Testing the cold start injector?
Thread Starter
Intermediate
Joined: May 2007
Posts: 44
Likes: 0
From: Racine Wi
Testing the cold start injector?
Do you test the coldstart injector the same as the rest? Will it show the same resistance? Does it stay on like the others or does it only fire for a couple of seconds?
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
You can ohm the CSV to test the coil, but it will only show 4-6 ohms. Not as much as the other injectors. It is controled by the bimetal thermal switch located in the front of the intake manifold next to the CTS. The switch as a injector connector like the injectors. It times out after 8 seconds and is only active when engine temps are below 95*. I have my own way to test it working, but the link below is provided by AGENT 86. There is also a 5 amp fuse behind the DIC. Do a archive search for CSV under my name in C4 Tech. I have posted lots of time how it works.
http://members.shaw.ca/corvette86/Co...rt%20Valve.pdf
http://members.shaw.ca/corvette86/Co...rt%20Valve.pdf
Thread Starter
Intermediate
Joined: May 2007
Posts: 44
Likes: 0
From: Racine Wi
Thermal switch????
I do have one plugleft at the front of the motor I have no idea what it's for. That may be why it's not working. Do you have a pic of it? Does it go next to the CTS sensor sticking out the front of the manifold?
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Sorry, I have never taken a pic of it. If your standing behind the car. It is to the right of the CTS (IIRC). It has a square connector. If the CSV system is not working properly. You will have extended cranking times when cold. If you have a FSM, there is a pic of it in there.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Alright, I came through for you. This is a pic out my FSM. The end of the pencil shows where the CSV thermal switch is. Sorry, for using a pencil but it should get the point across. The switch should have a tan wire (ckt 832) and a purple wire (ckt 806) going to it. Use the link I provided in the first post to troubleshoot. It came from a FSM as well.
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Pro
Joined: Nov 2006
Posts: 727
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From: Ocean City Maryland
Have you ruled out the fuel pump and pulsator? I had the same issue and it turned out to be just that. I was chasing ghosts because I was afraid it was the fuel pump, but I changed it out and it was easier than I thought. Now the car is running excellent.
