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Hi Im David. thanks for visiting the site. what fault codes are you getting when it starts acting up?
ok, im going to need a while to let you know what i think is going on. thanks.
P0015 TOYOTA - Camshaft Position 'B' Timing Over-Retarded Bank 1 Possible causes - Dirty Oil - Variable Valve Timing (VVT) circuit is open or shorted - Oil Control Valve (OCV) circuit is open or shorted - Faulty variable valve timing (VVT) - Faulty oil control valve (OCV) - Damaged ECM
P0301,0302,0303,0304 TOYOTA - Cylinder 1,2,3,4 Misfire Detected Possible causes - Faulty spark plugs - Clogged or faulty fuel injectors - Faulty ignition coils - Fuel injector harness is open or shorted - Fuel injector circuit poor electrical connection - Ignition coil harness is open or shorted - Ignition coil circuit poor electrical connection - Insufficient cylinder compression - Incorrect fuel pressure - Intake air leakP0171 TOYOTA - Air/Fuel Mixture System Lean Bank 1 Possible causes - Intake air leaks - Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Lack of fuel - Faulty Mass Air Flow (MAF) sensor - Incorrect Positive Crankcase Ventilation (PCV) hose connection
first thing that must be done immediately. a full compression test to check the general health of the engine.
chances are the compression will be fine since it runs fine until it warms up, so I think its going to be a oil pressure problem or a timing issue.
it can also be a computer problem thats overheating
you're welcome. can i be of further assistance? do you need asistance with the tests?
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checking in to see how its going
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