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Subject | Project Update.... big problems..... help  |
| Posted by | |-K|=K | Posted on | 1/16/06 6:17 PM |
Ok- so I fired up the engine Saturday for the first time since Nov. 2002. Of course youall may know it's no-longer fuel injected etc.etc.
Problem 1- After adjusting the valves (instructions provided by Crower) and thinking I had stabbed the dist. correctly and setting it it up, here's what it does. It cranks over and starts QUICKLY but idles up to about 1300 RPM and ands runs for a little bit and then dies off- as the engine comes to a stop it blows fuel out of the Demon Carb. The regulator is backed off to it's minimum setting and it's still showing 8psi on the fuel- I cannot get it any lower. I don't have a decent timing light and not sure where the timing is- whether or not I've stabbed the Mallory dist. a tooth off or not.
Any thoughts on this?
Problem 2- I have the electric choke running off the ignition on 12V+ switch. The instructions say to run this off a switched 12V+ power wire- it doesn't specify if that wire should be hot at all times when the ignition is on or whether it should be on a toggle switch of some sort.
Problem 3- The driveshaft no longer fits. The 4L60E tailshaft yoke will not push in all the way into the 700R4 tranny which I "thought" was the same with the exception of the freaking electronic shifting. The yoke is shy about 1.25 to 1.5 from slipping in all the way- what gives? Is the yoke different on the '91-'93 trucks vs the '95 to '98?
I'm seriously getting disgruntled and bummed out getting this bucket running.
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Subject | Re: Project Update.... big problems..... help  |
| Posted by | lips | Posted on | 1/16/06 6:27 PM |
I'm not an exspert, but your first problem sounds like the dist maybe off a tooth. And I have NO clue as to your others - wish I was more help, you've helped me so many times!
See Ya ... Later, Lips
PS. Make it a Great Day! [url]www.photobucket.com/albums/a122/Cheve11e[url]
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Subject | Re: Project Update.... big problems..... help |
| Posted by | OneLowCHVY | Posted on | 1/16/06 6:39 PM |
Jody, cant help one bit with your issue, BUT, dont give up bro, I think alot of people want to see your truck come back to life, I wouldnt get discouraged. You only live once, finish the truck, make it badass, and enjoy it! If you dont finish it, you'll end up regretting getting rid of it as I do from time to time... Goodluck.
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Subject | Well.... I played alittle and read more today......  |
| Posted by | |-K|=K | Posted on | 1/17/06 01:30 AM |
.... and found out that the Demon carb has 2 vacuum ports for timing advance on the dist- among other vacuum uses. Well- one of the ports is direct manifold vacuum (manifold timing for vacuum advance) whereas the other is ported vacuum (throttle opening advance). Ok- I'm using a Mallory HEI- http://www.malloryperformance.com/ProductDetails.aspx?brandID=6&productID=3575036&txtSearch=8548201C and no longer have the 10 page instruction manual that came with it so I really don't know which port to use.
As for carb tuning- I don't know if it's the choke that's making the engine run so hard at roughly 1200 to 1400rpm idling or what. I let the thing run for a while (open headers haha) untill the thermostat opened and my temp guage never read over 179deg. I figure by then the elec choke would have cut off? No- yes, maybe so? The choke's timging can be timed too- I can twist it clockwise to decrease the amount of time it takes for the choke to pull off- however again this pulls me back to should the choke be wired in hot at all times the ignition is on, or on a separate toggle switch "I" can control (instructions very vague).
As for timing- what would a "tooth-off" on the dist/cam make any difference when you can twist the whole stalk/cap to make up the difference in timing????? I'm confused on that for sure.
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Subject | Re: Well.... I played alittle and read more today......  |
| Posted by | |-K|=K | Posted on | 1/17/06 2:34 PM |
No problems with the vacuum advance getting in the way- there's plenty room to spin the whole thing probably a good 30 to 40 degrees.
Maybe it sounds like the timing is off simply because the final radio of the valvetrain is 232 duration/.466 lift and I've never worked with something like this. The 3 guys that were out helping me (non mechanics) as well as myself figured it was either a timing problem, carb tuning problem, or a combination of both.....
Yeah it's got a fast idle cam but I haven't done much research regarding choke timing/fuel mixture. I'll probably work on it some again soon- it's been raining off and on.
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Subject | Re: Well.... I played alittle and read more today......  |
| Posted by | lips | Posted on | 1/21/06 01:11 AM |
As for timing- what would a "tooth-off" on the dist/cam make any difference when you can twist the whole stalk/cap to make up the difference in timing????? I'm confused on that for sure.
** Well, in theory that should work (as long as you can twist around all the way). I'm not sure about all this either, all I know is when I did this in my new small block and I was off just one tooth it wouldn't run below about 1700 rpm and when when-ever it died gas would come up/out of the carb. Again, just my .02
See Ya ... Later, Lips
PS. Make it a Great Day! [url]www.photobucket.com/albums/a122/Cheve11e[url]
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