I just rebuilt my s5 n/a and started it and its tps was all off. So as i looked over everything I found this little plug broken under my grounding point behind the upper intake manifold. So im trying to figure out what this little thing is any help will be great.

 

 

What are the wire colors to the broken plug.

 

Green and red

 

I just hope its the reason i cant idle

 

Two wires, one being Green and the other being Red or one Green/Red wire? If there are two wires then they will likely have a stripe on it which is important in identifying the plug.

http://www.mazdatrix.com/86-92Electrical-Engine.htm

 

I finally figured it out its the air intake temperature sensor. Knowing that would that stop my car from idling?
Cause the car will start up the check engine light would come on and die immediately if I didn't keep my foot on the gas.

 

Wiring diagram says it has a Green wire and a Brown/Black wire but it's a moot point now. Not sure it would affect your idling. Do you know if your TPS is set right and if not do you know how to properly set it.

 

No i do not i just the air fuel mixture on top of my throttle body.

 

W/the engine as hot as it can get the Green/Red wire of the TPS needs to measure 1 volt w/key to on. And make sure the sensor w/the broken prong is reinstalled or there will be a large vacuum leak which can cause the engine to die. And an improperly set CAS/timing can cause running problems as well.

 

What is Cas stand for?

 

Crank Angle Sensor.

 

Okay thankyou and i checked my vacuum lines and every thing looks great i even replaced all the lines that seemed weak or loose

 

Eyeing things is not a proper method for checking vacuum leaks. Either you need to pressurize the system to look for leaks or you'll have to have the engine running and spray carb cleaner around the engine and see if the idle changes. If it does then you found a leak.

 

yes, it'll probably run like crap without that sensor. and yes, that's the air intake temp sensor.

 

Thanks i just baught a new on hurt my wallet a bit... But anyway today i unplugged the the air filters sensor on the side of the intake and the car ran even idles now, it just smokes out the neighborhood now.

 

Another question where does the ground wire on top of the bellhousing connect to, I can't seem to find its hookup point, and what does it do


1989 s5 na

 

the firewall. it grounds things

 

Found it

 

no, it will idle fine without that IAT sensor, the important air intake temp sensor is located inside the AFM. without it in the intake is another story though, large vacuum leak would make it idle like crap.

 

Okay I'm finding out that I'm having trailing ignition coil problems and the car won't start i have no clue what so ever to do about that.

 

Car should start w/o the need for the trailing coil. How did you arrive at the conclusion you were having problems w/this coil? Make sure the engine is not flooded.

 

I am checked coils there fine unflooded the engine...i hope and now all signs are pointing 2 afm cause when afm is unplugged it idles when its plugged in it dies in record time.

 

W/the AFM plugged in jumper the fuel check connector and try to start the car.

 

gotta picture of the fuel check connector? And thankyou ill try it in the morning.