRAX NO-SLIP LOCKER,3:42 GEARS,LAKEWOOD LOWER CONTROL ARMS HOTCHIKS STRUTTOWER BRACE,COMPETTION ENG.SUBFRAME CONNECTORS
MALLORY TACH W/SHIFT LITE
BLACK, TINTED WINDOWS, TAIL LIGHT COVERS BIG BLOCK COWL INDUCTION HOOD,SHAVED DOOR HANDLES

67RS 327cu 92K ORIG MILES.NEWER GM HEADS HEADERS,650 HOLLEY CARB,CAM, 350 TURBO TRANS W/SHIFT KIT&COOLER 12 BOLT POSI 3.73'S MUTLILEAF SPRINGS
NEW VINYLROOF&CARPET, COWL HOOD,HIDE AWAY HEAD LITES,

 

The motor is a 383 , orig a 5.7 . It has been stroked at 372% it has a roller 218/480 cam and 10:01 kb piston,headers,gutted air box,K&N,3 in exaust, no cat, flomaster ,roller rockers heavy springs and the good plugs and wires.
Thanx