What is it? - ZR-1 Net Registry Forums

secondchance · 04-20-2009

Mounted under to plenum are 2 electronic boxes.
One towards the back seems to be ignition related (has 2 connectors, one of them held in w/ 1/4" hex). Then there is another box towards the front w/ 3 electric connectors and a vacuum line. Anyone know what this is?

-=Jeff=- · 04-20-2009

Quote:

Originally Posted by secondchance

Mounted under to plenum are 2 electronic boxes.
One towards the back seems to be ignition related (has 2 connectors, one of them held in w/ 1/4" hex). Then there is another box towards the front w/ 3 electric connectors and a vacuum line. Anyone know what this is?

One bolted to the Plenum is the Ignition Module

Not sure what the other one is

Aurora40 · 04-20-2009

The ignition module should have three connectors. One on the back with the 1/4" hex, and two that clip on the underside of it.

The only thing with vacuum lines and an electronic connector that I can think of under the plenum is the switch that activates the secondaries.

Can you take some pictures?

Edit: Attached to the plenum, the other thing would be the MAP sensor. It has a single vacuum line, and like a 3-wire connector going to it. But it's on the backside of the plenum, you can remove it without removing the plenum first.

secondchance · 04-20-2009

Sorry! Too late. I pulled and installed the plenum 3 times in 2 days due to check valve and I am too tired to pull it again.

Jagdpanzer · 04-20-2009

Secondary vacum failure sensor?

secondchance · 04-20-2009

Hmmm...
May be it's one module but I mistook it.

secondchance · 04-20-2009

May be it's one module but some how I mistook it as 2 modules.

zr1don · 04-20-2009

The one with the vacume hoses is the "secondary port throttle vacuum actuator solenoid". It recieves an electrical signal from the ECM to open and close your secondary butterflies.

04-20-2009

Quote:

Originally Posted by secondchance

Mounted under to plenum are 2 electronic boxes.
One towards the back seems to be ignition related (has 2 connectors, one of them held in w/ 1/4" hex). Then there is another box towards the front w/ 3 electric connectors and a vacuum line. Anyone know what this is?

One is the secondary MAP sensor. The other is an ESC.

secondchance · 04-21-2009

Thanks.
I better order me a service manual.
I had one for 1991 but when I totaled my 91, I threw it out like an idiot.

04-20-2009	#1
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,717	What is it? Mounted under to plenum are 2 electronic boxes. One towards the back seems to be ignition related (has 2 connectors, one of them held in w/ 1/4" hex). Then there is another box towards the front w/ 3 electric connectors and a vacuum line. Anyone know what this is?

04-20-2009	#3
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,704	Re: What is it? The ignition module should have three connectors. One on the back with the 1/4" hex, and two that clip on the underside of it. The only thing with vacuum lines and an electronic connector that I can think of under the plenum is the switch that activates the secondaries. Can you take some pictures? Edit: Attached to the plenum, the other thing would be the MAP sensor. It has a single vacuum line, and like a 3-wire connector going to it. But it's on the backside of the plenum, you can remove it without removing the plenum first.

04-20-2009	#4
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,717	Re: What is it? Sorry! Too late. I pulled and installed the plenum 3 times in 2 days due to check valve and I am too tired to pull it again.

04-20-2009	#5
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,646	Re: What is it? Secondary vacum failure sensor?

04-20-2009	#6
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,717	Re: What is it? Hmmm... May be it's one module but I mistook it.

04-20-2009	#7
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,717	Re: What is it? May be it's one module but some how I mistook it as 2 modules.

04-20-2009	#8
zr1don Join Date: Jan 2006 Location: Temecula, CA Posts: 88	Re: What is it? The one with the vacume hoses is the "secondary port throttle vacuum actuator solenoid". It recieves an electrical signal from the ECM to open and close your secondary butterflies.

04-21-2009	#10
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,717	Re: What is it? Thanks. I better order me a service manual. I had one for 1991 but when I totaled my 91, I threw it out like an idiot.