cant set idle low enough

4x4Wire Trail Talk Forums: Jeep, Toyota, Mitsubishi, Pajero, Isuzu, Kia, 4WD, 4x4, SUV, Off-Road and OutdoorWire Forums

Print Thread

Rate Thread

cant set idle low enough #696842 02/15/06 05:59 AM

Joined: Oct 2004

Posts: 1,270

Long Island, NY

willzrunna96 Offline

Body Damage is Cool

Good evening fellas...i cant get my truck to idle smoothly below 1000 rpms. i used to be able to get it smootlhy at 750 but no longer can. once i go below 1000 rpms it wants to die and starts breaking up. Ive burped the coolant. The problem started a while ago since i had to swap a lower intake on it. ever since the it idled rough when it was fully warmed up. there are no leaks at the manifold and the vaccuum lines are oriented correctly

91 pickup 5.29's US GEAR.35x 12.50 trxus m/t.5 speed swap- SOLD!
96 4Runna limited-toytec/OME lift,diff drop Nitto 285/75/16 Elocked=butter
07 FJ cruiser 3" DR coilovers 285/75/16 nitto TG. allpro sliders

Re: cant set idle low enough [Re: willzrunna96] #696843 02/15/06 06:15 AM

Joined: Jan 2000

Posts: 12,153

N. California. USA

4Crawler

Web Wheeler

Have you tested the Throttle Position Sensor IDLe setting?

r.c.brown@ieee.org
TruckEditor@tlca.org
Project: 4Crawler
4Crawler OffRoad - 4x4Wire discount code

Re: cant set idle low enough [Re: 4Crawler] #696844 02/15/06 06:21 AM

Joined: Oct 2004

Posts: 1,270

Long Island, NY

willzrunna96 Offline

Body Damage is Cool

havent tested it yet but i know the idle goes down when i jump th te1 and e1 but that doesnt mean that cant be out of adjustment correct

Re: cant set idle low enough [Re: willzrunna96] #696845 02/15/06 08:23 PM

Joined: Jan 2004

Posts: 299

Fairview, Oregon

indy

Mudrunner

Jumpering the connectors just tells the computer to go to default timing. Are you able to get the default timing set with the connector jumpered? If not, that's another clue pointing to the TPS. Follow Roger's write up very carefully and don't skip any of his steps.

Good Luck,
Indy

Re: cant set idle low enough [Re: indy] #696846 02/16/06 12:21 AM

Joined: Oct 2004

Posts: 1,270

Long Island, NY

willzrunna96 Offline

Body Damage is Cool

well i swapped throttle bodies today. and it still does the same thing. but now i noticed at slight throttle you can hear the air rushing in the air flow meter then when you release the throttle you here a a sucking sound like vacuum then the idle goes down. i also have to push the butterfly a tiny bit more and the the idle goes down further. ive adjusted the dashpot and its not sticking. anyone know what would cause this. i looked at the plugs and the ground is white but the electrode it brownish white with no wear on it.

Re: cant set idle low enough [Re: willzrunna96] #696847 02/16/06 12:49 AM

Anonymous

Unregistered

I would be leaning toward TPS adjustment. It might have been 'out' on the new TB, as well.

Mike in AR

Re: cant set idle low enough #696848 02/16/06 04:09 PM

Joined: Oct 2004

Posts: 6,332

In the beer cooler

52degrees

Trail Leader

I'd look for a vacuum leak too. Use a can of carb cleaner if you don't have a propane enrichment tool.

Clay

1990 Montero RS (In pieces... for now)

KG6VNX

Re: cant set idle low enough [Re: 52degrees] #696849 02/16/06 06:54 PM

Joined: Jan 2006

Posts: 15

scogind

Need a Spot

I just got mine out of the shop yesterday and it was doing the same thing. Idled way too fast after it warmed up. The mechanic put the throttle cable back on too tight and the spring wasn't able to completely close the throttle. I could idle it down by manually twisting it closed at the throttle. I loosened the cable just a bit and that gave it enough slack to close completely.

Moderated by 4Crawler, 4x4Wire, kewlynx

Hop To

4x4Wire Social: