Loss power and hiccups
Thread Starter
Navigator
Joined: Apr 2022
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Loss power and hiccups
Hello guys I've a new problem with my C3. I've had some problem with it for the carburation and my mechanic has needed to change my "quick fuel" carburetor with new one, replace all the cables sparks and upgrade ignition points to an electronic. Now the car go very well with a great minimum but some time it loses power for a second or two going sobbing, during this second the radio stay on and all the light stay on. Normaly this doesn't happen at high RPM or when I do a full throttle acceleration, this happen with normal drive condition and during a costant acceleration. I use the car only in the weekend and for the last 3 exits this doesn't happen anymore but today has started another time, in one hour of exit it's happened 3 or 4 times. Before the works this never has happened, so I think that the carbureator or the ignition upgrade could have some problem, but my mechanic dosen't have idea. Let me say that for the USA cars he is one of the best in Italy so I can't find another mechanic 
Someone of you have an idea?
Thanks and sorry for my bad english :|
Someone of you have an idea?
Thanks and sorry for my bad english :|
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,147
Likes: 4,258
From: US-PNW
This sounds like an electrical problem rather than carburetor since you have good acceleration and high rpm. Does it happen at idle, or only when moving? Do you know the brand of the electric ignition? Pics of the distributor and carburetor may help diagnose the issue.
Thread Starter
Navigator
Joined: Apr 2022
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Hello, thanks for reply, this happens only when the car is moving the carburetor is another "quick fuel" brand new I think 600cfm, tomorrow I'll take a photo. For the distributor I don't know the brand, but tomorrow I'll try to discover it and take some photos. So for you is impossible that could be something wrong in the new carburetor?
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,147
Likes: 4,258
From: US-PNW
Hello, thanks for reply, this happens only when the car is moving the carburetor is another "quick fuel" brand new I think 600cfm, tomorrow I'll take a photo. For the distributor I don't know the brand, but tomorrow I'll try to discover it and take some photos. So for you is impossible that could be something wrong in the new carburetor?
Is the engine of a similar age as the car or is it a more modern replacement with some computerized components?
Because the engine idles and accelerates fine with good high rpm characteristics, I don't think you have a fuel problem. You also mentioned, "during this second the radio stay on and all the light stay on" which sounds like an electrical issue. Can you explain this a little more?
Thread Starter
Navigator
Joined: Apr 2022
Posts: 9
Likes: 0
What year Corvette are we talking about?
Is the engine of a similar age as the car or is it a more modern replacement with some computerized components?
Because the engine idles and accelerates fine with good high rpm characteristics, I don't think you have a fuel problem. You also mentioned, "during this second the radio stay on and all the light stay on" which sounds like an electrical issue. Can you explain this a little more?
Is the engine of a similar age as the car or is it a more modern replacement with some computerized components?
Because the engine idles and accelerates fine with good high rpm characteristics, I don't think you have a fuel problem. You also mentioned, "during this second the radio stay on and all the light stay on" which sounds like an electrical issue. Can you explain this a little more?
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,147
Likes: 4,258
From: US-PNW
Hopefully someone more familiar with electronic distributors can chime in as my cars only use mechanical points. That said, I believe a resistor is not to be used on an electronic distributor and as a component heats up the resistance gets higher. Your resistor wire may be the source of your issue, but I'm just guessing.
Burning Brakes
Joined: Jan 2003
Posts: 961
Likes: 275
From: Frederick MD
It’s one of two things.
1. Loss of ignition.
2. Loss of fuel.
Perhaps my understanding of the issue is incorrect but my as I’m reading this it sounds like the car is coughing and sputtering but not outright dying. If thats the case take a good hard look at the fuel system. Check the fuel sock in the tank. Make sure your rubber lines aren’t breaking down from ethanol and age. Make sure your fuel pump is making the required fuel pressure.
If this is an ignition related cough and sputter then until it dies outright its gonna be hard to find unless a visual inspection shows you a bad wire. Might also be an ignition switch.
1. Loss of ignition.
2. Loss of fuel.
Perhaps my understanding of the issue is incorrect but my as I’m reading this it sounds like the car is coughing and sputtering but not outright dying. If thats the case take a good hard look at the fuel system. Check the fuel sock in the tank. Make sure your rubber lines aren’t breaking down from ethanol and age. Make sure your fuel pump is making the required fuel pressure.
If this is an ignition related cough and sputter then until it dies outright its gonna be hard to find unless a visual inspection shows you a bad wire. Might also be an ignition switch.
Thread Starter
Navigator
Joined: Apr 2022
Posts: 9
Likes: 0
It’s one of two things.
1. Loss of ignition.
2. Loss of fuel.
Perhaps my understanding of the issue is incorrect but my as I’m reading this it sounds like the car is coughing and sputtering but not outright dying. If thats the case take a good hard look at the fuel system. Check the fuel sock in the tank. Make sure your rubber lines aren’t breaking down from ethanol and age. Make sure your fuel pump is making the required fuel pressure.
If this is an ignition related cough and sputter then until it dies outright its gonna be hard to find unless a visual inspection shows you a bad wire. Might also be an ignition switch.
1. Loss of ignition.
2. Loss of fuel.
Perhaps my understanding of the issue is incorrect but my as I’m reading this it sounds like the car is coughing and sputtering but not outright dying. If thats the case take a good hard look at the fuel system. Check the fuel sock in the tank. Make sure your rubber lines aren’t breaking down from ethanol and age. Make sure your fuel pump is making the required fuel pressure.
If this is an ignition related cough and sputter then until it dies outright its gonna be hard to find unless a visual inspection shows you a bad wire. Might also be an ignition switch.
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I had a simikar issue and it was a bad ignition switch. Yours may need a slight adjustment. Check your engine to frame grounds and the grounds for the battery. Could be corrosion is causing a power loss enough to shut down the iginition system