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jmargush |
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#1
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Member ![]() ![]() Group: Members Posts: 463 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 ![]() |
I am having trouble getting my new 2056 with a 9590 cam to idle. When I start it is idles around 500rpm or lower and I can't speed it up with the by pass screw.
I am running L-jet injection I hear a hissing sound when the engine is idling but I cannot find a vacuum leak, plenum couplers are new and all other hoses are in good shape. I can't find the hissing with a mechanics stethoscope so I was going to try to find a leak with propane but it has been too cold to work on it lately. The idle does seem to get a little better after it has warmed up a bit I think, it has been several weeks since I have had it out. One question I had is does the new cam require any change to the mixture? if so how do I go about adjusting the mixture? Thanks in advance for any input |
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jmargush |
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#2
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Member ![]() ![]() Group: Members Posts: 463 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 ![]() |
ok so I finally had a chance to get back to working on the car.
I richened the L-jet by moving the static mixture adjustment 1 tooth richer and leaned out the dynamic mixture by 3 teeth. The idle is starting to come down but everything else is too rich so i tried 3 more teeth leaner on the dynamic. I believe this is inducing another problem by relieving spring tension on the barn door it is allowing the wiper to swing past the potentiometer and then the engine cuts out till it comes back onto the potentiometer. Also the accel. and WOT numbers are still too rich. So I seem to be stuck by not being able to get the idle mixture rich enough without making all the mixture too rich. The idle mixture screw on the meter does help a little but not enough to get it where ti needs to be. Is there something else I can do? Will changing the advance on the timing have an effect on mixture? particularly at WOT and accel.? |
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Lo-Fi Version | Time is now: 18th June 2024 - 02:43 PM |
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