2.5L ('98-'01) Replaced injectors and Fuel Pump, Runs super rich and misfires

[Kchorus]

Hello all, I've recently done some work to my truck, fuel pump, injectors, and fuel filter. I started the truck after priming the fuel and it started up perfectly fine and idled good, after about 30 seconds it started to slow down, then misfire, then nearly die. Now I'm just in this weird loop, no codes but multiple cylinder misfires. I've checked for vaccum leaks and found none so far. I unplug the IAC and the engine sits at about 200-400rpm and runs very quietly. I've also removed the fuel pump relay then started it and got my misfire, then it started to run right again minus the misfire as I revved it up. I'm confused and I don't want to shoot the parts cannon at it as that'll probably solve nothing.

BTW the injectors are standard motor products brand. They worked fine with the ancient fuel pump and I was able to drive. Then I installed the fuel pump and my problem arose.

Thanks!

 

[SenorNoob]

I see changed parts. Why? What about the air filter?

 

[Uncle Gump]

What year...

What engine...

 

[Kchorus]

What year...

What engine...

1999 2.5l, thought I had it

 

[Kchorus]

I see changed parts. Why? What about the air filter?

Clean, parts were far past their time

 

[SenorNoob]

Can you check fuel pressure? I'm betting it drops off quickly when running.

 

[Kchorus]

Fixed it. Put old injectors in, runs perfectly fine. Fuel pressure hold solid 60-70

 

[Uncle Gump]

I haven't heard one single person say anything good about those injectors.

 

[Kchorus]

Being returned as we speak. Old injectors were just fine

 

[Uncle Gump]

Yeah... I bought a set of used factory injectors. I'm just gonna clean... test and rebuild them. Far better then aftermarket units.