idle issues/5speed swap

bigtony08 · 03-23-2009, 09:31 PM

hey guy just finished my 5 speed swap on my 90 rx7 vert. and it idles up and down for about 10 min when you first start it and then idles fine. what could cause this? also i have a problem when i have my lights on at night and either turn the heat on or have the brakes pressed at idle the car almost kills out and agin it starts idleing between about 250-900. Someone please help cause the gap is coming up soon. Thanks Tony

bigtony08 · 03-24-2009, 06:15 AM

BUMP. PLEASE help ME

sen2two · 03-26-2009, 04:23 PM

its most likely a vacuum leak. lump idles usually are, but not always. also, when you press your brakes, it takes vacuum to the brake booster. so with already having a vacuum leak, the braking is making it worse.

most likely when you were swapping the tranny, you knocked something loose. dont forget about grounding the tranny also. missing grounds have caused a lot of problems. even when you think you dont need the ground. keep it.

BSC Motorsports · 03-26-2009, 07:14 PM

Could be the in gear switch, did you hook it up?

classicauto · 03-26-2009, 07:20 PM

Honestly sounds like the BAC....especially considering that the car almost dies with more alternator load on it. It might be unrealted to the tranny swap, or maybe the wiring was bumped orsomething.

vex · 03-26-2009, 08:15 PM

Check your TPS and set it accordingly. Also try to bump up your idle a little bit, it might be set too low and the BAC is just trying to keep you from stalling out. Beyond that you can check for vac leaks and other misc. problems.

bigtony08 · 03-27-2009, 08:48 PM

thanks guys ill take a look at it. i dont think i grounded the tranny either

03-23-2009, 09:31 PM	#1
bigtony08 obsessed rotard Join Date: Jan 2009 Posts: 249 Rep Power: 17	idle issues/5speed swap hey guy just finished my 5 speed swap on my 90 rx7 vert. and it idles up and down for about 10 min when you first start it and then idles fine. what could cause this? also i have a problem when i have my lights on at night and either turn the heat on or have the brakes pressed at idle the car almost kills out and agin it starts idleing between about 250-900. Someone please help cause the gap is coming up soon. Thanks Tony

03-26-2009, 04:23 PM	#3
sen2two KTEC Join Date: Jan 2009 Posts: 642 Rep Power: 0	its most likely a vacuum leak. lump idles usually are, but not always. also, when you press your brakes, it takes vacuum to the brake booster. so with already having a vacuum leak, the braking is making it worse. most likely when you were swapping the tranny, you knocked something loose. dont forget about grounding the tranny also. missing grounds have caused a lot of problems. even when you think you dont need the ground. keep it. __________________ what I have: 1985 Gs:12a All motor Drag car - 1973 Rx2: Play car What I had: 93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2

03-26-2009, 07:14 PM	#4
BSC Motorsports The Newbie Join Date: Feb 2009 Location: Innisfil Posts: 17 Rep Power: 0	Could be the in gear switch, did you hook it up? __________________ www.bscmotorsports.ca

03-26-2009, 08:15 PM	#6
vex RCC Loves Me Not You Join Date: Jul 2008 Location: Influx. Posts: 2,113 Rep Power: 20	Check your TPS and set it accordingly. Also try to bump up your idle a little bit, it might be set too low and the BAC is just trying to keep you from stalling out. Beyond that you can check for vac leaks and other misc. problems. __________________ The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group

03-24-2009, 06:15 AM	#2
bigtony08 obsessed rotard Join Date: Jan 2009 Posts: 249 Rep Power: 17	BUMP. PLEASE help ME

03-27-2009, 08:48 PM	#7
bigtony08 obsessed rotard Join Date: Jan 2009 Posts: 249 Rep Power: 17	thanks guys ill take a look at it. i dont think i grounded the tranny either