Fuel starvation?? 1979 351M
11-24-2023, 05:02 AM
#11
The filter will always shoe bubbles (normal)
The carbon canisters just store fuel vapor and it then gets burned when the canister purge valve opens
There are ways to test the evaporative emissions components
They fall apart mostly (cracked housing) and then no longer hold the vapor is how they usually fail
If yours are there and hooked up, they are most likely okay
Are you still fighting a fuel starvation problem with your carb?
Check the float drop measurement (the tang on the float) that allows it to drop down far enough to let fuel in
The carbon canisters just store fuel vapor and it then gets burned when the canister purge valve opens
There are ways to test the evaporative emissions components
They fall apart mostly (cracked housing) and then no longer hold the vapor is how they usually fail
If yours are there and hooked up, they are most likely okay
Are you still fighting a fuel starvation problem with your carb?
Check the float drop measurement (the tang on the float) that allows it to drop down far enough to let fuel in
11-24-2023, 08:40 PM
#12
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Interesting and all informative
The filter will always shoe bubbles (normal)
The carbon canisters just store fuel vapor and it then gets burned when the canister purge valve opens
There are ways to test the evaporative emissions components
They fall apart mostly (cracked housing) and then no longer hold the vapor is how they usually fail
If yours are there and hooked up, they are most likely okay
Are you still fighting a fuel starvation problem with your carb?
Check the float drop measurement (the tang on the float) that allows it to drop down far enough to let fuel in
The carbon canisters just store fuel vapor and it then gets burned when the canister purge valve opens
There are ways to test the evaporative emissions components
They fall apart mostly (cracked housing) and then no longer hold the vapor is how they usually fail
If yours are there and hooked up, they are most likely okay
Are you still fighting a fuel starvation problem with your carb?
Check the float drop measurement (the tang on the float) that allows it to drop down far enough to let fuel in
searching
11-25-2023, 05:01 AM
#13
Absolutely it could be the ignition module or the stator in the distributor
No way to ever rid the filter of air bubbles (normal)
I run a Duraspark on my old Boss 302
Without a Rotunda Breakerless Ignition Tester, you are guessing as to the module and stator status
I was able to find an old one of those testers for 40 bucks on ebay
Save about 600 in grief
I have had to replace my ignition module on several occasions over the years
You might be experiencing vapor lock but I doubt it due to cold winter weather right now. Use fuel with no alky for a fillup or two to test.
Ether or starting fluid is one test
If it fires right up on Ether, your ignition system is okay
The modules would fail hot, and Ford used to make us put a heat lamp on the modules to test them and see if they died hot
You have an inline spark tester? Use one of those and watch it die.
Test for spark while trying to restsrt it with a can of Ether handy
No way to ever rid the filter of air bubbles (normal)
I run a Duraspark on my old Boss 302
Without a Rotunda Breakerless Ignition Tester, you are guessing as to the module and stator status
I was able to find an old one of those testers for 40 bucks on ebay
Save about 600 in grief
I have had to replace my ignition module on several occasions over the years
You might be experiencing vapor lock but I doubt it due to cold winter weather right now. Use fuel with no alky for a fillup or two to test.
Ether or starting fluid is one test
If it fires right up on Ether, your ignition system is okay
The modules would fail hot, and Ford used to make us put a heat lamp on the modules to test them and see if they died hot
You have an inline spark tester? Use one of those and watch it die.
Test for spark while trying to restsrt it with a can of Ether handy
11-25-2023, 12:19 PM
#14
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Trying
Absolutely it could be the ignition module or the stator in the distributor
No way to ever rid the filter of air bubbles (normal)
I run a Duraspark on my old Boss 302
Without a Rotunda Breakerless Ignition Tester, you are guessing as to the module and stator status
I was able to find an old one of those testers for 40 bucks on ebay
Save about 600 in grief
I have had to replace my ignition module on several occasions over the years
You might be experiencing vapor lock but I doubt it due to cold winter weather right now. Use fuel with no alky for a fillup or two to test.
Ether or starting fluid is one test
If it fires right up on Ether, your ignition system is okay
The modules would fail hot, and Ford used to make us put a heat lamp on the modules to test them and see if they died hot
You have an inline spark tester? Use one of those and watch it die.
Test for spark while trying to restsrt it with a can of Ether handy
No way to ever rid the filter of air bubbles (normal)
I run a Duraspark on my old Boss 302
Without a Rotunda Breakerless Ignition Tester, you are guessing as to the module and stator status
I was able to find an old one of those testers for 40 bucks on ebay
Save about 600 in grief
I have had to replace my ignition module on several occasions over the years
You might be experiencing vapor lock but I doubt it due to cold winter weather right now. Use fuel with no alky for a fillup or two to test.
Ether or starting fluid is one test
If it fires right up on Ether, your ignition system is okay
The modules would fail hot, and Ford used to make us put a heat lamp on the modules to test them and see if they died hot
You have an inline spark tester? Use one of those and watch it die.
Test for spark while trying to restsrt it with a can of Ether handy
Okay I will try some of these today . Some of this is beyond my level of knowledge , like the inline spark tester . The heat testing of the module I haven't heard of . It's been cold though. Have to run out and get some ether . I'll let you know what happens . Thank you again for your advice . It's much appreciated .
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11-25-2023, 04:35 PM
#15
The inline spark tester is just a bulb in short plug wire you can attach to the coil wire or a spark plug
It will just sit there and blink with the engine running. Parts stores or harbor freight has them
You watch it closely, when the engine dies, see if it loses spark as it is dying or if it is still sparking while it dies out
There is also a screw type you can listen to as it sparks like crazy and you can adjust the KV on those
I sometimes run them both in series (in the coil wire to the distributor) while I test a dying one
It will just sit there and blink with the engine running. Parts stores or harbor freight has them
You watch it closely, when the engine dies, see if it loses spark as it is dying or if it is still sparking while it dies out
There is also a screw type you can listen to as it sparks like crazy and you can adjust the KV on those
I sometimes run them both in series (in the coil wire to the distributor) while I test a dying one
11-25-2023, 08:27 PM
#16
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No luck
The inline spark tester is just a bulb in short plug wire you can attach to the coil wire or a spark plug
It will just sit there and blink with the engine running. Parts stores or harbor freight has them
You watch it closely, when the engine dies, see if it loses spark as it is dying or if it is still sparking while it dies out
There is also a screw type you can listen to as it sparks like crazy and you can adjust the KV on those
I sometimes run them both in series (in the coil wire to the distributor) while I test a dying one
It will just sit there and blink with the engine running. Parts stores or harbor freight has them
You watch it closely, when the engine dies, see if it loses spark as it is dying or if it is still sparking while it dies out
There is also a screw type you can listen to as it sparks like crazy and you can adjust the KV on those
I sometimes run them both in series (in the coil wire to the distributor) while I test a dying one
Thank you for your help .
Searching
