low rpm problem HELP PLEASE!

[states1j]

My car will start up and run, but idles kinda low. Usually around 600 rpm. At first it will sound like it has a miss until I let it run for about 10 minutes or so. I chanded the plugs, checked the coils and the ecu. I have searched for other things on this but couldn't find any solid info. Also when i go to drive it and i press the gas down all the way it runs like crap. It shakes as it very slowly gets up to higher rpm, but once it starts boostin it is fine. I would really appreciate any help you could give me. Thanks!

 

[whitemike]

My car will start up and run, but idles kinda low. Usually around 600 rpm. At first it will sound like it has a miss until I let it run for about 10 minutes or so. I chanded the plugs, checked the coils and the ecu. I have searched for other things on this but couldn't find any solid info. Also when i go to drive it and i press the gas down all the way it runs like crap. It shakes as it very slowly gets up to higher rpm, but once it starts boostin it is fine. I would really appreciate any help you could give me. Thanks!

Check the timing? Check for codes?

 

[Satan]

Check all vacuum lines too...

 

[states1j]

timing was fine, and all vacuum hoses seem fine. My one IC pipe connector has some minor cracks but would that cause a major problem?

 

[mkiiichip]

timing was fine,

How did you check timing?

My one IC pipe connector has some minor cracks but would that cause a major problem?

No, 1jzs are map based, so you could disconnect the intercooler completely and have no effect on idle.

Check for codes?

???

 

[states1j]

with timing light

 

[mkiiichip]

Where did you find a specification for that? What was it set at?

 

[whitemike]

???

Is this @ me or is this re-asking the question?

 

[mkiiichip]

Re-asking, but now i realize there is no point. No help is needed in the first place.

 

[states1j]

sorry i had to go to work, my buddy was the one that checked the timing about a week ago so im not sure what it was at exactly or where he sourced the info. My check engine light isn't on, so is there a need to check for codes still?

 

[Albert]

Yes you can still have codes.

I would check you IACV. Might be stuck closed, or open. Or just not running right. Or take it off and make a block off plate like I did then crack the throtle open a tad: