The 4runner is throwing 3 codes,#1 DTC code po302 cylinder 2 misfire detected freeze frame data fuel sys 1 cl calc load % 66.6 ect deg f 197 stft b1 0.7 ltft b1 10.1 iat 78 Po301 cylinder 1 misfire detected no data Po300 random misfire ive changed air filter, spark plugs, wires, cleaned MAP sensor, checked pcv looked good, changed rear o2 sensor, wasnt gicing a reading....im thinking maybe injetors? or injector wiring? maybe clogged cat? any help would be great....thanks oh yea i have an INNOVA 1303 scan tool with live data and DTC freeze frame
I keep having a cylinder 4 misfire I have change the wire plug and injector but still have the issue any help would be greatI keep having a cylinder 4 misfire I have change the wire plug and injector but still have the issue any help would be great
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Nice info but what's your question ? You have a Oxygen Sensor Circuit Slow Response (Bank1, Sensor1) code P0133 , an you have P0171 System Too Lean (Bank 1) ! You have a bad O2 sensor , vacuum leak , Test O2 Sensor mov
-25 LFT? your dealing with a fuel injector that is leaking or not atomnizing, Inspect the fuel pressure vacuum line is fuel coming out of the pressure regulator?
the po300 code is for a cylinder misfire, usually followed by a last number of 1 2 3 ect, showing which cylinder is misfiring, normally this can be fixed by installing a new set of plugs, the po171 code could be this
The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor. you cleaned that but it could be fouling out you could also have this happening
Inspect all vacuum and PCV hoses, replace if necessary
Check for a dirty fuel filter and proper fuel pressure
these are hard to diagnose. First trace evap hose from fuel tank to evap cannister. Check for cracks in hose or loose connections. Check out cannister for cracks. Also check hose from cannister to intake manifold. If hoses are good, it may be leaky purge valve. Hope this helps.
the code means something wrong with the EVAP system your cars fuel canister lines my be leaking or its as simple as forgetting to tight up your gas cap. as far as running rough.. this is kind of vague but anytime my car runs rough i change out air cleaner and plugs, usually 90% of the time this fixes the rough idle ,but for example today in fact i had a rough idle and the car has 297000miles on it and i"ve never ever serviced or thought to clean my idle control assembly before...so before i even started to take it off i found the screws were both loose...so i took it out and was so embarrassed that it was 297000 miles worth of grime on it, so i just sprayed it cleaned it with Gummout Carb clearner and made it look almost new. I just got through doing this...so i started it and it took awhile for it to reposition, because i pushed the spring in.. but now it seems to be idling a lot better. if your car still runs rough check the condition of your plug wires also.
I keep having a cylinder 4 misfire I have change the wire plug and injector but still have the issue any help would be great
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