Candyredz28

iTrader: (4)

I need help fixing my idle, everyday I start the car especially the morning, the car struggles to keep an idle. The car wont die but the rpm's go up and down for a minute before it idles normal. I got my car tuned, didnt work, they told me I had a misfire, so i change the wires, and plugs, 02 sensors and didnt work. I check for vacums but i dont see one. So what could be the problem.

2001NBMZ28

Do you have good battery voltage/connections? Sounds like it might be relearning idle. Just something to check. No codes right?

Candyredz28

iTrader: (4)

battery connection is good, no codes, the only thing I can think right now may be a intake leak, but how would you check if you got a vacuum leak?

SparkyJJO

iTrader: (11)

Does it start normally or take a while to crank? My V6 cranks for longer than normal then tends to do what you are describing, plus it smells like gas when it first starts. I haven't figured out why yet. It does it after sitting for a little while. Occasionally it starts right up like it should and doesn't smell bad.

Something to try with the idle bobbing, when it starts push the gas a tiny bit to give a slight rev for a second or two to see if it smooths out and then let off and see if it drops to normal. I found I can get the idle under control quickly that way if it doesn't fix itself within a couple seconds.

samson_420

iTrader: (1)

Have you swapped the intake? If not, it's most likely not leaking.

Do a compression check.

I had a car with a fairly bad missfire, I replaced all the ignition components then the injectors. Six months later I did a compression check to find the one cylinder had only about 65 PSI.

jsteele90

iTrader: (13)

replace the gasket that goes around the egr pipe into the intake manifold. fixed my fucked up idle on my car.

intense3123

Your problem sounds like leaking injectors.

To the OP, it kinda sounds like your PCM is trying to relearn some parameters, don't know why though.

SparkyJJO

iTrader: (11)

But it has done this between two motors now, each with its own set of injectors

Could the OP's issue be a weak battery perhaps?

Candyredz28

iTrader: (4)

I did replace the intake with an ls6 unit, and mu battery is new, it does take just a little bit than normal to crank.

Candyredz28

iTrader: (4)

Can someone give me more suggestions, also the car would die quick when idling as soon as put the ac on.

TRlGGER

I had idle issues. At first it was the Coolant Temp Sensor. When i put the new one on it was better. Then after that i had Idle/Stumbling issues. Turned out to be problems with the intake. Make sure everything is secured and tight. Clean your TB, MAF, and idle control sensor. Throttle Body with Seafoam Deep Creep- MAF and Idle control valve with MAF Cleaner.

Candyredz28

iTrader: (4)

ok thanks, ill try that