On a v8 4RUNNER would bad o2 sensors cause every cylinder...
Responses
Daniel Chaidez
227 days ago
Good Afternoon, my name is \*\*\*\*\* \*\*\*\*\* ill be helping you, so sorry to hear about the issues here on the 4Runner, i know how frustrating it can be to deal with misfires. Faulty O2s can cause every cylinder to misfire since the [engine](/topics-engine-toyota/) cannot control air fuel ratio as needed. I would recommend we first rule out the ignition and fuel delivery system first since that causes misfires more commonly but O2s can also cause it yes.
Customer
227 days ago
Ok
Daniel Chaidez
227 days ago
sounds good!
Customer
227 days ago
Well I've always had bank 2 sensor 1 bad but never misfiring and I actually melted the vac canister and still no misfire and put on a kn coll air intake and no misfire. Was wondering what that u shaped rod is under the plastic piece that says Toyota 4.7 v8 on top of the engine and it's got a adjustable screw. Is that the crank position?
Daniel Chaidez
227 days ago
i would need a picture or part number to confirm but the crank sensor is not on the top of the engine on the 4.7s so no it wont be that
Customer
227 days ago
Ok well I'm guessing a [spark plug](/topics-spark-plug-toyota/) or the o2 sensors. Would hooking anything electrical that draws alot of current cause misfire?
Daniel Chaidez
227 days ago
no it would not
Customer
227 days ago
Customer attachment 2/17/2021 8:31:40 PM
Customer
227 days ago
That screw just above the cover
Daniel Chaidez
227 days ago
thats just to hold down that hose, its not anything electrical and wont be related to the misfire
Customer
227 days ago
I smell rotten eggs
Daniel Chaidez
227 days ago
thats common with a misfire.
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On a v8 4RUNNER would bad o2 sensors cause every cylinder to misfire Mechanic's Assistant: Have you located all of the vehicle's [oxygen sensors](/topics-oxygen-sensor-toyota/)? Are the wires leading to and from each intac...
On a v8 4RUNNER would bad o2 sensors cause every cylinder to misfire Mechanic's Assistant: Have you located all of the vehicle's [oxygen sensors](/topics-oxygen-sensor-toyota/)? Are the wires leading to and from each intact and in good shape? Yes Mechanic's Assistant: What year is your 4Runner? 2006 Mechanic's Assistant: Are you fixing your 4Runner yourself? What have you tried so far? It depends and I haven't done anything but put my code reader on and it came up with bank 1 sensor 2 and bank 2 sensor 1 and all 8 cylinders misfire and vac canister leak but it's not that but I did go from 1 [exhaust](/topics-exhaust-toyota/) to dual exhaust by taking out the y connector and running another pipe and exhaust Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? How much