92' n/a HIGH IDLE????

xCronosx1125 · 08-20-2007, 04:47 AM

Im new to the mr2 community and i recently bought a '92 n/a(5sfe)5speed: $1900 w/ 128k miles. everything seemed ok, except for the High Idle and other cosmetic blems. i was wondering if anyone has any advice on this and if this is a serious problem (serious as in i should stop driving it temporarily until its fixed?)

JRS_MisterTwo · 08-20-2007, 07:55 AM

Welcome. So what is your idling speed?

nnamssorxela · 08-20-2007, 08:38 AM

Is your car in good condition (what sort of cosmetic blemishes?). I'm looking to buy a 91 N/a but for $5,500!! But back on topic, the high idle shouldnt be too serious,...how high is it though?

xCronosx1125 · 08-20-2007, 09:17 AM

when i just start it up, its around 2k but it drops anywhere in between 1500-2000. and when i let it idle for a little, it starts to drop to around 1300 but then shoots back up. its like it "bounces" around.

xCronosx1125 · 08-20-2007, 09:21 AM

oh and the car is in "ok" condition. SALVAGE is the problem.... and the reason for the cheap price. other than the idle problem, it seemed to be good. the damage was in the front of the car.

nnamssorxela · 08-20-2007, 11:03 AM

ah I see, ....my honda does that, it's an O2 sensor but I forget which one it is, it could also be a number of things maf, ecu, etc...but thats experience from other cars, not mr2's
-Alex

albertgunit101 · 08-20-2007, 12:33 PM

you can try and adjust the idle. at the top of the intake manifold there is a flat head screw you can turn to adjust it. it is pluged by a round black cover sitting on top of the intake manifold. or check your spark plugs. and like they say check your o2 sensor.

xCronosx1125 · 08-20-2007, 07:28 PM

will inspect sensors and screw asap. THANKS for the info! ill check back after inspection.

[add] please let me know if you have any other info about this!

albertgunit101 · 08-20-2007, 07:33 PM

its also at the BGB on how to adjust it.

xCronosx1125 · 08-20-2007, 08:49 PM

sorry, whats the BGB!?

Gairloch · 08-20-2007, 09:06 PM

BGB = Big Green Book. The factory service manual. There is a copy of it online. I'd give you the link but I'm firewalled away from it right now.

This is a really common issue with the 5sfe and if you do a little digging you will find more information than you can shake a stick at. Adjusting your idle screw might bring your idle down a little but the issue is almost always air getting in where it's not supposed to. This can be from a variety of places:

1. Vacuum port open or damaged vacuum line.
2. Problem with your ISCV (Idle Speed Control Valve, in the throttle body)
3. Butterfly plate in the throttle body not mating well anymore.
4. Throttle stop or idle screw maladjusted.

That works for a start and there are ways to check each issue.

Something else that is a possiblity, but less likely, is that your timing is advanced a little.

TomsMR2 · 08-20-2007, 10:35 PM

ill see what i can do about getting a sticky put together. theres unfortunately a lot of little things that can make it high idle, and its almost always a nightmare to fully fix.

CyFi · 08-21-2007, 01:16 AM

just ignore it

JRS_MisterTwo · 08-21-2007, 05:17 AM

My 5sfe idles as high as 1.5k on first start, but then slowly makes its way down to 750 rpm. Is this the same for all of you, or do I have some adjusting to do?

albertgunit101 · 08-21-2007, 10:55 AM

on first start im sure that is normal since its still cold. mine is the same. but mine is almost at 1.5 at first start, maybe coz i have straight flow exhaust. and then it will go down. mine is not exactly at 750 though, the needle is a little bit on top of it. so im guessing its around 800-900 or so.

nnamssorxela · 08-21-2007, 04:11 PM

some cars have a quick warm up built into them (i think it was originally designed to warm up turbo?) but my bro's old rx7 did it for a little bit, but you could stop it be putting it in drive or hitting gas (it was an auto). I forget though, and I could be completely wrong
-Alex

TomsMR2 · 08-21-2007, 07:40 PM

all cars high idle when they're cold. if your car didnt, you'd have some serious problems.

if your car idles under 1K rpm, i really really suggest you dont worry about it, thats perfectly within spec.

CyFi · 08-21-2007, 08:33 PM

Quote:

Originally Posted by TomsMR2

all cars high idle when they're cold. if your car didnt, you'd have some serious problems.

if your car idles under 1K rpm, i really really suggest you dont worry about it, thats perfectly within spec.

my friends car on cold startup will rev up to 1.5k and then after like a couple seconds will go below 1k

TomsMR2 · 08-21-2007, 10:33 PM

all cars do. some just do it for longer/shorter than others.

ThorOtheBIG · 08-23-2007, 06:29 AM

My Dos also idles around 1,300-1,500. I replaced the EGR valve and it actually lowered it from the original 1,500 to 1,300. That idle screw on the throttle is as tight as can be. But, I wouldn't worry about it. Who cares? It really doesn't make a difference to me, since I have been driving it like that for 2 years. And I might mention I deliver pizzas! So take it from me, unless you are super anal retentive, don't worry about it.

08-20-2007, 04:47 AM	#1 (permalink)
xCronosx1125 SW20sucka Join Date: Aug 2007 Location: CA Posts: 32 Thanks: 5 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	92' n/a HIGH IDLE???? Im new to the mr2 community and i recently bought a '92 n/a(5sfe)5speed: $1900 w/ 128k miles. everything seemed ok, except for the High Idle and other cosmetic blems. i was wondering if anyone has any advice on this and if this is a serious problem (serious as in i should stop driving it temporarily until its fixed?)

08-20-2007, 09:06 PM	#11 (permalink)
Gairloch Dreaming of apexes Join Date: Aug 2005 Location: Minneapolis, MN Posts: 4,472 Thanks: 115 Thanked 223 Times in 196 Posts My Google Map iTrader Rating: (7/100% )	BGB = Big Green Book. The factory service manual. There is a copy of it online. I'd give you the link but I'm firewalled away from it right now. This is a really common issue with the 5sfe and if you do a little digging you will find more information than you can shake a stick at. Adjusting your idle screw might bring your idle down a little but the issue is almost always air getting in where it's not supposed to. This can be from a variety of places: 1. Vacuum port open or damaged vacuum line. 2. Problem with your ISCV (Idle Speed Control Valve, in the throttle body) 3. Butterfly plate in the throttle body not mating well anymore. 4. Throttle stop or idle screw maladjusted. That works for a start and there are ways to check each issue. Something else that is a possiblity, but less likely, is that your timing is advanced a little. __________________ "Inside the car, the world beyond the driver's immediate horizon ceases to exist. Alone with the solitude of his desire, survival sense numbed by the speed, he's outrun the mediocrity of the outside world, slipped the shackles it tries to clamp on us all. He is running free, chased only by a fear of failure, for failure is to risk ejection into the real world." ~Mark Hughes

08-20-2007, 07:55 AM	#2 (permalink)
JRS_MisterTwo Cage Fighter Join Date: Jul 2007 Posts: 125 Thanks: 9 Thanked 0 Times in 0 Posts My Google Map iTrader Rating: (0/0% )	Welcome. So what is your idling speed?

08-20-2007, 08:38 AM	#3 (permalink)
nnamssorxela Cage Fighter Join Date: Aug 2007 Location: Charleston, South Carolina Posts: 112 Thanks: 0 Thanked 2 Times in 2 Posts iTrader Rating: (0/0% )	Is your car in good condition (what sort of cosmetic blemishes?). I'm looking to buy a 91 N/a but for $5,500!! But back on topic, the high idle shouldnt be too serious,...how high is it though?

08-20-2007, 09:17 AM	#4 (permalink)
xCronosx1125 SW20sucka Join Date: Aug 2007 Location: CA Posts: 32 Thanks: 5 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	when i just start it up, its around 2k but it drops anywhere in between 1500-2000. and when i let it idle for a little, it starts to drop to around 1300 but then shoots back up. its like it "bounces" around.

08-20-2007, 09:21 AM	#5 (permalink)
xCronosx1125 SW20sucka Join Date: Aug 2007 Location: CA Posts: 32 Thanks: 5 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	oh and the car is in "ok" condition. SALVAGE is the problem.... and the reason for the cheap price. other than the idle problem, it seemed to be good. the damage was in the front of the car.

08-20-2007, 11:03 AM	#6 (permalink)
nnamssorxela Cage Fighter Join Date: Aug 2007 Location: Charleston, South Carolina Posts: 112 Thanks: 0 Thanked 2 Times in 2 Posts iTrader Rating: (0/0% )	ah I see, ....my honda does that, it's an O2 sensor but I forget which one it is, it could also be a number of things maf, ecu, etc...but thats experience from other cars, not mr2's -Alex

08-20-2007, 12:33 PM	#7 (permalink)
albertgunit101 Cage Fighter Join Date: May 2007 Location: springfield illinois Posts: 892 Thanks: 74 Thanked 18 Times in 18 Posts iTrader Rating: (12/100% )	you can try and adjust the idle. at the top of the intake manifold there is a flat head screw you can turn to adjust it. it is pluged by a round black cover sitting on top of the intake manifold. or check your spark plugs. and like they say check your o2 sensor.

08-20-2007, 07:28 PM	#8 (permalink)
xCronosx1125 SW20sucka Join Date: Aug 2007 Location: CA Posts: 32 Thanks: 5 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	will inspect sensors and screw asap. THANKS for the info! ill check back after inspection. [add] please let me know if you have any other info about this!

08-20-2007, 07:33 PM	#9 (permalink)
albertgunit101 Cage Fighter Join Date: May 2007 Location: springfield illinois Posts: 892 Thanks: 74 Thanked 18 Times in 18 Posts iTrader Rating: (12/100% )	its also at the BGB on how to adjust it.

08-20-2007, 08:49 PM	#10 (permalink)
xCronosx1125 SW20sucka Join Date: Aug 2007 Location: CA Posts: 32 Thanks: 5 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	sorry, whats the BGB!?

08-20-2007, 10:35 PM	#12 (permalink)
TomsMR2 Formerly Tom Brokaw Join Date: Feb 2005 Location: Bay Area Posts: 2,138 Thanks: 8 Thanked 165 Times in 138 Posts Blog Entries: 1 iTrader Rating: (0/0% )	ill see what i can do about getting a sticky put together. theres unfortunately a lot of little things that can make it high idle, and its almost always a nightmare to fully fix.

08-21-2007, 01:16 AM	#13 (permalink)
CyFi ShamWOW! Join Date: Oct 2005 Posts: 1,390 Thanks: 12 Thanked 38 Times in 35 Posts iTrader Rating: (10/100% )	just ignore it

08-21-2007, 05:17 AM	#14 (permalink)
JRS_MisterTwo Cage Fighter Join Date: Jul 2007 Posts: 125 Thanks: 9 Thanked 0 Times in 0 Posts My Google Map iTrader Rating: (0/0% )	My 5sfe idles as high as 1.5k on first start, but then slowly makes its way down to 750 rpm. Is this the same for all of you, or do I have some adjusting to do?

08-21-2007, 10:55 AM	#15 (permalink)
albertgunit101 Cage Fighter Join Date: May 2007 Location: springfield illinois Posts: 892 Thanks: 74 Thanked 18 Times in 18 Posts iTrader Rating: (12/100% )	on first start im sure that is normal since its still cold. mine is the same. but mine is almost at 1.5 at first start, maybe coz i have straight flow exhaust. and then it will go down. mine is not exactly at 750 though, the needle is a little bit on top of it. so im guessing its around 800-900 or so.

08-21-2007, 04:11 PM	#16 (permalink)
nnamssorxela Cage Fighter Join Date: Aug 2007 Location: Charleston, South Carolina Posts: 112 Thanks: 0 Thanked 2 Times in 2 Posts iTrader Rating: (0/0% )	some cars have a quick warm up built into them (i think it was originally designed to warm up turbo?) but my bro's old rx7 did it for a little bit, but you could stop it be putting it in drive or hitting gas (it was an auto). I forget though, and I could be completely wrong -Alex

08-21-2007, 07:40 PM	#17 (permalink)
TomsMR2 Formerly Tom Brokaw Join Date: Feb 2005 Location: Bay Area Posts: 2,138 Thanks: 8 Thanked 165 Times in 138 Posts Blog Entries: 1 iTrader Rating: (0/0% )	all cars high idle when they're cold. if your car didnt, you'd have some serious problems. if your car idles under 1K rpm, i really really suggest you dont worry about it, thats perfectly within spec.

08-21-2007, 10:33 PM	#19 (permalink)
TomsMR2 Formerly Tom Brokaw Join Date: Feb 2005 Location: Bay Area Posts: 2,138 Thanks: 8 Thanked 165 Times in 138 Posts Blog Entries: 1 iTrader Rating: (0/0% )	all cars do. some just do it for longer/shorter than others.

08-23-2007, 06:29 AM	#20 (permalink)
ThorOtheBIG No Skills Join Date: Aug 2005 Posts: 56 Thanks: 3 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	My Dos also idles around 1,300-1,500. I replaced the EGR valve and it actually lowered it from the original 1,500 to 1,300. That idle screw on the throttle is as tight as can be. But, I wouldn't worry about it. Who cares? It really doesn't make a difference to me, since I have been driving it like that for 2 years. And I might mention I deliver pizzas! So take it from me, unless you are super anal retentive, don't worry about it.