 Carb throat popping at speed, New Problem!!! |
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| LetoAtreides |
 Aug 15 2008, 10:38 PM
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#1
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Member  Group: Members Posts: 86 Joined: 15-May 07 From: Half Moon Bay, California Member No.: 7,739 Region Association: None  |
Ok, so I know I've posted this before, but I still cant figure it out, and I need to know all of the possible circumstances under which this condition occurs.
One of the throads on my dual carbs is excessively lout at speed. It sounds like pop-pop-pop. Any ideas? |
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| LetoAtreides |
Aug 23 2008, 05:28 PM
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#2
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Member Group: Members Posts: 86 Joined: 15-May 07 From: Half Moon Bay, California Member No.: 7,739 Region Association: None |
idle jet is 55
throat is 40 sparks are nice and blue. Tried driving it a bit today and no backfires while driving it. It only backfires when sitting still and high-revving. |
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| ArtechnikA |
Aug 24 2008, 07:09 AM
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#3
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
QUOTE(LetoAtreides @ Aug 23 2008, 07:28 PM)  Tried driving it a bit today and no backfires while driving it. It only backfires when sitting still and high-revving. So don't do that. Seriously - it's not a part of the normal driving regime. If it idles fine and drives fine, you're done. I think you may be seeing the indications of a misfire, which is its own separate set of problems (and standard solutions.) It mught even just be residual crap burning of the plugs from being fouled earlier. If you have to go out of your way to create the problem by artificially running the engine at no load - don't do that. You're done. |
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Posts in this topic
LetoAtreides Carb throat popping at speed Aug 15 2008, 10:38 PM
r_towle well, its lean.
How it has become lean could be al... Aug 15 2008, 11:13 PM drive-ability
Ok, so I know I've posted this before, but I ... Aug 15 2008, 11:14 PM Elliot Cannon If it accelerates OK but starts popping when you a... Aug 15 2008, 11:23 PM ArtechnikA also - check for bad, bent, or misaligned linkage.... Aug 16 2008, 09:10 AM LetoAtreides Update!
I adjusted the linkage on one side, a... Aug 16 2008, 04:57 PM LetoAtreides So i think I've pretty much fixed my popping p... Aug 20 2008, 12:56 PM r_towle What is your timing set at???
Rich Aug 20 2008, 01:11 PM LetoAtreides I timed it using an electronic tach. I rotated th... Aug 20 2008, 02:15 PM ArtechnikA Normally I am a very patient person but this has p... Aug 20 2008, 03:26 PM Mark Henry I understand how Rich feels, the T4 doesn't li... Aug 20 2008, 03:39 PM LetoAtreides Sorry for testing your patience, ArtechnikA, let m... Aug 20 2008, 05:26 PM
ArtechnikA
I'm 19 years old and learning to work on my o... Aug 20 2008, 07:07 PM LetoAtreides Thanks for the info.
How much is a smidge? is i... Aug 20 2008, 10:32 PM r_towle I will try to clarify.
Step one.
Static time the ... Aug 20 2008, 10:52 PM LetoAtreides Ok, cool.
I checked the points and dwell angle ve... Aug 20 2008, 11:03 PM ArtechnikA 27, 28 - that's probably as close as most of u... Aug 21 2008, 06:47 AM rhodyguy i suggest you limp or tow your car to High Perfoma... Aug 21 2008, 09:15 AM LetoAtreides
Yeah, I've done business with Rich, and he... Aug 21 2008, 01:39 PM LetoAtreides Ok, so I timed my car by the book, and it idles a ... Aug 22 2008, 05:17 PM ArtechnikA
Ok, so I timed my car by the book, and it idles a... Aug 22 2008, 06:28 PM LetoAtreides Dellorto:
main jet 36
Venturii 140
I don't kn... Aug 22 2008, 09:20 PM ArtechnikA
Dellorto:
main jet 36
Venturii 140
Ahhh - no.
Th... Aug 23 2008, 07:00 AM LetoAtreides Ok, sorry about the bogus numbers. I thought the ... Aug 23 2008, 10:39 AM LetoAtreides Ok, main jet is 140
pump jet is 35
I'll have t... Aug 23 2008, 10:48 AM rhodyguy what are the flow #s as indicated on your synchron... Aug 24 2008, 07:46 AM |
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