Carb Issues ? (opinions needed)
03-21-2010, 11:03 PM
#1
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Carb Issues ? (opinions needed)
So on the car, ever since we finished the build. It runs good, but in the lower rpms there is a spot where it kind of studders, It's a very small range of like 200 rpms and it's down low but say you're cruising at a low rpm, and get on it, the motor starts to rev, hits that spot, kind of stumbles then the power comes on strong as hell.
Also, lets say you get it on it pretty good, shift through the gears, then clutch. The engine will sometimes fall very low, like 400 or less rpms, almost stall but just barley come back up to idle real fast. But sometimes it wont catch itself and it will stall.
We're running a Holley 670 street avenger, it has backfired a couple times. and i've heard it shoot fuel out the carb when it's almost stalled, usually I can keep it from stalling if I flutter the pedal a bit when it gets down real low in the rpms. Seems like it's running rich and flooding out sometimes.
Here's a vid from a few weeks back, it gets cut off a bit at the end, but you can see it studders and stalls at the end of the burnout. does the same at times like I said when you get on it hard and try to let off suddenly. Doing that seems to make it want to stall.
http://s184.photobucket.com/albums/x...rnoutStall.flv
Looking for opinions here. Carb has been tinkered with a few times by a few people. We have one of those triangle shaped edelbrock pro flo filters on it right now, with the foam filter. Which has been burnt by the backfire before. I'm wondering if a piece could be in the carb. And the motor was warmed up before that burnout.
Also, lets say you get it on it pretty good, shift through the gears, then clutch. The engine will sometimes fall very low, like 400 or less rpms, almost stall but just barley come back up to idle real fast. But sometimes it wont catch itself and it will stall.
We're running a Holley 670 street avenger, it has backfired a couple times. and i've heard it shoot fuel out the carb when it's almost stalled, usually I can keep it from stalling if I flutter the pedal a bit when it gets down real low in the rpms. Seems like it's running rich and flooding out sometimes.
Here's a vid from a few weeks back, it gets cut off a bit at the end, but you can see it studders and stalls at the end of the burnout. does the same at times like I said when you get on it hard and try to let off suddenly. Doing that seems to make it want to stall.
http://s184.photobucket.com/albums/x...rnoutStall.flv
Looking for opinions here. Carb has been tinkered with a few times by a few people. We have one of those triangle shaped edelbrock pro flo filters on it right now, with the foam filter. Which has been burnt by the backfire before. I'm wondering if a piece could be in the carb. And the motor was warmed up before that burnout.
03-21-2010, 11:07 PM
#2
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It didn't post all that I had typed.... running an edelbrock pro flo air filter, the triangle mesh one with the foam filter element junk. It's been burn by backfire before. Kind of wondering if some bits of that could have found a way into the carb. But it's been like this since we finished it. I'd like to get the stumble issue resolved then have it dynoed.
03-22-2010, 08:30 AM
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Thoughts ?
03-22-2010, 07:30 PM
#9