extra plug on harness

[sho4life]

so i found a plug, its grey squared shape but inside it it is oval with a red stripe on top. what's it for? its not plugged in to anything and my car runs like crap. is this why? i know a guy told me there are two smog plugs that have a fuse type block in them and they will make the car run like crap if unplugged. well i found the two and they are plugged in so im wondering if this mystery plug i have not in use should be plugged also.. help!!!

 

[kevinspann]

What kind of car? ATX or MTX

What year?

Picture of the plug? It sounds like one I found on both of my cars. Not plugged in.

 

[sho4life]

92 mtx

 

[sho4life]

i dont know how to put pics up on here.

 

[rbruso]

The simplest way to post pictures is to host them somewhere (such as at shospeed.com) then link them here with the tag.

Full details here: [url]http://www.shoforum.com/faq.php?faq=vb3_reading_posting#faq_vb3_attachments[/url]

 

[rbruso]

92 mtx

Also, is it a California emissions car (big honkin' EGR valve on the intake near the throttle body)?

I know your location is "midwest" but I've seen them wander farther afield than that

 

[sho4life]

it is not a egr car for sure

 

[jonheese]

How 'bout a rough approximation where you found it? Behind the intake? In front of the alternator? Behind the headlight? Under the oilpan? etc.

So far it sounds exactly like ~30-40 different connectors under the hood.

 

[sho4life]

its under the brake booster

 

[jonheese]

How many pins? Can you tell what wire colors are coming out of it?
(Or just post a pic )

 

[hawkeye18]

inside it it is oval with a red stripe on top.

This means you need to be a little more specific. There are about eleventy billion oval plugs in the engine compartment of a SHO. And about 50 under the brake booster.

 

[jonheese]

I went out and looked under my brake booster on my two '90s, and I didn't see any square/rectangular grey connectors with an oval recess in that area. A handful of black ones there, and a handful of round grey connectors there, but nothing that matched the description.

May be a Gen2-only connector?

A pin count and/or wire color report and/or picture would help immensely.

 

[VortecGT]

Cruise control?

 

[sho4life]

im thinking a gen 2 connector too because i found an extra harness and it didnt have it. ill be back on here in twenty mins to describe it more in detail

 

[sho4life]

three wire, brown/green brown/white taniish /red . also it isnt not on the main harness but on a harness that connects the oil sender, temp light, o2 sensor, and a few others. when i mentioned oval before i said oval inside a rectangular plug. and no there are not a gazillion rectangular plugs under the brake booster.

 

[hawkeye18]

well I can't find crap on it, but all I have is the 93 EVTM with me and I know there were some wiring changes between 92 and 93 so...

all I've been able to find is that Brown / white is a voltage reference to at least the BARO sensor and the TPS, that Brown / green is EGR (which you don't have), and Tan / red goes to the EEC test port. So you might want to probe the BR/WH wire and see if you're getting 5V... and if you are, that means something somewhere isn't.

 

[sho4life]

ok, it must be a 92 only and im taking a picture and posting it very damn soon. someone will tell me what this is hopefully

 

[DavesNOThereMAN]

Its a factory test port or some crap. Every SHO car I came across has the same thing just dangling. I also have had 93 and 94 MTX shos and they have the same plug dangling around not connecting to anything. There are a few of them in the car. If you do a search someone explained it already.

 

[Eric VerValin]

I know the one your talkin about.... I have the same one hanging too... let me dig thru my pics and let me know if its it...


Edit: Is it this one?




Mine's been hanging like that since 92... no worries man..

 

[sho4life]

ok, thats it.. so since its useless on to the next possible problem... man this car is a pain in the ass to diagnois