 "Trailer-hitching" bucking problem, Rapid detrioration from running perfectly |
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| Lockwodo |
 May 1 2022, 10:53 AM
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#61
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Member  Group: Members Posts: 202 Joined: 23-December 21 From: Santa Cruz, Californnia Member No.: 26,193 Region Association: Northern California 
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QUOTE(mgphoto @ May 1 2022, 09:06 AM)  QUOTE(mgphoto @ Apr 12 2022, 02:49 PM) Clean and check the FI points in the base of the distributor. This takes 5 minutes to check, you will need to retime the distributor. Those points are low power, oil and dirt will not burn off like regular ignition points. I'm not seeing misses on two cylinders at once, but cleaning those trigger points and checking for disty shaft wobble and smooth advance action are all things I need to do. The disty has a Crane ignition module and stock coil, and I don't know how well it's working, but a weak spark will cause erratic missing. |
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| mgphoto |
May 1 2022, 02:02 PM
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#62
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"If there is a mistake it will find me" Group: Members Posts: 1,341 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
QUOTE(Lockwodo @ May 1 2022, 09:53 AM) QUOTE(mgphoto @ May 1 2022, 09:06 AM) QUOTE(mgphoto @ Apr 12 2022, 02:49 PM) Clean and check the FI points in the base of the distributor. This takes 5 minutes to check, you will need to retime the distributor. Those points are low power, oil and dirt will not burn off like regular ignition points. I'm not seeing misses on two cylinders at once, but cleaning those trigger points and checking for disty shaft wobble and smooth advance action are all things I need to do. The disty has a Crane ignition module and stock coil, and I don't know how well it's working, but a weak spark will cause erratic missing. I would install the standard points and condenser for testing. Your rotor shaft wobble could be a detached circlip which holds the rotor to the mechanical advance. Injectors fire in pairs, 2 behind closed valves, 2 behind open valves, don’t remember off hand if it’s left and right or forward rearward injector pairs. Low speed bucking is usually associated with an advance problem or TPS and a combination of the two. High speed is usually the injector pairs not firing at the correct time. |
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| ChrisFoley |
May 2 2022, 04:12 AM
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#63
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I am Tangerine Racing Group: Members Posts: 7,937 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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I remember having trouble with old Crane optical systems. Much prefer Pertronix as a points replacement.
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| Lockwodo |
May 24 2022, 07:17 AM
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#64
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Member Group: Members Posts: 202 Joined: 23-December 21 From: Santa Cruz, Californnia Member No.: 26,193 Region Association: Northern California
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QUOTE(mgphoto @ May 1 2022, 09:06 AM) QUOTE(mgphoto @ Apr 12 2022, 02:49 PM) Clean and check the FI points in the base of the distributor. This takes 5 minutes to check, you will need to retime the distributor. Those points are low power, oil and dirt will not burn off like regular ignition points. Right you are, mgphoto. My intermittent "bucking" problem was due to the distributor trigger points. Why do I always find what I'm looking for in the last place I look? I pulled the points and they were oily and cruddy which was causing intermittent problems. Cleaned up the points and re-installed and now it starts up, idles and revs up great. I have a distributor rebuild or 123 Ignition in my future, but for now, (IMG:style_emoticons/default/piratenanner.gif) |
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| mgphoto |
May 24 2022, 04:30 PM
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#65
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"If there is a mistake it will find me" Group: Members Posts: 1,341 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
Glad it worked out.
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