cis injection wiring harness
 

i have a couple ox extra wires that im not sure where to attach, and a couple of sensors on the cis system that are open, so i was wondering if anyone has a cis wiring diagram that would be able to tell me which wire goes where, (maybe a color matching one)

thanks for the help
scott

Electrical wiring and color code......
 

Scott,

Could you post a picture of the wires and color. Without knowing which wires you are talking about, and location would help, it is difficult to give you any meaningful advise. Then it would be easy to refer to the schematic diagram/s. Thanks.

Tony

This is for a 77 but it may help.
http://forums.pelicanparts.com/uploa...1314056028.jpg

911lvr, i owe you one, very helpful diagram indeed.

tony, i have two wires both with 2 prong connectors unconnected and 2 ports that fit these connectors on the cis system. i think the two ports on the cis system are on the back of the throttle areahttp://forums.pelicanparts.com/uploa...1314061719.jpg

those are the last two ports that i was talking about (the last two of my knowledge)

thanks
scott

inless im thinking of something else, i think think the coldstart valve (locater on intake runner #2, uses a grey connector and im not sure what the safety switch is, som some of the things might be different

so heres my current situation, there was a wire with a grey 2 prong plug that i plugged into the grey plug on the wamup regulator (im 99% sure about this connection being correct because I remember that same wire having a kink in it before).

I then plugged the only wire with a 3 prong connector (that im aware) into the only thing with a three prong connector that im aware of (which was the back of the throttle area).

I then plugged the black wire with a black 2 prong connector that was on the passenger side of the engine bay into the Aux air regulator (this move was a guess but i just figured it would be color coordinated).

This then leaves me with two wires both with 2 prong connectors and 2 2prong connectors on teh injection system (the ones shown in the pictures above), and these two wires:http://forums.pelicanparts.com/uploa...1314064004.jpg
http://forums.pelicanparts.com/uploa...1314064016.jpg
http://forums.pelicanparts.com/uploa...1314064028.jpg
http://forums.pelicanparts.com/uploa...1314064038.jpg

as you can see, one connector (the one on teh passenger side of the engine compartment) is olive green and the one on the drivers side is black.

so this means that there are 5 total connections, is this correct?

thanks
scott

anyone, cis wiring harness?

CIS engine wire harness.......
 

Scott,

You should have five (5) similar 2-wire plugs for your '80 SC namely:

WUR (driver side)
AAR (passenger side)
CSV (engine rear side)
AFS (engine rear side)
FV (engine rear side).......for '80-83 SC only.

Which of these plugs do you have probslem identifying?

Tony

tony, i thought there were only 4 two wire plugs but i just found the blue one (the fifth)

i have 3 unattached wires( the blue plug one, the olive colored one, and a black one on the passenger side)

heres what i have so far
WUR (driver side) - done
AAR (passenger side) - done
CSV (engine rear side) - not hooked up
AFS (engine rear side) - not hooked up
FV (engine rear side).......for '80-83 SC only. - not hooked up

if you happen to know which color wire goes with which component that would be a great help
thanks for the time and effort
-scott

heres my guess for the remaining three (though i know better then to hook up based on guesses). I would say:

the wire with the blue connector goes to the cold start valve

the wire with the black connector goes to the frequency valve

the wire with the green connector goes to the air flow sensor

as a result of there being two different black 2 wire plugs in the cis wiring, i feel the need to differentiate between the two by saying that the one i am talking about that i think goes to the frequency valve comes from this 6 pin connector by the rear driver's side shock towerhttp://forums.pelicanparts.com/uploa...1314085048.jpg
(the black plastic connector is removed in this image)

Wiring on these cars give me such a huge headache and make me want to rewire the entire car with proper grounds and a distinct colors.

heres an old picture i have of the motor when it was out of the car about 1 year ago.http://forums.pelicanparts.com/uploa...1314130432.jpg
http://forums.pelicanparts.com/uploa...1314130445.jpg

my main questing is, to me, it looks like both the plug on the wire and the connector on the are that same light green color, and now, the closest thing i cant find any wire with that color, the closest one i have to it is an olive/dark green. but maybe it is the same plug, my sight is just failing my or something?

blue to cold start valve, green to sensor plate switch, black to frequency valve, another black to aux air regulator, gray to warmup reg.

The black to the FV, needs to be the one coming from the O2/throttle switch harness. If you plug in a" black" plug to it, and it gets +12v, a hole burns in FV near the plug after a few miles and it sprays a lot of fuel out.

I just posted these in another thread, maybe they will help you. The car is a 1977 2.7L CIS with heater blower removed.

P-Car Electrical 1977 pictures by kach22i - Photobucket
http://i184.photobucket.com/albums/x...977/stuff2.jpg
http://i184.photobucket.com/albums/x...977/stuff3.jpg
http://i184.photobucket.com/albums/x...977/stuff1.jpg

The other side: heater blower removed.
http://i184.photobucket.com/albums/x...977/stuff4.jpg

john, thanks a ton for this, this is what i have been looking for. by my guessing, i actually have it set up this way but i was just looking for this confirmation
thanks
scott

Electrical connections........
 

Scott,

The two (2) plugs that commonly get interchanged are the CSV and AFS plugs. A quick way to identify or test these plugs is by inspecting the wire colors. The AFS (air flow switch) has 2 brown wires. This is the only plug in your CIS engine harness that has all brown colored wires.

Tony

ok, thanks for the help. i think i have all the wiring worked out.

I just started the car up a couple of times and the first time, the engine would idle at 2k rpms, and then drop down to 450 rpms, and then go back up to 2k, and this kept happening. the next times i tried, it would just start up straight to 2500 rpms, and then drop within a second or two to 450 rpms, where it would stay with the flapper popping open every couple seconds

from what i know, i would say these are the symptoms of running lean, but even when i turn the idle screw out, nothing happens, which makes me wonder if one of the components in the fuel system is broken. i do happen to have the fuel pressure testing gauge, so i will go through all the tests and post the results.

thanks
scott

The hunting idle is from an air leak. Most likely this will go away once it is all warmed up and connections expand.

The the fuel mixture with Allen wrench adjustment and idle speed screw are two different things. You might know that already, but your post is a little jumbled and I cannot tell.

Yes, very odd that the idle speed screw (with big spring behind it) does nothing. I don't know what to make of that.

wait, is the flathead screwdriver on the left side of the throttle the peed screw or the mixture? and where is the allen screw you speak of, and what does that do?

thanks
scott

ok, well, i figured those questions out by looking around. as for the huntung idle, io cant get the engine running long enough to heat it up. i think there is a lack of gas to the engine, so either the pump is not cranking at full power, of the fuel filter is clogged, of the accumulator is bad, or the injectors are clogged.

when checking fuel pressure with the gauge, do you run the engine, or just the pump? if you just run the pump, how do you get just the pump running?

thanks
scott