Rough Idle

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Rough Idle #1029462 06/01/11 04:15 AM

Joined: Jun 2010

Posts: 70

N.C.

Brimt

Getting the Wheeling Fever

My 22re has started surging while at idle speed. The engine remains at a perfect idle until you press the brake pedal. It only happens when the engine is operating temperature. As soon as you take your foot off the pedal the idling goes back to normal. Does anyone know what this might be?

Thanks guys

Big T

Re: Rough Idle [Re: Brimt] #1029463 06/01/11 05:01 AM

Joined: Oct 2002

Posts: 15,887

Fairbanks, Alaska

kewlynx

Toyota & Classifieds Moderator

22RE's do not like having low coolant. Make sure that's topped off.

Are you running the AC with this? Turn the AC off and see if you still have the problem. If it goes away, your idle for your AC might be a little low.

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Re: Rough Idle [Re: kewlynx] #1029464 06/02/11 04:42 AM

Joined: Jun 2010

Posts: 70

N.C.

Brimt

Getting the Wheeling Fever

My truck doesnt have AC. I checked the coolant level and its full. Any other ideas? Thought it may be something to do with vacuum issues, but i dont know. Any ideas would be great.

Thanks

Big T

Re: Rough Idle [Re: Brimt] #1029465 06/02/11 09:05 AM

Joined: May 2009

Posts: 177

Woodland, Ca.

Ralph

Wheeler

How about the brake booster?

Are you using brake fluid?

Ralph

1991 Toyota 4x4 Standard Cab Pickup.
engnbldr cam and head.
Doug Thorley Headers
Home Made Cat Backs
30x9.5x15 BF Goodrich All-Terrain M/T KM2

Re: Rough Idle [Re: Brimt] #1029466 06/02/11 05:37 PM

Joined: Jan 2000

Posts: 12,153

N. California. USA

4Crawler

Web Wheeler

Quote

Idle speed is likely too high:
- http://www.4crawler.com/4x4/TLCA_TruckTech/TruckTech.04.09.html

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

Re: Rough Idle [Re: Ralph] #1029467 06/03/11 02:51 AM

Joined: Jun 2010

Posts: 70

N.C.

Brimt

Getting the Wheeling Fever

Just checked to see if i was out of fluid, but its full.

Any other ideas?

Thanks for the ideas so far!!

Big T

Re: Rough Idle [Re: Brimt] #1029468 06/03/11 03:31 AM

Joined: Jan 2000

Posts: 12,153

N. California. USA

4Crawler

Web Wheeler

Quote

Just checked to see if i was out of fluid, but its full.

Any other ideas?

Thanks for the ideas so far!!

As noted above, idle speed is too high. I can exactly duplicate that issue if I turn my idle speed up to 1000-1100, then hitting the brake causes the loping idle. Turn the idle back down around 800 and all is fine. Also, check the TPS idle setting:
- http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

You can rule out the brake booster by plugging the vacuum line to the booster temporarily and if the problem remains, it is not the booster, but if the problem vanishes, it is likely a vacuum leak in the booster.

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