BMW 323i Running bad after sitting

[vejay24]

Hello I just bought a 323i bmw manual that was sitting for over 2 years. It was running fine before no problems. When I went to drive it home the coolant started leaking and the engine overheated. The brakes didnt feel powerful enough maybe the brake fluid was low. The transmission makes grinding noise going into gear probably a tiny gunshot noise it was weird. After stopping to the side of the road putting in water in the radiator since I didnt have coolant and it was an emergency the car didnt overheat or leak coolant again drove fine except for the transmission and brakes.
Would I need to change all fluids since it was sitting for this much time and now its running bad? Transmission, brake, oil, steering, coolant.

[dworthy]

Welcome to the Forum!

There is a good chance that the fuel has gone bad if there was no stabilizers added.

Brakes are going to be a problem, for I am sure they are rusted over, so all new pads and rotors.

Fluids and a tune-up would be called for in this case, and worth the investment if you plan on making the car a daily driver.

I am assuming it is a manual gearbox?

[vejay24]

Yeah it is a manual gearbox. I'm going to check the transmission oil if its good.

[dworthy]

I am willing to bet that it has never been changed. Also have a look at the diff too, while you are under there.

Pro tip: Always open the fill plug before you remove the drain plug.

[vejay24]

Okay will do. The rear axle was making some noise will check that diff. I'm not going to see the car until weekend

[MarcoZandrini]

The car has an engine made from aluminum. Do not overhear the engine or you’ll be stuck with a 500 pound paper weight!!! The entire cooling system needs to be replaced with an E46 (BMW’s chassis designation) of that age. Installing aftermarket cooling system parts is strictly verboten!

[vejay24]

Yeah I'm looking into the coolant overhaul kit

[vejay24]

Hello, my scanner picked up dtc codes which are p1250 BMW, p1519, p0170, p0173, p1189, p1188. My guess is that these codes came up because the gas went bad or oil since it was sitting and not changed. I will refill the gas and use marvel mystery oil. Also could be the MAF sensor or fuel pressure regulator as other people in this forum experienced

[harrier]

In order:
1. Fuel pump and filter. I would just replace the filter, then check fuel pressure at the rail with the key at position 2 with engine off. Should read 50psi
2. Vacuum leaks. All the vacuum hoses, both intake boots, CVV. Just replace. Then check DISA and dipstick rings. Smoke test after all this to see if you have vacuum leaks in the engine
3. Sensors. If your pre-cat sensors are over 100k (125k if broadband) then replace them. Probably also issues with MAF

Look at your long term fuel trims with OBDFusion and your phone. Ideal is +/- 2%

[vejay24]

In order:
1. Fuel pump and filter. I would just replace the filter, then check fuel pressure at the rail with the key at position 2 with engine off. Should read 50psi
2. Vacuum leaks. All the vacuum hoses, both intake boots, CVV. Just replace. Then check DISA and dipstick rings. Smoke test after all this to see if you have vacuum leaks in the engine
3. Sensors. If your pre-cat sensors are over 100k (125k if broadband) then replace them. Probably also issues with MAF

Look at your long term fuel trims with OBDFusion and your phone. Ideal is +/- 2%

Thanks will test in order