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Hi. I have a 1958 Corvette with a 7014800R Fuel Injection unit on it. I am having problems with it when starting it cold. The only way it will start up is if I spray some brake cleaner into the air meter side, and then it starts right up. Not sure what the problem is, as I have changed all of the gaskets, as well as the main diaphragm. I also changed the solenoid micro switch. Is it true the micro switch only helps with hot starts, and not cold starts? I have the 1100908 distributor as well. Any help or thoughts are appreciated.
You have a wiring error with regard to the starting solenoid. Current for the solenoid is supposed to pass through the red/black microswitch for cold starting. Since that switch has only a single connection on your FI, that clearly isn't possible. What is possible and likely is that your starting solenoid is NOT being energized during cranking.
Trace and correct the wiring and your starting issues should go away.
Also, just an observation, the link rod for your fast idle cam looks wonky.
Last edited by jim lockwood; Jun 26, 2022 at 12:07 PM.
Great catch on the missing wire, that is why you get paid the big bucks!
in the first pic you can see where the wire should go.
I always learn something new on this forum.
You have a wiring error with regard to the starting solenoid. Current for the solenoid is supposed to pass through the red/black microswitch for cold starting. Since that switch has only a single connection on your FI, that clearly isn't possible. What is possible and likely is that your starting solenoid is NOT being energized during cranking.
Trace and correct the wiring and your starting issues should go away.
Also, just an observation, the link rod for your fast idle cam looks wonky.
Hi Jim. Thanks for your reply. I told my mechanic the same thing, but from what he read in one of the Fuel Injection manuals, he thought that connecting the second wire, or hot wire to the micro switch was just for Hot Starts, not Cold Starts. I guess his interpretation was incorrect. I'll definitely try hooking up the wire tomorrow at his shop. Any recommendation as where I should run the hot wire from? I have read online that some people take it from the coil, or even the starter.
What you need to verify or change is all of the following:
1. The wire from the starting solenoid connects to one of the two microswitch terminals. It doesn't matter which one.
2. There is continuity from the other microswitch terminal to the harness connector terminal at the top of the "T".
3. There is continuity from the other top half of the harness connector "T" down to the starter "S" terminal (the one closest to the engine block)
When everything is properly wired and connected, you can gently place your finger under the plunger/armature of the starting solenoid and feel it move up about 1/8" when a helper turns the ignition key to the "START" position.
If my word description isn't clear, don't be shy about asking for clarification.
What you need to verify or change is all of the following:
1. The wire from the starting solenoid connects to one of the two microswitch terminals. It doesn't matter which one.
2. There is continuity from the other microswitch terminal to the harness connector terminal at the top of the "T".
3. There is continuity from the other top half of the harness connector "T" down to the starter "S" terminal (the one closest to the engine block)
When everything is properly wired and connected, you can gently place your finger under the plunger/armature of the starting solenoid and feel it move up about 1/8" when a helper turns the ignition key to the "START" position.
If my word description isn't clear, don't be shy about asking for clarification.
Jim
Hi Jim,
Thanks again for your help. I'll go to my friend's shop tomorrow and give everything you said a try. I'll let you know how we made out afterwards.
Quote:
Originally Posted by plaidsideView Post
Great catch on the missing wire, that is why you get paid the big bucks!.
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Quote: Jim Lockwood...
Huh? Wait..... what? Big bucks? Where are they? I'm waiting.....
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Plaidside, I agree with you on Jim's great catch on the missing wire. His willingness to help, teach, advise and share his knowledge certainly deserves the Big Bucks. But mostly his use of understandable scientific and technical language is key.
Gary
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Quote: Jim Lockwood
Also, just an observation, the link rod for your fast idle cam looks "WONKY". Gary
You have a wiring error with regard to the starting solenoid. Current for the solenoid is supposed to pass through the red/black microswitch for cold starting. Since that switch has only a single connection on your FI, that clearly isn't possible. What is possible and likely is that your starting solenoid is NOT being energized during cranking.
Trace and correct the wiring and your starting issues should go away.
Also, just an observation, the link rod for your fast idle cam looks wonky.
Hi Jim. Just wanted to thank you for your help. After debating with my mechanic for 30 minutes, I finally convinced him to give this a try. I also tried last week to get him to try it, since I saw photos of other FI Vets that had the 2nd wire hooked up to the micro switch. I printed out your instructions, convinced him to read it and try it. After everything was connected properly, the car started on the first try. He is a believer now.
7014800R FI Unit Cold Start problems
