The "hows your idle" thread.
08-12-04 | 11:14 AM
#1
Thread Starter
Ee / Cpe
Joined: Jan 2003
Posts: 2,843
Likes: 2
From: Gaithersburg, MD / WVU
The "hows your idle" thread.
post the info you know about your idle in these catagorys.
idle speed: 1200rpms
idle afr: 12.8-1
idle vacuum: 17inhg
porting: street
intercooler: fmic
turbo type: single
edit: guess i should add ecu..
ECU: Haltech e6k
idle speed: 1200rpms
idle afr: 12.8-1
idle vacuum: 17inhg
porting: street
intercooler: fmic
turbo type: single
edit: guess i should add ecu..
ECU: Haltech e6k
Last edited by XSTransAm; 08-12-04 at 11:20 AM.
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08-12-04 | 01:10 PM
#10
"Challenged" since 1993
Joined: Sep 2002
Posts: 540
Likes: 0
From: Columbus, Oh
idle speed: 1050-1100rpms
idle afr: Unknown
idle vacuum: 14inhg
porting: RX-7 Store stage 2+ (custom)
intercooler: Greddy 2 Row
turbo type: Stock Twins non seq
ECU: Apexi Power FC
Mods in sig:
idle afr: Unknown
idle vacuum: 14inhg
porting: RX-7 Store stage 2+ (custom)
intercooler: Greddy 2 Row
turbo type: Stock Twins non seq
ECU: Apexi Power FC
Mods in sig:
08-12-04 | 04:12 PM
#18
don't race, don't need to
Joined: Oct 2002
Posts: 1,292
Likes: 1
From: Tri-Cities, WA
idle speed: 750 rpm w/no electrical load, 850 rpm with E/L
idle afr: dont know (ECU controlled) (won't presence of air pump circuitry change this too?)
idle vacuum: 17inhg most of time, up to 19 during warm up rpms @1000
porting: stock
intercooler:stock
turbo type: stock twins, ~ 50K miles
ecu: '93 stock
Note: my idle WAS hunting and dying with electrical load on and placing car in gear. Would fluctuate from 750 to ~250 a couple times, then die. Would stop fluctuating if I took it out of gear OR turned off electrical load (ones that affect the E/L sensor). Replacement of clutch switch (the one on top of the clutch pedal, not behind it, which is starter interlock) fixed most of the hunt, replacing the neutral switch on the tranny made it rock solid. Changing the 1-2 switch (manual trans) did nothing to help idle problem...
idle afr: dont know (ECU controlled) (won't presence of air pump circuitry change this too?)
idle vacuum: 17inhg most of time, up to 19 during warm up rpms @1000
porting: stock
intercooler:stock
turbo type: stock twins, ~ 50K miles
ecu: '93 stock
Note: my idle WAS hunting and dying with electrical load on and placing car in gear. Would fluctuate from 750 to ~250 a couple times, then die. Would stop fluctuating if I took it out of gear OR turned off electrical load (ones that affect the E/L sensor). Replacement of clutch switch (the one on top of the clutch pedal, not behind it, which is starter interlock) fixed most of the hunt, replacing the neutral switch on the tranny made it rock solid. Changing the 1-2 switch (manual trans) did nothing to help idle problem...
08-12-04 | 07:09 PM
#19
Stuck in Afghanistan
Joined: Jan 2004
Posts: 331
Likes: 1
From: Fort Campbell
idle speed: 850 rpm
Idle afr: don't know
Idle vacuum: 20inhg
porting: stock
Turbos: stock ~ 50k miles
ecu: pfs pmc
Note also: After idling for long periods of time it flucuates between 150 and 1500. Plus if I have to stop right after getting off of the freeway it kills.
Idle afr: don't know
Idle vacuum: 20inhg
porting: stock
Turbos: stock ~ 50k miles
ecu: pfs pmc
Note also: After idling for long periods of time it flucuates between 150 and 1500. Plus if I have to stop right after getting off of the freeway it kills.
08-12-04 | 08:06 PM
#22
My car has 2 distinct idles. I'm doing a full vacuum hose job to try to fix it (I'm guessing it's a vacuum leak somewhere.
idle speed: 1100 rpm
Idle afr: unknown
Idle vacuum: 17+ in/hg
Intercooler: stock
porting: stock
Turbos: stock twins
ecu: stock '93
idle speed: <500 rpm
Idle afr: unknown
Idle vacuum: 12 in/hg
Intercooler: stock
porting: stock
Turbos: stock twins
ecu: stock '93
One thing that I've noticed is that my idle vacuum is directly correlated with the idle speed. At the 1100 rpm, the vacuum bobs between 17-19 in/hg vacuum. When the idle drops, the vacuum does too. Around 16 in/hg at 1000 rpm, 15 in/hg around 750 rpm, and finally 12 in/hg when the idle settles sub 500 rpm. BTW, the idle doesn't hunt at all, there's a definite high and a definite low, which randomly seems to occur. BTW, this is on a car with 104+k miles on it's original engine.
idle speed: 1100 rpm
Idle afr: unknown
Idle vacuum: 17+ in/hg
Intercooler: stock
porting: stock
Turbos: stock twins
ecu: stock '93
idle speed: <500 rpm
Idle afr: unknown
Idle vacuum: 12 in/hg
Intercooler: stock
porting: stock
Turbos: stock twins
ecu: stock '93
One thing that I've noticed is that my idle vacuum is directly correlated with the idle speed. At the 1100 rpm, the vacuum bobs between 17-19 in/hg vacuum. When the idle drops, the vacuum does too. Around 16 in/hg at 1000 rpm, 15 in/hg around 750 rpm, and finally 12 in/hg when the idle settles sub 500 rpm. BTW, the idle doesn't hunt at all, there's a definite high and a definite low, which randomly seems to occur. BTW, this is on a car with 104+k miles on it's original engine.
08-12-04 | 09:49 PM
#23
Perpetual Rebuilder
Joined: Mar 2002
Posts: 1,250
Likes: 0
From: Seattle, Washington
idle speed: 925 rpms (solid when warm - starts up at 650 rpms and speeds up as it warms)
idle afr: 12.7
idle vacuum: 17inhg ( 15 inhg at 650rpm at start)
porting: stock
intercooler: fmic - 2 row
turbo type: single
ECU: PowerFc
idle afr: 12.7
idle vacuum: 17inhg ( 15 inhg at 650rpm at start)
porting: stock
intercooler: fmic - 2 row
turbo type: single
ECU: PowerFc
