How to install fuel fuel injectors

[mwogan1]

I sent msg to see and ask about my 2003 impala it runs good it till it gets half tank and i put gas in it in rrunns good and then i go up hills and down hills it acts up again .then i let it set for 8hours and its fine for one to two days

[ProTech]

It could be something in the tank, yes, but the only way to find out is to drop the tank out and inspect it. There might be other issues as well such as a bad sending unit, clogged fuel filter, etc.

[mwogan1]

How can u tell the sending unit is bad in the gas tank

[ProTech]

Sometimes it will set a trouble code, other times not. You would have to remove it and look for corrosion, or deterioration.

[mwogan1]

Would u no the fuel pressure it should have

[ProTech]

It should be above 45psi with the key on and hold steady while running. If the pressure drops off or is lower than spec, you either have a bad fuel pump, or a restriction in the fuel delivery system, or a bad fuel pressure regulator.

[mwogan1]

I put a new pump and everthing in tank .when I'm going down the road it acts up and acts like its going to stall again after new pump .do u thing it could ne pulgs because it don't do it all the time

[ProTech]

Have no idea, it could be a multitude of things. I doubt it is spark plugs. You should still check the fuel filter, it could be clogged. As we as check the fuel pressure regulator for leaks. It could be a clogged catalytic converter, low compression, or other internal issues, or even another faulty sensor. This really needs to be checked out in person by a live technician. Take your car to a shop would be your best bet.

[mwogan1]

Put a new pump .thotte senser.map senser nee plugs and filder new maf senser and still acting like its not getimg gas like it should .when i toke the tank off it had a lot oof diirt in it i cleaned it out and put the same gas back iin do u think its thegas is dirt??

[ProTech]

Yeah, you probably shouldn't have put the old gas back in a tank that was full of dirt. Plus, if there was dirt in the tank, that means there is dirt in the fuel lines and probably the fuel injectors as well. You should really take everything back apart and clean the fuel lines out from front to back. Then you'll want to clean the fuel injectors, which you probably don't have the equipment to do. Also, you should put another new fuel filter on since you basically let dirty gas flow through it again.

This ENDS your FREE help. Any further questions will have to be paid for.

[army1462]

how do you put back on fuel injectors on a 2003 Chevy Malibu 3.1 ?

[carriedi]

first make sure you got the O-rings out of the fuel rail and the intake ports. Make sure the injectors you're putting back in, the old ones or the replacement ones, have O-rings on the top and bottom. Lube the O-rings on the injectors before you put them back in. Use brake assembly fluid, dielectric grease, silicone grease... Install them into the rail first. then line them all up with their ports and push them onto the intake.

how far did you take things apart when you removed the injectors?