07-07-2011, 06:08 AM
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#1
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Junior Member
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Engine runs on after turning ignition off?
After driving my 2000 4-Runner I turned the key to the off position, only the engine did not turn off? It made like a cranking run-on noise? After turning the ignition on and off several times it finally turned the engine off.
After 10 minutes I went to start it up and it was fine?
Any thoughts on what the problem was and what, if anything, should I do?
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07-07-2011, 11:03 AM
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#3
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Are you running Regular or Mid grade gas??? Should be Mid Grade.
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2002 SR5 4x4, Dorado Gold
Suspension:Front:Toytec Coilovers w/ 5100 Bilsteins/RevTek Diff Drop, 231mm Tundra Brake upgrade. Rear: ToyTec Superflex coils/5100 Bilsteins.
Tires: 285/75/16 Bridgestone REVO 2's
The Rest:I.S.R. Mod upgraded to an Injen intake, Borla XR-1 muffler, ARB Bumper, Shrockwork's Rock Sliders, CBI Rear Bumper and a pair of Hellas. Plus a whole bunch of other accessories.Topped off with Zaino's Polish.
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07-07-2011, 11:51 AM
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#4
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Quote:
Originally Posted by ALBPM
Are you running Regular or Mid grade gas??? Should be Mid Grade.
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I run Regular and have Zero issues with runabilty. This is just my opinion but if you are running Midgrade on a normally aspirated 4runner, your wasting your money.
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1999 Limited 4runner in Silver - 9th and 10th Injected TRD Supercharged 4.7 2UZ-FE swap - AISIN Manual hub lockers - Retrofitted E-locker - Downey Off road Coilovers & adjustable Pan Hard Bar - Whelen PA - 2" Personally made Body Lift - Eclipse Navigation Radio - Spider Trax - Custom Hidden Winch - Triple Electric Fans - Running boards off then back on again - Ghetto Cold Air Intake - Sequoia Brakes - V8 Badge (for extra horse power)
2002 SR5 Tacoma Extended Cab also in Silver On 37's and Guns for sale
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07-07-2011, 11:56 AM
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#5
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I've had that happen to me and it was a vacuum leak, but yours sounds a little different. Id check though..
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2005 Limited V8 4x4 4Runner
2005 SR5 V8 4Runner
1997 40th Anniversary FZJ80
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07-07-2011, 12:11 PM
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#6
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Because these engines are fuel injected, if they continue to run after the key is turned off, you would have to have a leaking injector(s).
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07-07-2011, 01:08 PM
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#7
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Quote:
Originally Posted by NTORACN
Because these engines are fuel injected, if they continue to run after the key is turned off, you would have to have a leaking injector(s).
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hmmm I donno about that one. Try pulling the PCV hose off and turning your engine off, it will diesel for a while.
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2005 Limited V8 4x4 4Runner
2005 SR5 V8 4Runner
1997 40th Anniversary FZJ80
2001 Ford F350 w/ FWC Hawk
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07-07-2011, 01:15 PM
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#8
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Quote:
Originally Posted by ALBPM
Are you running Regular or Mid grade gas??? Should be Mid Grade.
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You should not be running mid grade, you run regular if its N/A and premium if its supercharged!
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07-07-2011, 04:12 PM
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#9
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Sounds like you have a case of "Engine Dieseling"
The engine keeps running for a short time after being turned off, due to fuel igniting without a spark.
It's named dieseling because it is similar to how a diesel engines operate by firing the fuel without a spark.
You might have a leaky injector and some carbon buildup in the combustion chamber.
Run some Seafoam thru it
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01 SR5 - 187k+/- 285 BFG A/T KO2 - 99 talls & front Trekmasters / Rear KYB - Hella fogs - Taco Mod - Fixed gaping hole in frame {SOLD}
02 Taco - 197k +/- BFG A/T KO2 285s + rims from 4Runner - saving up for suspension - House gets priority over Taco (for now)
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07-07-2011, 05:02 PM
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#10
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Another very effective fuel system cleaner not mentioned is Gumout Regane.
Quote:
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Originally Posted by Singtoe
I run Regular and have Zero issues with runabilty. This is just my opinion but if you are running Midgrade on a normally aspirated 4runner, your wasting your money.
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Quote:
Originally Posted by JohnsD90
You should not be running mid grade, you run regular if its N/A and premium if its supercharged!
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Regular, mid grade, and premium are ambiguous terms because octane rating varies with geographic location, elevation, etc.
I've noticed low RPM ping (detonation) with "regular" (85 oct. here) so I run "mid grade" or "premium" (87, 91) and the low RPM issue goes away. With the decent torque of the 3.4, I tend to shift early keeping the revs to a minimum around town - a luxury of the 5-speed.
Also helpful off road in very low speed situations.
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07-07-2011, 05:13 PM
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#11
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Quote:
Originally Posted by sportscarfan
Regular, mid grade, and premium are ambiguous terms because octane rating varies with geographic location, elevation, etc.
I've noticed low RPM ping (detonation) with "regular" (85 oct. here) so I run "mid grade" or "premium" (87, 91) and the low RPM issue goes away. With the decent torque of the 3.4, I tend to shift early keeping the revs to a minimum around town - a luxury of the 5-speed.
Also helpful off road in very low speed situations.
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I never even thought of that, regular to me is 87 and premium is 93....that's a very good point.
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1997 3.4l SR5 5spd 4WD E-locked. Blue wire mod, 99 tall springs, 32" Duratracs, Satoshi Grill, Tundra 231 brakes, 99 center console.
1988 3.0l 5spd Pickup SAS on 35s with 5.29's, welded 8.4 rear, custom flat bed, on board air, XRC8 winch, homemade sliders.
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07-07-2011, 05:24 PM
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#12
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Mid grade here is 87. Regular is 85 and Premium is 91-92.
My 02 runs better on Mid grade.
__________________
2002 SR5 4x4, Dorado Gold
Suspension:Front:Toytec Coilovers w/ 5100 Bilsteins/RevTek Diff Drop, 231mm Tundra Brake upgrade. Rear: ToyTec Superflex coils/5100 Bilsteins.
Tires: 285/75/16 Bridgestone REVO 2's
The Rest:I.S.R. Mod upgraded to an Injen intake, Borla XR-1 muffler, ARB Bumper, Shrockwork's Rock Sliders, CBI Rear Bumper and a pair of Hellas. Plus a whole bunch of other accessories.Topped off with Zaino's Polish.
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07-07-2011, 05:46 PM
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#13
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Senior Member
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Quote:
Originally Posted by ALBPM
Mid grade here is 87. Regular is 85 and Premium is 91-92.
My 02 runs better on Mid grade.
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There is a pipeline that runs from TX to NY and it deposits fuel into Tank Farms all long the east coast. They only pump two types of gas Regular and Super.
Mid grade gets mixed at the fuel depot or at the gas station.
We even have gas stations here that sell 103 octane.
That is besides the point. The OP has other issues besides low octane gas like dirty gas or a dirty combustion chamber.
__________________
1999 Limited 4runner in Silver - 9th and 10th Injected TRD Supercharged 4.7 2UZ-FE swap - AISIN Manual hub lockers - Retrofitted E-locker - Downey Off road Coilovers & adjustable Pan Hard Bar - Whelen PA - 2" Personally made Body Lift - Eclipse Navigation Radio - Spider Trax - Custom Hidden Winch - Triple Electric Fans - Running boards off then back on again - Ghetto Cold Air Intake - Sequoia Brakes - V8 Badge (for extra horse power)
2002 SR5 Tacoma Extended Cab also in Silver On 37's and Guns for sale
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08-04-2021, 12:33 PM
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#14
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Similar experience - still think it's bad gas?
Quote:
Originally Posted by showell
After driving my 2000 4-Runner I turned the key to the off position, only the engine did not turn off? It made like a cranking run-on noise? After turning the ignition on and off several times it finally turned the engine off.
After 10 minutes I went to start it up and it was fine?
Any thoughts on what the problem was and what, if anything, should I do?
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Hi there,
I had a similar experience to Showell's this weekend. I have a 1999 V6 SR5 4Runner. Stopped at camp in evening after driving most of the day. After about 30mins started it up and engine was making very strange noise. Drove a little then stopped, turned off, but the truck sounded like it was still running! Didn't know what to do so I restarted it immediately, smelled some kind of a burning smell, but then it ran fine.
Next day, put Gumout fuel injector cleaner in with 88 gas (usually use 87; never 85), drove the 100 miles back home and it seems totally normal.
Should I be worried or you all still think bad gas?
Thanks!
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