Hey guys.
I have I recently replaced my headgasket after it overheated from not properly bleeding my coolant in my new radiator. The problem I’m having is that I’m receiving these codes from the check engine light: P0300, P0301, P0302, P0303, P0304. When I did my headgasket I also replaced these parts: oil pump chain, timing chain, oil pump tensioner, tensioner guides, sprockets for both chains, tensioner for tensioner guides, thermostat, oil, coolant, power steering fluid, spark plugs, head gasket, intake manifold gasket, exhaust manifold gasket, valve cover vent hose #1, valve cover vent hose #2, I used ARP head bolts since oem tends to lift overtime and I torqued them properly, coil pack connectors and I got the head of the motor to be machined and resurfaced for the new gasket by a machine shop and they cleaned it up as well.
Just as more background, it received a top induction service at 134,000 miles and it recently in the last six months has gotten a new battery alternator and radiator. I compression tested it and all cylinders are holding good pressure around 150 psi.
I’m not sure what else to check for. What do you guys think?
2007 scion tc with 156,000 miles.
Thank you for the updated information. I've added it to your question, and I've formatted it a bit so it's easier to read and follow. Good luck.
Looks like the only thing you haven't addressed is your fuel system - pump, filter, injectors, etc.
Other than a fuel pressure test, how would I know which is going wrong?
Fuel spark air and compression is what an engine needs to run so you need to test that all of those are working.
Visually confirm spark, measure fuel pressure, etc...
This is all covered in the 'Frequently Asked Questions'
Spark plugs, coil packs, compression and air were checked and good, I haven't checked fuel pressure YET