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#1 |
I'LL TRY TO FIX IT!
Join Date: Oct 2007
Location: Santa Maria, CA
Posts: 108
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So I fixed one thing and break another!
I installed a new HEI distributor last night along with plugs and wires to replace my old points distributor. (THANKS ED!) On the way home it was shifting really late, almost seemed like it wasn't going to shift at all. Did I bump something during the install? Does the new HEI have anythink to do with it? What should I look at? Engine runs nice now and idles at a lower RPM. This is on a 72 c10 with 350 motor and transmission. Last edited by MrClean; 11-19-2010 at 04:53 PM. |
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#2 |
Registered User
Join Date: Oct 2010
Location: Seattle WA
Posts: 21
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Re: Shifting later after installing HEI???
Sounds like maybe the vacuum line that goes to the trans came loose. It should be connected to intake vacuum.
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#3 |
I'LL TRY TO FIX IT!
Join Date: Oct 2007
Location: Santa Maria, CA
Posts: 108
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Re: Shifting later after installing HEI???
forgot to mention that this was my first over 60 mph drive in this truck, 21 miles to the base and 21 miles back home, if that matters...
NovaOne: i'll check the vacuum line when I get home. Thanks! |
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#4 |
Senior Member
Join Date: Nov 2003
Location: Brookings, SD
Posts: 10,497
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Re: Shifting later after installing HEI???
When I read the title my first thought was vacuum line. That would be the first place to look.
__________________
Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs. |
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#5 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,924
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Re: Shifting later after installing HEI???
I am with the others, the vacuum line was my first thought.
__________________
Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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#6 |
I'LL TRY TO FIX IT!
Join Date: Oct 2007
Location: Santa Maria, CA
Posts: 108
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Re: Shifting later after installing HEI???
Thanks guys you were right!
Does this mean my timing is off since this vacuum line was disconnected? |
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#7 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,924
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Re: Shifting later after installing HEI???
It would not hurt to recheck it. You did have a vacuum leake while you were timing it.
__________________
Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 11-20-2010 at 07:11 PM. |
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#8 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Shifting later after installing HEI???
The distributor should be disconnected from the vacuum while the timing light is on, but you have to be sure to plug the port where it was connected. Re-connect the transmission line, which will stop that leak, and re-check the timing.
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You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() Last edited by LONGHAIR; 11-20-2010 at 07:37 PM. |
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#10 |
Registered User
Join Date: Jun 2010
Location: San Diego Co.
Posts: 1,167
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Re: Shifting later after installing HEI???
MrClean, one question for you. did you have to modify that transmission vacuum line at all to get your HEI dizzy in? I will be doing the HEI upgrade in the near future on the same basic truck/engine, and I can tell that line will have to bent out some to allow the wider diameter dizzy to fit well. Just wonder'n if that was an issue for you?
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#11 |
I'LL TRY TO FIX IT!
Join Date: Oct 2007
Location: Santa Maria, CA
Posts: 108
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Re: Shifting later after installing HEI???
Slikside: I had to unplug the vacuum line then drop in the dizzy then plug it back in. Forgot that last part...
Had to reshape the line just a bit, and added a clamp on the hose to keep it from falling off. Posted via Mobile Device |
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#12 |
Registered User
Join Date: Jun 2010
Location: San Diego Co.
Posts: 1,167
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Re: Shifting later after installing HEI???
OK, good to know. Thanks MrClean. Glad you found that disconnected line. Sure is nice when you find the easy fix that makes all the difference.
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