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Old 06-27-2022, 12:28 AM #1
Hoglegs3006 Hoglegs3006 is offline
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Occasional rough start and battery light

Hello, first time starting a thread on here.

I have a 99 4runner limited 3.4 automatic trans 4x4 with about 256k miles. I have had the rig for about 6years now and it's always been a great and reliable vehicle. I have gone allot of awesome places in my 4runner. Towards the start of the new year it started giving me some problems, Rough idle and misfires. After chasing problems and throwing parts at it I finally figured out it was a injector failing along with the fuel pressure regulator. I got that fixed and she's been running great. So this leads me to a new minor issue.

I don't drive her very much nowadays, pretty much just a weekend camper/hunting rig and grocery getter now. Occasional when I go to start it hot or cold I get a slightly longer crank time and the battery light on the dash flashes a few times then it turns over. The battery light only flashes when I'm starting it and goes away as soon as the engine starts. Today I took a multimeter to my battery and alternator and they seem to be within the specs they should be. After surfing the web for a hour I decided I would check the electric connections and grounds. What I found is the ground that goes from the back of the engine block to the fire wall was pretty saturated with oil and road grime. I cleaned up the connection point on the block really well and also cleaned the wire too. I reconnected the ground and started it and she turned over really smooth and quick. But like I said it only does the rough start and flashing battery light every once in a while. The problem could still be there and it just hasn't had a opportunity to present itself.

So my question is, do you guys think a dirty/bad ground connection could cause a occasional rough start and flashing battery light? What other parts do you think I should check?

I know this is like finding a needle in a hay stack but any suggestions would be appreciated.

List of parts replaced in the past 6 months

Spark plugs
Ignition coils/wires
Upstream/down stream o2 sensors
Fuel filter
Fuel pressure regulator
Fuel injectors
Oil/oil filter
Air filter
Cleaned MAF

Starter is new, about 12 months old.

I know there's a few other parts I replaced but can't think of them at the moment.

Thanks guys, I love this forum by the way. I have been lurking around on here for about 6 years now and this is my first time starting a thread.
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Old 06-27-2022, 07:19 AM #2
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Welcome to posting... The 3rd gens will not kick the fuel pump on into it reads rpm. So it's very common to take 2 seconds to start the engine.

What I am not liking is the battery light flashing when your trying to start the rig. I can't say I seen that before.

So are your battery terminals clean?
What's the condition of the high Amp wire that runs to the starter?

Does your battery have enough cranking amps and is sized properly for this engine?

Does a load test show the battery is good?



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Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...ion-5vz-fe.htm
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Old 06-27-2022, 08:42 PM #3
Hoglegs3006 Hoglegs3006 is offline
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Quote:
Originally Posted by brillo_76 View Post
Welcome to posting... The 3rd gens will not kick the fuel pump on into it reads rpm. So it's very common to take 2 seconds to start the engine.

What I am not liking is the battery light flashing when your trying to start the rig. I can't say I seen that before.

So are your battery terminals clean?
What's the condition of the high Amp wire that runs to the starter?

Does your battery have enough cranking amps and is sized properly for this engine?

Does a load test show the battery is good?



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The battery is a duralast gold from AutoZone and it's about a year 1/2 old. It says it's got 750 cold cranking amps. The terminals are pretty clean but I went ahead and cleaned them up with some rubbing alcohol. All the wires are in fairly good shape too. I don't think the battery is the problem but I have been wrong before...

Since I cleaned up the ground connections she's turning over nice and smooth and so far no flashing battery light on the dash.

Could something as simple as poor ground connections cause this problem?
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Old 06-27-2022, 08:45 PM #4
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Quote:
Originally Posted by Hoglegs3006 View Post
The battery is a duralast gold from AutoZone and it's about a year 1/2 old. It says it's got 750 cold cranking amps. The terminals are pretty clean but I went ahead and cleaned them up with some rubbing alcohol. All the wires are in fairly good shape too. I don't think the battery is the problem but I have been wrong before...

Since I cleaned up the ground connections she's turning over nice and smooth and so far no flashing battery light on the dash.

Could something as simple as poor ground connections cause this problem?
Yes it could have been as simply as that.. I had a starter years ago loose its ground from really bad oil leaks.. Most likely your got it resolved. :-)
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Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...ion-5vz-fe.htm
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Old 06-27-2022, 08:46 PM #5
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750 cold cranking amps at 0 F
935 cold cranking amps at 32F

Part number on the battery is 24F-DLG
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Old 06-27-2022, 09:03 PM #6
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Quote:
Originally Posted by brillo_76 View Post
Yes it could have been as simply as that.. I had a starter years ago loose its ground from really bad oil leaks.. Most likely your got it resolved. :-)
I sure hope so, I guess only time will tell. I just have to keep a eye on it and hope it doesn't do it again.

My biggest concern is damaging some electrical component or it not start while I'm in some remote location in the nation forest. My wife is pregnant and she would be very unhappy camper if that happened in the middle of our hell fire summer. Haha.
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Old 06-27-2022, 09:37 PM #7
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Originally Posted by Hoglegs3006 View Post
I sure hope so, I guess only time will tell. I just have to keep a eye on it and hope it doesn't do it again.



My biggest concern is damaging some electrical component or it not start while I'm in some remote location in the nation forest. My wife is pregnant and she would be very unhappy camper if that happened in the middle of our hell fire summer. Haha.
Happy wife happy life.. Yes keep an eye on it. The starter contacts are mostly last 180k to 250k max.

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Brillo's Bucket Fluid Exchanger: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...ion-5vz-fe.htm
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