Bizzare Idle Problem with a twist
Dec 1, 2006 | 12:53 PM
#1
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Bizzare Idle Problem with a twist
Hey guys, I've heard of a bizzare idling problem plaging vehicles like mine (91 4runner) running a 22RE and sometimes the V6 as well. What I've heard hapens is that the idle fluctuates up and down and sometimes dies between like 400 - 650. That was originally happening to my 4 runner about 4 months ago and only did it when the car was warmed up and with my foot on the brake. It went away after I took out my thermostat due to an overheating episode..
Well it got cold and I was tired of not having any heat in my car so I replaced the thermostat. Well the bizzare idle problem is back but it's mutated. It still only does it when the truck is warmed up. But now it just won't Idle. I have to keep my foot partially on the gas which is pretty tough with a 5speed.
The thing that makes this a little different is that I can hear a definate click from under the dash and maybe on the engine side of the firewall. It sounds like it could be a click from a switch being triggered off and on. If I take my foot off of the gas I hear the click and that's when the engine just stops getting fuel and dies. As soon as I put my foot on the gas I hear the click again and the engine gets fuel again. any ideas?
-Thanks
Tom
Well it got cold and I was tired of not having any heat in my car so I replaced the thermostat. Well the bizzare idle problem is back but it's mutated. It still only does it when the truck is warmed up. But now it just won't Idle. I have to keep my foot partially on the gas which is pretty tough with a 5speed.
The thing that makes this a little different is that I can hear a definate click from under the dash and maybe on the engine side of the firewall. It sounds like it could be a click from a switch being triggered off and on. If I take my foot off of the gas I hear the click and that's when the engine just stops getting fuel and dies. As soon as I put my foot on the gas I hear the click again and the engine gets fuel again. any ideas?
-Thanks
Tom
Dec 1, 2006 | 01:59 PM
#2
Registered User
Joined: Aug 2002
Posts: 533
Likes: 1
From: WA
Hey guys, I've heard of a bizzare idling problem plaging vehicles like mine (91 4runner) running a 22RE and sometimes the V6 as well. What I've heard hapens is that the idle fluctuates up and down and sometimes dies between like 400 - 650. That was originally happening to my 4 runner about 4 months ago and only did it when the car was warmed up and with my foot on the brake. It went away after I took out my thermostat due to an overheating episode..
Well it got cold and I was tired of not having any heat in my car so I replaced the thermostat. Well the bizzare idle problem is back but it's mutated. It still only does it when the truck is warmed up. But now it just won't Idle. I have to keep my foot partially on the gas which is pretty tough with a 5speed.
The thing that makes this a little different is that I can hear a definate click from under the dash and maybe on the engine side of the firewall. It sounds like it could be a click from a switch being triggered off and on. If I take my foot off of the gas I hear the click and that's when the engine just stops getting fuel and dies. As soon as I put my foot on the gas I hear the click again and the engine gets fuel again. any ideas?
-Thanks
Tom
Well it got cold and I was tired of not having any heat in my car so I replaced the thermostat. Well the bizzare idle problem is back but it's mutated. It still only does it when the truck is warmed up. But now it just won't Idle. I have to keep my foot partially on the gas which is pretty tough with a 5speed.
The thing that makes this a little different is that I can hear a definate click from under the dash and maybe on the engine side of the firewall. It sounds like it could be a click from a switch being triggered off and on. If I take my foot off of the gas I hear the click and that's when the engine just stops getting fuel and dies. As soon as I put my foot on the gas I hear the click again and the engine gets fuel again. any ideas?
-Thanks
Tom
Dec 1, 2006 | 02:25 PM
#3
Air flow meter turns the fuel pump on and off:
- http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml
Make sure coolant is topped off, no air pockets, that can cause the ECU temp sender to see hot/cold as the air pocket hits the temp sender.
And turn the idle speed down if too high:
- http://www.4crawler.com/4x4/TLCA_Tru...ech.04.09.html
- http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml
Make sure coolant is topped off, no air pockets, that can cause the ECU temp sender to see hot/cold as the air pocket hits the temp sender.
And turn the idle speed down if too high:
- http://www.4crawler.com/4x4/TLCA_Tru...ech.04.09.html
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