Hesitation/lack of power - Page 2

Bill Bogues · 05-01-2016, 09:37 PM

accelerator pump. they shrink after sitting up for a while.

MikeMoller · 05-01-2016, 11:07 PM

Quote:

Originally Posted by bill bogues

accelerator pump. They shrink after sitting up for a while.

x2

nwebber · 05-02-2016, 01:15 AM

I will be replacing the coil wires and going through both carbs. I have 38 degrees of timing in a locked distributor. Thanks for the replies

Larry Hill · 05-02-2016, 11:07 AM

Verify TDC and "0" on the timing mark.

glen myers · 05-03-2016, 11:52 AM

Change the coil wire!

???

explain?

Adger Smith · 05-03-2016, 12:08 PM

What one wire in the ignition system causes the most resistance when it wears out or becomes ineffective at passing electrical current? It is the one wire that passes all 8 electrical impulses of the engine firing cycle. That one wire is used 8 times more than the normal spark plug wire. When that wire breaks down it is very similar to having a coil that goes bad. The spark energy is used up jumping inside the wire, just like a large gap resistor plug. If you ever find a bad one split it open and you can usually pour out the carbon/graphite that has turned to a powder or burned up. Test the resistance and you will see the bad coil wire is way up in resistance per foot than one of the other plug wires.
Coil wires should be replaced frequently.
He did mention that it came back alive after a higher RPM. If it had low spark energy getting to the plugs at low RPM the coil wire can cause that.
Oh, Low spark energy will make you think it is carb related because it shows up as rich at the plugs.

glen myers · 05-03-2016, 01:23 PM

^^
interesting. thanks. now I got something else to check.....
chasing a power issue. when I let the transbrake go, rpm's fall 4-500 before starting to climb back up. Killing my 60 ft. Have swapped trans, convertor, carbs, ignition....
If I had any hair i'dve pulled it out....
(327-250 PG SS combo)

05-01-2016, 09:37 PM	#11
Bill Bogues Member Join Date: Apr 2005 Location: Bethany La. Posts: 318 Likes: 83 Liked 169 Times in 52 Posts	Re: Hesitation/lack of power accelerator pump. they shrink after sitting up for a while. __________________ Bill Bogues 4696 STK

05-02-2016, 01:15 AM	#13
nwebber Junior Member Join Date: May 2007 Location: springfield OR Posts: 66 Likes: 1 Liked 35 Times in 2 Posts	Re: Hesitation/lack of power I will be replacing the coil wires and going through both carbs. I have 38 degrees of timing in a locked distributor. Thanks for the replies __________________ Norm Webber

05-02-2016, 11:07 AM	#14
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,276 Likes: 1,635 Liked 9,450 Times in 1,955 Posts	Re: Hesitation/lack of power Verify TDC and "0" on the timing mark. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

05-03-2016, 11:52 AM	#15
glen myers Junior Member Join Date: Aug 2005 Location: GAINESVILLE,VA Posts: 81 Likes: 0 Liked 2 Times in 2 Posts	Re: Hesitation/lack of power Change the coil wire! ??? explain? __________________ Glen Myers 126 GT/HA used to Now retired

05-03-2016, 12:08 PM	#16
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,348 Likes: 434 Liked 676 Times in 260 Posts	Re: Hesitation/lack of power What one wire in the ignition system causes the most resistance when it wears out or becomes ineffective at passing electrical current? It is the one wire that passes all 8 electrical impulses of the engine firing cycle. That one wire is used 8 times more than the normal spark plug wire. When that wire breaks down it is very similar to having a coil that goes bad. The spark energy is used up jumping inside the wire, just like a large gap resistor plug. If you ever find a bad one split it open and you can usually pour out the carbon/graphite that has turned to a powder or burned up. Test the resistance and you will see the bad coil wire is way up in resistance per foot than one of the other plug wires. Coil wires should be replaced frequently. He did mention that it came back alive after a higher RPM. If it had low spark energy getting to the plugs at low RPM the coil wire can cause that. Oh, Low spark energy will make you think it is carb related because it shows up as rich at the plugs. __________________ Adger Smith (Former SS) Last edited by Adger Smith; 05-03-2016 at 12:13 PM. Reason: SP & Add

05-03-2016, 01:23 PM	#17
glen myers Junior Member Join Date: Aug 2005 Location: GAINESVILLE,VA Posts: 81 Likes: 0 Liked 2 Times in 2 Posts	Re: Hesitation/lack of power ^^ interesting. thanks. now I got something else to check..... chasing a power issue. when I let the transbrake go, rpm's fall 4-500 before starting to climb back up. Killing my 60 ft. Have swapped trans, convertor, carbs, ignition.... If I had any hair i'dve pulled it out.... (327-250 PG SS combo) __________________ Glen Myers 126 GT/HA used to Now retired