I have a 99 auto 4runner that sometimes has bouts of stalling. Its happened on 2 occasions. When coming to a stop the idle goes very low and it stalls, on restarting I have to keep the accelerator pedal down slightly to keep it going. I temporary increase the idle speed so its drivable, then after a few days it seems to clear. I get no warning of this, the engine warning light is not on. Any ideas would be appreciated.
Stalling 99 4runner
- Thread starter SteelyTim
- Start date
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I've got the same problem
Automatic 2000 4Runner (2wd) would stall every now and then (maybe once or twice a month) at start-up. I'd start it and give it some gas and that usually solved the problem at start-up... it would maintain an idle once the engine was running. Last night it stalled on me while driving home on the freeway. I let off the gas and it just stalled. I pulled off the road and tried to start again... this time it needed gass to keep running. I had to drive braking with my left foot and constantly giving gass with my right foot, to keep the engine running. Still doing the same this morning, so I need to do something about it.
Just looking here to see if anyone has had, and corrected this same problem, but looks like you and I are alone on this one.
Gonna go get a service manual and see if it's something I can tackle... If not, I'll take to a shop and have them diagnoce.
I'll let you know if I have any success.
Automatic 2000 4Runner (2wd) would stall every now and then (maybe once or twice a month) at start-up. I'd start it and give it some gas and that usually solved the problem at start-up... it would maintain an idle once the engine was running. Last night it stalled on me while driving home on the freeway. I let off the gas and it just stalled. I pulled off the road and tried to start again... this time it needed gass to keep running. I had to drive braking with my left foot and constantly giving gass with my right foot, to keep the engine running. Still doing the same this morning, so I need to do something about it.
Just looking here to see if anyone has had, and corrected this same problem, but looks like you and I are alone on this one.
Gonna go get a service manual and see if it's something I can tackle... If not, I'll take to a shop and have them diagnoce.
I'll let you know if I have any success.
el_chapu-bling
New member
I am having the same thing...
Ok,
Here is what is happening to me. I have a 2000 4Runner 2WD, V6, automatic. I bought it last December (had it for about a year). I got it with 64K miles, I have reached 84K this week -- about 20K miles in one year...
On to the issue:
- I first got a CEL last month going up hill to take a freeway onramp. I didn't feel anything different with the truck, just that the CEL light was ON. I took it to a friend for a computer diagnosis; it was the O2 sensor (the "first" one, before the cat)
- I get it fixed. CEL goes away. The next day, the CEL turns back ON again! I take it to my friend once again. It appears to be the MAF sensor. He cleans it, as well as the throttle body. CEL goes away again.
- Two days later, CEL comes back ON. The MAF sensor needs to be replaced. I get it done and the CEL goes away (again).
- Everything is cool for about 3 days, when all of a sudden, the CEL comes ON yet again (for the 4th time, I believe). At this point, the truck feels no different than when I first bought it. It's just that the CEL is bothering me and I want to get it fixed...I keep driving the truck for one more day (it was a Sunday) and on Monday during lunchtime, the CEL simply turns OFF...
- I keep driving the truck with no issues until a couple of days after the CEL turned OFF, I reach a stop light facing downhill. I am just stepping on the brake while on "D" (Overdrive always ON). The truck begins shaking a little bit, as if the engine was losing "pressure", if you will. The light turns green and I accelerate, make a right turn and start going uphill now.
The truck is not accelerating and it feels like it's choking. I press the pedal even further and I start hearing some "popping" sounds coming from the right frong underside of the car (kinda where the O2 sensor is). I release the accelerator and step on it again, wanting to get the car out of that "choke". The truck now starts responding and accelerates very fast. Truck returns to "normal"...
- I take it to my friend again, but this time the computer shows nothing wrong. WTF? He tells me to keep driving the truck to see if it happens again. Keep in mind the CEL has been OFF all the time.
- This same thing happens again a couple of more times. Now it's time for an oil change and I also do the fuel filter change (NOTE that I had done a "tune up" to the truck on the last oil change, 5K miles ago).
- I keep driving the truck thinking this will "solve" things and nothing. The truck did it again, but this time it lasted longer for it to respond. The weird thing is, that it always happens when I am at a stop light facing downhill and have to go uphill after the light goes green. At the stop light the car would shake, RPM start going up and down below 1K similar to when the battery or alternator is bad--Once I start accelerating uphill, the truck does not respond and moves very slowly. The more pressure I apply to the pedal, the harder the truck "chokes" and the more air "popping" sounds I hear.
I am not a mechanically inclined person, so I am just describing things as I feel/hear them. The truck honestly feels like its being blocked of air, like something is being blocked and the car cannot advance. It does not feel like transmission/engaging problems (I have a Mustang where I had that problem, not the same) nor like engine internal issues. I really hope it's something very simple or something just got stuck in the Air ducts.
I want this fixed! I have been losing a lot of time and money now trying to get this out of the way for the past month. I am sure somebody has had the same problem I do! Please help!
I thought 4Runners were "indestructible" and very reliable as I have been told by 99% of the people I talked to before buying mine. I have a limited power-train warranty from the dealer until I reach 100K miles, but I doubt they cover stuff like this. Plus, they charge an arm and a leg just for "diagnosing", and if my friends computer did not come up with anything, I doubt the dealership will be able to tell me otherwise...
Thanks. This is my first post here. I registered to post this.
Ok,
Here is what is happening to me. I have a 2000 4Runner 2WD, V6, automatic. I bought it last December (had it for about a year). I got it with 64K miles, I have reached 84K this week -- about 20K miles in one year...
On to the issue:
- I first got a CEL last month going up hill to take a freeway onramp. I didn't feel anything different with the truck, just that the CEL light was ON. I took it to a friend for a computer diagnosis; it was the O2 sensor (the "first" one, before the cat)
- I get it fixed. CEL goes away. The next day, the CEL turns back ON again! I take it to my friend once again. It appears to be the MAF sensor. He cleans it, as well as the throttle body. CEL goes away again.
- Two days later, CEL comes back ON. The MAF sensor needs to be replaced. I get it done and the CEL goes away (again).
- Everything is cool for about 3 days, when all of a sudden, the CEL comes ON yet again (for the 4th time, I believe). At this point, the truck feels no different than when I first bought it. It's just that the CEL is bothering me and I want to get it fixed...I keep driving the truck for one more day (it was a Sunday) and on Monday during lunchtime, the CEL simply turns OFF...
- I keep driving the truck with no issues until a couple of days after the CEL turned OFF, I reach a stop light facing downhill. I am just stepping on the brake while on "D" (Overdrive always ON). The truck begins shaking a little bit, as if the engine was losing "pressure", if you will. The light turns green and I accelerate, make a right turn and start going uphill now.
The truck is not accelerating and it feels like it's choking. I press the pedal even further and I start hearing some "popping" sounds coming from the right frong underside of the car (kinda where the O2 sensor is). I release the accelerator and step on it again, wanting to get the car out of that "choke". The truck now starts responding and accelerates very fast. Truck returns to "normal"...
- I take it to my friend again, but this time the computer shows nothing wrong. WTF? He tells me to keep driving the truck to see if it happens again. Keep in mind the CEL has been OFF all the time.
- This same thing happens again a couple of more times. Now it's time for an oil change and I also do the fuel filter change (NOTE that I had done a "tune up" to the truck on the last oil change, 5K miles ago).
- I keep driving the truck thinking this will "solve" things and nothing. The truck did it again, but this time it lasted longer for it to respond. The weird thing is, that it always happens when I am at a stop light facing downhill and have to go uphill after the light goes green. At the stop light the car would shake, RPM start going up and down below 1K similar to when the battery or alternator is bad--Once I start accelerating uphill, the truck does not respond and moves very slowly. The more pressure I apply to the pedal, the harder the truck "chokes" and the more air "popping" sounds I hear.
I am not a mechanically inclined person, so I am just describing things as I feel/hear them. The truck honestly feels like its being blocked of air, like something is being blocked and the car cannot advance. It does not feel like transmission/engaging problems (I have a Mustang where I had that problem, not the same) nor like engine internal issues. I really hope it's something very simple or something just got stuck in the Air ducts.
I want this fixed! I have been losing a lot of time and money now trying to get this out of the way for the past month. I am sure somebody has had the same problem I do! Please help!
I thought 4Runners were "indestructible" and very reliable as I have been told by 99% of the people I talked to before buying mine. I have a limited power-train warranty from the dealer until I reach 100K miles, but I doubt they cover stuff like this. Plus, they charge an arm and a leg just for "diagnosing", and if my friends computer did not come up with anything, I doubt the dealership will be able to tell me otherwise...
Thanks. This is my first post here. I registered to post this.
skittlesRgood
New member
chapu-bling: i do not have a 4runner but i had a very similar problem with my van. found out my spark plug cables were a little melted, replaced and problem was gone. have ur friend take a look or take it in to a shop. hope that helps.
el_chapu-bling
New member
Thanks!
That's one more thing I can try. It should not be that expensive to do. Thanks for the tip.
That's one more thing I can try. It should not be that expensive to do. Thanks for the tip.
Unfortuantely, driveability issues like this are hard to diagnose.....especially intermittent driveability issues. Here is something you can do really cheap that may or may not help. Clean out the throttle body, and make sure the IAC(idle air control valve) passages are clean. (small hole in front of throttle plate, and behind it.) This allows the truck to idle when the throttle is closed. Air gets to the engine through this little passage bypassing the closed throttle plate. It builds up with carbon, and sometimes will require replacement of the IAC valve itself.
It can also be fuel delivery, or ignition related problems.....but the IAC and TB cleaning is a good place to start.
Hope that helps, Jason.
It can also be fuel delivery, or ignition related problems.....but the IAC and TB cleaning is a good place to start.
Hope that helps, Jason.
enraeh
New member
My problem may be related to this thread:
About 1.5 years ago my CEL came on, but ran fine with no noticable change in mileage so I procrastinated getting it fixed for about a year(lazy I am). A few months ago the T4R was due for a timing belt etc so I asked the dealershp to diagnose and fix the CEL at the same time. OK fine pickup the car and driving home 15 miles or so the CEL comes on again. Call the service dept, take it back in 2nd time, O2 sensor. This time light stays off for about a week and comes back on again! WTF indeed! Frustrated I give up and figure if I write to Toyota mabey they can resolve the problem. A few days later need some gas so I pull in and in a hurry I didn't look and filled with premium octane, costs about $1.50 per tank more then regular so I stay cool and forget about it. Then about 5 miles after filling up the CEL goes off and hasn't come back on since. Since I've been using premium gas, that is!
I checked the manual for octane reccomended and it says: 87 (91 research) and the gas pumps say regular=87,premium=91. All this time I thought there was little or no difference in octanes but I was wrong, using premium has made a difference.
About 1.5 years ago my CEL came on, but ran fine with no noticable change in mileage so I procrastinated getting it fixed for about a year(lazy I am). A few months ago the T4R was due for a timing belt etc so I asked the dealershp to diagnose and fix the CEL at the same time. OK fine pickup the car and driving home 15 miles or so the CEL comes on again. Call the service dept, take it back in 2nd time, O2 sensor. This time light stays off for about a week and comes back on again! WTF indeed! Frustrated I give up and figure if I write to Toyota mabey they can resolve the problem. A few days later need some gas so I pull in and in a hurry I didn't look and filled with premium octane, costs about $1.50 per tank more then regular so I stay cool and forget about it. Then about 5 miles after filling up the CEL goes off and hasn't come back on since. Since I've been using premium gas, that is!
I checked the manual for octane reccomended and it says: 87 (91 research) and the gas pumps say regular=87,premium=91. All this time I thought there was little or no difference in octanes but I was wrong, using premium has made a difference.
imagemaker
New member
Im having a very similar problem. Mine occurs just before it hits normal running temp. If you stop and restart it goes away. Did you find a solution?
imagemaker
New member
Acting like its fuel starved...
I have a similar issue. 2000 4runner 3.4R
Replaced air box,(potential stripped screw on the MAS) replaced MAS, Replaced TPS, replaced IAC, Replaced ECT, Replaced brake booster ( as per Dealer diagnosis) , checked vacuum lines for breaks. New plugs. No codes. Been to 4 shops, all the incorrect diagnosis. The problem is exactly the same and has not presented itself differently after each repair.
Runs fine on start up. As it approaches normal operating pressure, it will seem to lose power. If you come to a stop and accelerate it bogs down, back fires through the air box. Does the same thing if restarted after 30 minutes. When the issue occurs , if you pull over and restart the vehicle it will return to normal operation. Shooting in the dark now. Fuel filter next....
I have a similar issue. 2000 4runner 3.4R
Replaced air box,(potential stripped screw on the MAS) replaced MAS, Replaced TPS, replaced IAC, Replaced ECT, Replaced brake booster ( as per Dealer diagnosis) , checked vacuum lines for breaks. New plugs. No codes. Been to 4 shops, all the incorrect diagnosis. The problem is exactly the same and has not presented itself differently after each repair.
Runs fine on start up. As it approaches normal operating pressure, it will seem to lose power. If you come to a stop and accelerate it bogs down, back fires through the air box. Does the same thing if restarted after 30 minutes. When the issue occurs , if you pull over and restart the vehicle it will return to normal operation. Shooting in the dark now. Fuel filter next....
I have the exact same problem on my 99. I have replaced the IAC, O2 sensor, fuel pump and fuel filter upon shop recommendations. The stall problem persists on warm days waiting at the light shortly after getting off the highway. No stall on cool days.
The MAF sensor along with TB have been cleaned as well. Plug wires along with plugs have been inspected by the shop.
No codes yet.
The transmission has been checked, no problems.
I have tried multiple grades of fuel, stall still persists.
Open to ideas on how to get this resolved.
The MAF sensor along with TB have been cleaned as well. Plug wires along with plugs have been inspected by the shop.
No codes yet.
The transmission has been checked, no problems.
I have tried multiple grades of fuel, stall still persists.
Open to ideas on how to get this resolved.