will they make it run poorly?

 

Yup.

It can run very poorly and give all the codes.

 

Ordered 4 new Denso sensors, will get them tomorrow,

 

Denso sensors installed. Still has problems starting, and very sluggish on the bottom end. No codes have popped up yet. The engine only gets to about 4000 rpm in low gear. I put in a new fuel pump 8 months ago. For some reason my gas gauge is reading all over the place, one time in doesnt read at all, and others reads 3/4 to full.( the tank is full). I really think I have a fuel issue. Is there any way to test if it is the fuel pump, or injectors?

 

Borrow or rent a fuel pressure gauge. There are fittings on the fuel rail.

It should be 49-50 psi.

You can test to see if the injectors are firing but you can't tell the spray pattern (clogged). They'd need to come out to be checked.

Do you have a vacuum gauge? How's your catalyst?

 

I went out hunting last night, and the CEL came on. Codes 0300,0302,0304, and 455. Misfires, and a evap leak.

 

Hate to say this but it may be a PCM issue. The fuel gauge runs off the PCM too.

Did you ever check the connectors on the PCM for oil?

Pull the plugs on those cylinders and check for condition. That's a "large" evap leak. How's the fuel cap? Is the filler neck rusted?

 

Found that the evap hose was disconnected under the hood. Codes 300,301,302, and 304 now. One of the connectors did have some oil in it. I cleaned it, but no difference. When I replaced the plugs a couple weeks ago, i PUT IN Bosch plugs. Are they as bad as the 02 sensors?

 

Everyone swears by one plug I don't know what it is sorry

I have used Bosch products for years I have Bosch plugs and my 2.5 likes them and I have their O2's and have no problems.

But it could be the 4.7 doesn't like/run on Bosch

 

I've only run the OEM Champions so can't tell you about the Bosch plugs. Pull them and look at them.