Croghanite

First post:

1988 4Runner 22RE

My #4 ground is not connected to the intake (see below image). Would someone please explain the likely ramifications of that cable not being connected to the intake?

Would this cause a lack of power at highway speeds and going up hills?

What should the torque be for the mounting nut?

-Thanks


https://www.yotatech.com/forums/f116...-guide-194413/

#4
This is probably the most commonly overlooked and asked about ground on the 22re. It sprouts off of the same wiring harness that runs between the upper and lower intake and has all the fuel injectors and VCV pigtails as well. It is actually 2 wires, that both bolt together at a bolt that secures the upper and lower intake together.

Croghanite

No takers?

RustBucket

iTrader: (1)

That wire just needs to be grounded somewhere. The intake is just a nice convenient engine ground. Make sure there is minimal resistance between that ring terminal and the negative battery terminal. Torque would be approx 25 ft-lb.

ToddShaw

I believe that it is there to ensure a good ground on the upper intake. Remember that there is the throttle position sensor and 2 water temp sensors on the upper intake (at least on my 22re engine) that need a good ground. I know the bolts provide grounding as well from the upper intake to the lower intake to the cylinder head/block and finally back to the negative side of the battery. The negative side of the battery is ultimally your best grounding spot on the vehicle.

As far as the ‘lack of power at highway speeds and going up hills’ I don’t think this would cause it. But for sake of elimination run a wire to ‘#4 ground’ to the negative side of the battery and drive it at highway speeds and up the hills to see…… But if I were you I would do a compression test of the engine. If you have a lot of miles on it, 250,000 +, then it may be time to rebuild.

Hope this helps,
Todd

ToddShaw

[FONT=Verdana]I believe that it is there to ensure a good ground on the upper intake. Remember that there is the throttle position sensor and 2 water temp sensors on the upper intake (at least on my 22re engine) that need a good ground. I know the bolts provide grounding as well from the upper intake to the lower intake to the cylinder head/block and finally back to the negative side of the battery. The negative side of the battery is optimally your best grounding spot on the vehicle.[/FONT]

As far as the ‘lack of power at highway speeds and going up hills’ I don’t think this would cause it. But for sake of elimination run a wire to ‘#4 ground’ to the negative side of the battery and drive it at highway speeds and up the hills to see…… But if I were you I would do a compression test of the engine. If you have a lot of miles on it, 250,000 +, then it may be time to rebuild.

Hope this helps,
Todd

wyoming9

iTrader: (1)

That is the ground for the ECU if it is poor the engine will not start at all.

over all poor grounds can make the engine run poor and start harder.

While that was a nice post showing the ground points not knowing what they are for is sort of troubling .

Since my engines have none of the ones in the pictures


Then know your limits with the 22R series engines.

ToddShaw

Test Post

ToddShaw

Not sure why my posts from yesterday do not show? I'll try again.

ToddShaw

I believe that it is there to ensure a good ground on the upper intake. Remember that there is the throttle position sensor and 2 water temp sensors on the upper intake (at least on my 22re engine) that need a good ground. I know the bolts provide grounding as well from the upper intake to the lower intake to the cylinder head/block and finally back to the negative side of the battery. The negative side of the battery is optimally your best grounding spot on the vehicle.

As far as the ‘lack of power at highway speeds and going up hills’ I don’t think this would cause it. But for sake of elimination run a wire to ‘#4 ground’ to the negative side of the battery and drive it at highway speeds and up the hills to see…… But if I were you I would do a compression test of the engine. If you have a lot of miles on it, 250,000 +, then it may be time to rebuild.

Hope this helps,
Todd