Guys i really need help cause im getting triped out...on top of the four codes i was throwing now it added on one more..here are all the codes that are being thrown and i wish someone could help me out i would really appreciate it a lot. p1402(egr)..p0421(cat)..po300(random misfire)..p0306(cyl 6 misfire)..p1522 and i am unsure about this code, something about my intake selenoid bank 2 malfunction! i have never came across this before. Im pretty sure all these codes are caused by just one problem but finding that problem is the hard part, i have changed the egr already and it did nothing, replaced fouled spark plugs and nothing, and i dont want to just change the cat and see what happens cause we all know how much that costs...i still need to look for a vaccum leak but i have checked once already and everything lookedgood.Any kind of advice would be great cause im at astand still..thankseveryone

 

anything would help

 

I would go after the misfire first. You have a cylinder identified as missing so go after it first. I would effect 1 repair at a time and clear the codes to see what pops up. There are vacuum T's under the intake that commonly break. This requires removal of the intake plenum which isnt real tough but requires some skills. There is one vac T that you can get to easily on the passenger side under theremovable intake runner closest to the firewall. I would not suspect it of causing a misfire however but it could seta solonoid code. Is it a 2.3 or 2.5?

 

Thanks for the reply, its a 2001 2.5l...im going to give it a shot, wouldnt a vac leak cause a misfire?

 

If it were sucking off that cylinder intake runner it could. Does the engine actually miss?

 

it does not idle rough, i know it could idle smoother than it is now but its nothing a passenger would notice if they got in my car, i know my car so i now it could idle better..there is no accel at all and my gas milage is right around ten to fifteento the gallon, and even when i go to turn the car on it would crank real rough...dont know what to do from here