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Only P0301. Misfire has always been located to cylinder 1. No other misfire codes or random/multiple misfire codes.
Engine doesn’t have lifters. They’re shimmed. My gut says it’s not a valve spring, because I’d think it would misfire more often than once in a blue moon. Spark plugs all looked normal, not even burning oil. Coolant level has stayed more or less the same since I changed the thermostat out 20k ago or so. Haven’t tested for HC in the coolant though..
Misfire does trip a CEL. Flashing CEL. Valve adjustment is on the loose end of spec, but still within. It does have VVT, never had any faults for it, and testing via diagnostic software shows it to be OK. Haven’t checked for exhaust leaks, but I no longer have a catalytic converter. Exhaust system is all new, no restrictions should be present. I have tried to log data via Torque Pro, but nothing looked out of whack to me (sensors dropping out, noisy signals, etc)
[quote=”RogueTeddy” post=86534]Trust me, as noted before its easier to drop the pan then to pull the timing cover off… I’ve done a couple of timing cover reseals and if your going to do the timing cover you also have to do the sump and rocker cover as well haha[/quote]
Yeah I’ll be dropping the pan. Luckily the timing chain area has a direct drain to the sump/oil pan.. I should be okay.
[quote=”RogueTeddy” post=86534]Trust me, as noted before its easier to drop the pan then to pull the timing cover off… I’ve done a couple of timing cover reseals and if your going to do the timing cover you also have to do the sump and rocker cover as well haha[/quote]
Yeah I’ll be dropping the pan. Luckily the timing chain area has a direct drain to the sump/oil pan.. I should be okay.
[quote=”guiltyxbyxdesign” post=86519]drop the pan and check for it… a new jug of oil is cheaper than a new timing chain or worse a new engine[/quote]
Only problem is that my car is sitting in my college parking lot. I guess I could get someone to bring me an oil pan..[quote=”guiltyxbyxdesign” post=86519]drop the pan and check for it… a new jug of oil is cheaper than a new timing chain or worse a new engine[/quote]
Only problem is that my car is sitting in my college parking lot. I guess I could get someone to bring me an oil pan..[quote=”EricTheCarGuy” post=86091]Good find! Yes, over revving can cause the engine to fly apart. You’re lucky it was just the rockers. You have to consider the forces at work here. Those valves have to change direction 180º in a fraction of a second. There comes a point where inertial forces take over and things come apart.
Thanks for the update. Let us know what happens when you get it back together.[/quote]
Will do Eric, and yes, the ‘sudden’ acceleration was due to people having 2 floor mats in their car. I consider myself blessed that I don’t have to completely rebuild the top end of the engine.[quote=”EricTheCarGuy” post=86091]Good find! Yes, over revving can cause the engine to fly apart. You’re lucky it was just the rockers. You have to consider the forces at work here. Those valves have to change direction 180º in a fraction of a second. There comes a point where inertial forces take over and things come apart.
Thanks for the update. Let us know what happens when you get it back together.[/quote]
Will do Eric, and yes, the ‘sudden’ acceleration was due to people having 2 floor mats in their car. I consider myself blessed that I don’t have to completely rebuild the top end of the engine.[quote=”barneyb” post=85976]I’d suggest, when you have it back together, check compression.[/quote]
Will do. Good idea.[quote=”barneyb” post=85976]I’d suggest, when you have it back together, check compression.[/quote]
Will do. Good idea.[quote=”Rereonehundred” post=85943]What an engine!!!!
Float the valves and spit out the followers.
With engineering like this, maybe Toyota really did have “Sudden Acceleration Syndrome” rather than driver pedal confusion!!!!![/quote]
I suppose that’s true.. Lol but when this happened to me, I had almost no engine power. I thought the runaway Toyota came from too many floor mats, and the gas sticking to them.[quote=”Rereonehundred” post=85943]What an engine!!!!
Float the valves and spit out the followers.
With engineering like this, maybe Toyota really did have “Sudden Acceleration Syndrome” rather than driver pedal confusion!!!!![/quote]
I suppose that’s true.. Lol but when this happened to me, I had almost no engine power. I thought the runaway Toyota came from too many floor mats, and the gas sticking to them.[quote=”ToyotaKarl” post=85883]Would love to see the pics…. Did they survive that well?
-Karl[/quote]
All of the rockers survived completely intact. Lost a couple valve stem caps to the oil pan.That’s the #4 cylinder. No rockers left attached.
