for this i'm talking about the open vacuum line i don't know what it's for.
i have a d16z6 with a y8 intake.
i just swapped heads on it just another z6 and for some reason my redline is around 5k or so.

 

Post a clear picture showing the wires (colors) in the sensor connector.

The nozzle on the IM is for the EVAP system.

CEL codes? ECU?

 

How are you running without that nozzle plugged? Doesn't your idle jump like crazy? O.o. That should go to PCV valve that is on crank box under the manifold.

 

that's as far as i can pull it out. and no i don't get any cel codes.

 

lol i covered it back up but what does it plug into? and what about the sensor i know it plugs up to the back of my intake mani but i don't know where the other plug on it goes.

 

Then post the number of wires in the connector and their colors (main color/stripe color).

Does the CEL work?

 

What other plug?

 

well on the sensor there's one that plugs into the back of my intake mani and then on the other side there's just a open vacuum i tried to cover it but it wouldn't run with it covered i'll go take pictures here in a sec. and yes my cel works it's just not throwing me any codes though.

 

Block off that vacuum nozzle and then adjust the idle speed.

Post the wire colors of the sensor. It's probably the IAT sensor, but you need to make sure the connector matches with the sensor.

What car do you have?

 

the colors on it are both red with no writing it's still plugged in to whatever it should be which i believe is the wiring harness. and i have a 94 eg coupe and, how do i adjust the idle speed?

 

The sensor connector has two solid red (no stripe) wires?

See FAQs sticky for idle adjustment diagram.

 

yes.

 

No stock sensor that I am aware of has two solid red wires, so somebody did their own wiring. The stock IAT sensor for your car should have Red/Yel and Grn/Wht wires.

 

i see. well whatever it is i can't cover up one side cause i just figured i could cap it off but if i do it just dies after 30 seconds.

 

1) You don't want unfiltered air sucking through a disconnected vacuum nozzle into your engine.

2) Somebody has the idle speed adjusted very low to compensate for the disconnected vacuum nozzle.

3) Plug the nozzle, open the idle screw so the engine will run, and then adjust the idle speed.

 

kk thanks i'll let you know the outcome tomorrow.

 

4) Figure out what sensor connector is attached to the free sensor. If it's the IAT sensor and connector, properly install the sensor.

 

OBD1 ECUs wont throw a CEL for the evap purge solenoid (or any part of the evap system for that matter)

 

OP. Pictures would help.

 

Good point. I guess I meant in general to see whether there may be additional problems.

 

The two wires are probably because someone ran wiring for the IAT Because the Z6 doesn't have a spot for it on the intake manifold.

 

It looks like the charcoal canister purge solenoid.

 

OP: You have some real heavyweights helping you in this thread - with some patience you're sure to get the problem sorted! Remember to thank them if you do!

 

Also, the connector plugged into the evap purge solenoid is for the IAT sensor however, it appears to be spliced onto some red wire some I'm not sure if it was just extended or if someone used an IAT plug in place of a the purge solenoid plug. A further note on this, plugging the evap purge connector, or IACV connector into the IAT sensor will result in a fried IAT sensor as soon as the key is turned to ON (II)

 

OP what IAT are you using and where is it located?

And the EVAP purge (sensor with 2 red wires), where is it's vacuum line connected to the engine?



I think you mean the Y8 manifold doesn't have a spot for it. IIRC the Z6 has it located on one of the runners, like the rest of the OBDI engines. I could be wrong I'm kinda out of practice...