Theres a sound on the top head and it sounds like lifters. also it wont boost and the oil pressure is low, very low, can i get help with this please

Oil light is rather important it goes out if oil pressure is good comes on if oil pressure is low when it comes on damage is expected with continued operation like wearing of main bearings and pistons and cylinders can lead to a engine rebuild

What is your oil pressure gauge doing? Low oil pressue will cause lifter sound. Check your oil. A small exhaust leak will sound like lifters also, but generally will go away after the exh manifolds heat up, if they have a small crack.

Better get a mechanic to check it out before you drive it very much.
Could be a lifter or piston pin with no oil.

Not familiar with the AGI valve...

Sounds pretty much like a blown head gasket.

The ticking is probably lifters -- don't know why they would stop ticking -- this ticking is usually casued by low oil pressure from low oil, clogged filter, weak oil pump, high-mileage engine, faulty lifters, etc...

Charlie

it sounds like your oil pump is not working good. check oil pressure at cold and what weight oil are you using. it may be too heavy for it to get up to the top of the motor quick.if there was any build up in the head when you changed the lifters you may want to flush the oil system good then put fresh oil back in

lifters are very common on this vehicle
mostly due to low oil pressure
check pressure at the block and the head
suspect you will need a new pump

I doubt if there is a lifter sticking. People who say that usually don't know what the noise is. Lifters in your car are operated by oil pressure from the oil pump in the engine. If you are low on oil you will hear lifter noise, probably from more than one lifter. If you are that low on oil, you have probably done some serious damage to your engine. In short, without tearing the engine down you can do nothing for a noisy lifter.

Check and make sure you have oil in the engine and also check the engine oil pressure if pressure is low you have a bad engine needs rebuilding.

ticking sounds that are worse when cold usually indicate a lifter issue or valve train

Lifters require pulling the intake and the heads

It sound as it your oil pressure senser or the oil pump needs replacing.