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#51 |
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Location: Illinois
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Re: Edelbrock Carb Help
Man, I hate to hear you are having such a hard time. Getting everything timed right can be a real pain in the arse sometimes.
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Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie |
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#52 | |
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Re: Edelbrock Carb Help
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#53 |
Senior Member
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Location: Illinois
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Re: Edelbrock Carb Help
Good attitude to have! Hands on experience is the best.
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Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie |
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#54 |
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Join Date: Aug 2012
Location: Houston, Texas
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Re: Edelbrock Carb Help
Yeah and don't get me wrong this has been disheartening but I know when it's running strong and better than ever it'll make all that annoying cussin, frustration, and drinking fully worth it.
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#55 |
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Join Date: Jul 2012
Location: Des Moines IA
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Re: Edelbrock Carb Help
I think you're chasing your tail by throwing parts at it. You set the timing and verified TDC physically (and I assume the balancer timing mark lined up when you did that?!?!), that would be the end of that road for me. A new balancer isn't going to solve anything if the mark lines up with a verified TDC and a verified #1 on the dizzy. I'm still stuck on the poor start up issue and kicking off of high idle too soon, to me, points to a simple choke setup problem, especially since you said it runs well with good power the rest of the time.
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#56 | |
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Location: Houston, Texas
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Re: Edelbrock Carb Help
Quote:
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#57 |
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Join Date: Nov 2013
Location: Los Angeles, California
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Re: Edelbrock Carb Help
i have a similar issue. it runs like a champ dont get me wrong, just that every here and there the idle seems to go low, and my oil pressure would drop. i will accelerate and it will slug a bit. i checked everything. everything was good till i finally came to conclude it was the carb. i clean it a bit not to much and felt a difference, but it will need its rebuild
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#58 |
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Join Date: Aug 2012
Location: Houston, Texas
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Re: Edelbrock Carb Help
I'm not saying it's not possible but my carb is brand new hardly any run time on it or anything on it.
I'm lead to believe it's my balancer because the PO put his own marks on the balancer for what reason I have no idea the trucks motor was retarded so much that it ran the way it did. So I partially blame them on there timing and them improvising it so I'm thinking it's the balancer in which I have replaced but not yet installed.
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#59 |
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Join Date: Nov 2011
Location: yucca valley,ca
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Re: Edelbrock Carb Help
So with everyone chasing their tail and keep going round and round no one seems to remember there is multiple diffrent balancers and timing pointer depending on the year of the engine later years should have had the timing mark straight behind the water pump earlier had the pointer at the left side @ a 45 degree angle so the po probably put a dont get you home chrome timing chain cover with the aftermarket timing tab and then re marked the balancer either change the balancer and timing tab to match which would have been easier when the chain was done you could have used those timing marks to be 100% you were on or do what everyother got rodder or real mechanic would do and set the timing until it runs good with no starting issues or detonation and e done with it
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#60 | |
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Re: Edelbrock Carb Help
Quote:
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#61 |
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Re: Edelbrock Carb Help
Okay, so I got the truck back together and running so I took 3 videos
1st video is at 8 degrees advance, tell me I know it might be hard but do y'all hear anything that would make you think it's not running how it should and since I'm not driving I'm just doing power braking. 2nd video is at 0 degrees timing, which I can only tell 2 differences that it idles higher and that it idles smoother. 3rd video is just showing that I'm giving it good throttle, and in this video it's at 8 degrees advanced.
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#62 | |
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Join Date: Jul 2012
Location: Des Moines IA
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Re: Edelbrock Carb Help
Quote:
STOP THE PRESSES!!! Take a picture of your distributor at 0* then again at 8* advanced. I would SWEAR that in the "advanced" video you're distributor is retarded and not advanced from the 0* shot.
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#63 | |
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Re: Edelbrock Carb Help
Quote:
Okay, so your saying that in my video where I'm supposedly advance it's possibly actually being retarded?
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#64 | |
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Re: Edelbrock Carb Help
Quote:
From the video (it's quick and I can't tell for sure) but yes, it looks like you're retarding it instead of advancing it. Advanced is counter-clockwise and it looks like you went clockwise in reference to the 0* video. I could be wrong, but from the quick glimpse it looks like it.
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#65 | |
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Re: Edelbrock Carb Help
Quote:
That's exactly what it's doing when we would advance it the idle would drop, but when we would retard it, it would rise. So what would be my course of action? Would I take out the dizzy and try to figure out how many tooths it's off and just play with it that way or what?
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#66 |
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Location: Des Moines IA
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Re: Edelbrock Carb Help
So, were you advancing or retarding??? Set it at 8* advanced and adjust the idle settings on the carb.
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#67 |
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Location: Des Moines IA
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Re: Edelbrock Carb Help
And you understand how 12/12 timing marks could be harder to know if you're one tooth off... at 6/12 the tooth tips should be pointing towards each other directly.
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#68 | ||
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Re: Edelbrock Carb Help
Quote:
Quote:
Yes I understand what your saying but how would I get it to the 6/12?
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#69 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,630
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Re: Edelbrock Carb Help
Put #6 on tdc and #1 will be at 6/12.
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#70 |
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Join Date: Jul 2009
Location: cleburne texas
Posts: 174
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Re: Edelbrock Carb Help
Wow........when you advance the timing you pull the dist by the vac canister towards you the front of truck youre idle speed will pick up and when you retard it you push the canister towards the firewall youyre idle will decrease....................set idle at approx 2000 rpm and turn the dist to the point you get the smoothest idle.tighten it down lower youre idle now done
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#71 | |
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Re: Edelbrock Carb Help
Quote:
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#72 |
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Location: Des Moines IA
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Re: Edelbrock Carb Help
Correct, since the cam turns at half speed the marks will line up at both locations. It's just easier to see at 6/12. If you have the marks at 6/12, rotate the crank one full 360 degree turn, the marks will now be at 12/12 and ready to drop the dizzy in at #1. One more 360 degree turn they will be back at 6/12 (you can drop the dizzy in at #6 here). If you truly got them in the right place on your 12/12 setup, then they will also line up in the 6/12 position perfectly with the dots's teeth pointing 100% directly at each other.
Cylinder #6 and #1 are at TDC at the same time, just that #1 is ending the exhaust stroke and starting the intake stroke, and #6 is finishing the compression stroke and starting the power stroke.
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#73 |
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Join Date: Aug 2012
Location: Houston, Texas
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Re: Edelbrock Carb Help
Okay thanks guys! So I guess I get to pull everything off again
![]() What do I do if it is indeed a tooth off?
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#74 |
Registered User
Join Date: Jul 2012
Location: Des Moines IA
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Re: Edelbrock Carb Help
Loosen all of the rocker arms, pull the cam gear off, and reset. I highly recommend the 6/12 tooth to tooth method, then rotate to the 12/12 position and recheck with a straight edge. Then you can drop the dizzy at #1.
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#75 |
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Location: Houston, Texas
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Re: Edelbrock Carb Help
Okay thanks but it might also would help if I put it at 8* advance and also get that set straight before I pull it off again?
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Korwin 77 C10 Silverado Sharkbite LWB Build 67 Chevy C10 Frame Off 06 Dodge Magnum 2.7v6 aka swag wag! 2010 Honda Accord 2.4I4 DD aka Liquid Metal |
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