today i decided to change out my rear vlave cove gasket becuase it was leaking real bad. put everything back together now it will crank start up here and there if i keep my foot on the gas it will stay running. it will not even to attempt to start in drive or reverse or in park and neutral. i took it all apart and put back together twice. also while i was doing this my egr vlave was completly clogged so scrapped out all the gunk. my thought is maybe its stuck or open. would that cuase it?

thank you so much for any help

forgot to mention there is a humming sound when the car key is set to on almost sounds like its coming from starter

 

I say vacuum leak from your description overall.

 

how do i find one?

 

Get it running, even if barely, and spray carb cleaner around suspected leak areas. A spike in engine speed indicates a leak. It is a flammable material in an area where it could possibly ignite, so use caution (duh).

 

you probably forgot to hookup a disconnected vacuum pipe. Check all of your pipes and hoses.

 

ok so car runs now but shakes when idling it takes a minute to accelerate also make a sputtering noise while driving.
worse part of all still leaking oil but i dont think from rear valve cover because the car has stopped smoking used to look like the engine caught fire.
it is leaking behind oil pan area i just cant locate it anyone got any ideas what gasket it might be?

 

update just changed all the spark plugs rough idle is gone and acceleration seems fine now i just got this pesky oil leak its leaking about 1 quart a day need help plz
oh and thanks everyone who suggested vacuum leak

 

hmm interesting, spark plugs are quite cheap. they can do things if they are bad, but glad to hear its gone. did the oil leak come after u got new spark plugs?

 

it was leaking before.
well drove to work, car was awesome got out of work car cranked but didn't start this maxima dosnt like me

 

How was the condition of your old spark plugs? Maybe the new plugs are already soaked in oil. Better check.

 

^ and fix the oil leak, any leak is not good.

I have one leak but its from the Air conditioner I use in my car alot, and it leaks "clear liquid" looking like water after i turn off the car and its suppose to be condensation or something like that. and heard its normal.. but nothing else leaks for me.

 

no the old spark plugs were just black and grey i didnt se any oil leaking from seals around spark plugs

 

ok so i just pulled codes from engine p0325-knock sensor and p1335-ckp
guessing its not the ckp since i still have spark sprayed some start fluid in it and it cranked put only for a second but like a dummy forgot to check fuses