 Backfire on decel and cruising, No exhaust leak... what to check next? |
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| Lawrence |
 Aug 13 2003, 07:08 AM
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Senior Member  Group: Benefactors Posts: 1,661 Joined: 5-February 03 Member No.: 244 Region Association: None   |
I crawled under my car last night to see why I might have backfire. I figured maybe some piece of exhaust hardware had loosened itself up. Nope, everything looks good.
I'm thinking the issue is carbs, since that's the last thing I played with. What should I check next? TIA, Rusty (IMG:style_emoticons/default/smoke.gif) |
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| si2t3m |
Aug 13 2003, 10:55 AM
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914 addict Group: Members Posts: 346 Joined: 9-January 03 From: Qc, Canada Member No.: 119 |
Well, if you don't have that handy float lever tool, you could build one. We did this when checking what was going on with the carbs on a friends 914-6 conversion.
After all, it's a liquide level. Basically we took one of the drain plugs out, ran to the hardware store, to find a bolt that had the same thread and some clear tubing that could fit tight over the bolt head. We drilled out the center of the bolt, put the clear tubing tight over the head and put the bolt into the carb. we made a little fixture to hold the clear tubing pointing up next to the carb with some metal wire. We put a line on the tubing to align it to the carb flang and 2 other line where the one on the float tools are located (got the specs somewhere). It worked pretty good. The fun part of it was that you only need to bend back the tube to drain the chamber in a cup instead of spilling gas all over while unscrewing the float lever tool. Marc-André |
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Posts in this topic
Lawrence914-6 Backfire on decel and cruising Aug 13 2003, 07:08 AM
rhodyguy where on the rpm range does it happen? cruise, wha... Aug 13 2003, 07:17 AM Lawrence914-6 Morning, Kevin,
When crusing... but most often wh... Aug 13 2003, 07:22 AM rhodyguy good morning, i mean where does it happen @ cruise... Aug 13 2003, 07:29 AM rhodyguy i also regret not putting ina o2 bung before i had... Aug 13 2003, 07:38 AM ! Carbs are out of sync..... Aug 13 2003, 07:46 AM rhodyguy here is where the speculation starts. at 3000 to 3... Aug 13 2003, 08:15 AM si2t3m Hi Lawrence,
While this might not be of any help... Aug 13 2003, 10:19 AM si2t3m just to rule some other stuff out. Check for leaks... Aug 13 2003, 10:25 AM Lawrence914-6 The carb floats are roughed in, but at least they ... Aug 13 2003, 10:40 AM tryan i agree with mikey.
sync the carb linkage at cru... Aug 13 2003, 02:22 PM mr914 I'd also check the mechanical/vac advance of t... Aug 21 2003, 10:32 AM
Lawrence914-6 I haven't had a lot of time to play with it...... Aug 21 2003, 10:35 AM |
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