I bought my car 2 days ago and immediately put octane 93 V-POWER at shell. The recommended gas is octane 87. Within 24 hours, the engine began to shake terribly and couldn't drive the car. I took it to the dealer where they diagnized code 0301 cylinder 1 misfire and suggested that i change the spark plug. Will this solve the problem? what do you think of my half-tank full of octance 93, what do i need to do about it? Drain it? Please i need your help!
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Your car is and will be fine - the lower octane fuel just predisposes the engine to pre-ignition pinging (you don't want to make a habit of it, but its no big deal). Plus, by diluting it with Ultra 93 octane, you raised the overall octane of the fuel in the tank to somewhere around (87+93) /2 = 90. Happy motoring.
remove the plug from the #1 cylinder, and install it into the #2 cylinder , and put plug from # 2 clyinder in to #1 plug hole, connect plug wires, and start up vehichle, and if computer shows misfire on # 2 cylinder , then you have a bad plug, possibly porcelin insulator could have a hair line crack in it, hope that this information has helped you.
it may be idle control sensor or a bad mas air flow sensor--maf sensor in otherwords. or could be engine misfire at cold temp. start. only time when cold? or does run better when warm? try warming engine to operating temperature before driving,if problem removes it's self after warm up,up grade gas to 93 octane for 1 tank full. then see if problem goes away. it's cold where you are right? if so the fuel needs to be at least midgrade 89 octane fuel because 87 octane fuel will not start your honda correctly at cold temps. in cold weather 93 or super gas octane will start ,no problem,low octane fuel sometimes gels, or freezes at low temps. if in warm climate, change the fuel filter, add fuel injector cleaner to your fuel tank[preferablly lucas fuel treatment] this will lube your fuel injectors and give better fuel mileage. thank you for choosing fixya.com
you should have a factory affixed sticker inside gas compartment cover listing premium fuel only or also listed in your owners manual. Otherwise if you notice that you're vehicle is making a pinging sound while accelerating or climbing a hill for instance then you may want to step up to 89 or 93 octane and try to avoid purchasing fuel with ethanol added it's **** and degrades your fuel quality/octane ratio
Your jeep has two engine options, one was a standard 4.7 V8 and the High Output V8. Below is the recommended octane fuel rating. Unleaded regular, 87 octane (R + M)/2 - Standard; Unleaded premium, 93 octane (R+M)/2 recommended - High Output Thank you for using fixya and be safe.
Best way to check is by looking at the gas cap. If it does not say "Premium fuel only" you should be safe. Higher octane rated fuel is used for higher compression motors, and I dont belive that your engine (my guess is the 5.4 V8 should be around 9:1 compression) needs the high octane.