KY_BOB

So it's the gereral concesus that if an 82 fuel pump is down, an '85 ACDelco is the best replacement? From my research, it's not a direct replacement. I have read something about a wiring harness adapter? Does the part number listed above include the needed adapter. I can solder but plug and play is nice. If I need to move this to another thread, I'll be happy to.

scorpion18z

I too am curious about this. I would also like to know why the '85 is the better pump and what warrants a change-out?

jdp6000

Even an 82 replacement pump comes with the new connector. Its the same connector that's on the 85 pump. So there is a bit of wiring involved on both.

Difference?

82 pump pushes volume of 9-13 psi. The engine likes around 12. The pressure is set by the regulator spring in the driver side TBI. Under load (or as the pump weakens) the volume starts to drop, fuel supply is not enough to keep up with the RPM's. Once it drops below 9 psi the motor starts to hesitate and loss power at higher RPM.

The 85 pump pushes volume at 40 psi. Well above the 12 psi the spring is set at. The spring will step down the volume to 12 easily. And because the 85 pump is so far above the 12 your TBI's will always get 12. A weakening 85 pump has a long way to go before it can not deliver enough. The other advantage is you can pop the cap on the regulator spring and dial it up a bit. Some have gone as high as 14-15 psi.

KY_BOB

Thank you for the info. It seems like a no brainer.

74 LS4-454

No need to move any questions you may have concerning the 82. If the info you are looking for is not in the "sticky" there is always someone who will answer here as Jim did....

you & all 82 owners need to know this info...

Jim, thanks, great info as usual, will incorporate into the "sticky"

Thanking you again and everyone else for info that contributes to the "sticky"

C4B4the04

If you'd like to add this to your list:
Speaker rebuild for an 82 (or any year for that matter)

http://forums.corvetteforum.com/c3-t...with-pics.html

Cassidy

74 LS4-454

it is added under the MISCELLANEOUS SECTION #5
thanks for the contribution, that's what makes the "sticky" so useful

74 LS4-454

hey when this beautiful white 82 pic sneak in???? I know I asked for a pic, and just found it tonight. that is one nice looking 82

74 LS4-454

ok, some minor tweaks added tonight, even found a misspelled word
still have more to add and some new headings also, in the future.
don't forget, need your contributions as well to build on the info that we already have. any interesting web sites or other 82 info that you come across, just let me know and will be glad to add.
and if you feel like you want to add a non 82 item, but is still C3 related, that will go under the MISCELLANEOUS SECTION
And as always, thanks for the support and contributions from all, it makes for a great "sticky"

74 LS4-454

update......may have to change part #'s on the u-joints, as I am reading that the 82 did in fact use 2 different sizes, 1 size for the 1/2 shafts, and another size for the driveshaft. checking out the GM parts book and other member's experiemces along with the part #'s they used. will update that part soon as I get more info.....

RJohn

Hi I posted a thread before i seen this sticky my newly purchased 82 with 70k dumps fuel at cold start and chokes car out havent been able to let run long enough to warm up any ideas or advice is greatly appreciated Thanks Ryan

Arkyvette

Mine had that same issue. Coolant temp sensor was the primary cause. The one at the front of the intake. Once I fixed that I had to replace the spark plugs as they were fouled with fuel beyond usage. Could be a pressure regulator problem if that doesn't help.

RJohn

Thank you much Arkyvette

74 LS4-454

Based on what other members have found out and myself included. It appears that the 82 does use 2 different size u-joints.
I will know more tomorrow when I attempt to remove the driveshaft.
The correct joints for the 82 half shafts are a cap size of 1 3/16" cap size and 3 5/8" in length from cap-to-cap, top-to-bottom, side-to-side.
I ended getting the joints from Advance Auto, Moog part #231
They are solid non-greasable joints and they are made in the USA
The "sticky" will be updated.

jdp6000

It will be interesting to see what you find. I know for a fact mine were different. My friend own a vette parts place. We were unable to match the shaft and spindle when I was looking for one. The reason was he never chopped an 82. He had lots from 80 and 81 Vettes but they were not close in size. As a matter of fact no other year vette matched.Ours are bigger and shaped different.

74 LS4-454

Jim, based on your info, I am going to try to measure the caps and length on the driveshaft joints if possible before removal. I already called out from work tomorrow as the 82 is apart, got the halfshafts out, but the joints are giving me a hard time. May have to go to a machine shop and have them do it, as I need to get it back together by tomorrow night.
Want to make sure I can get the correct joints for the driveshaft.
I know that the Spicers that I thought fit our 82s' are smaller, but don't know if they are the right ones for the driveshaft..........Tom

jdp6000

I haven't done the drive shaft. It was done by a local shop when I first got the car. So I don't remember which U joint was put in there. Let us know. It would be interesting to see if they used different sizes in different places.

74 LS4-454

Halfshafts are done and installed, along with other rear adjustments....
Hope to get to the driveshaft this weekend.....

RJohn

Hi again new temp sensor and plugs and wires car now runs better but is still a bit rough almost like a crossed wire new plugs look ok a couple are oil fouled though any ideas here?

Arkyvette

Base timing set ok? Any codes from ecm? Tps voltage set correctly? Just some thoughts out loud.