ZachCRF450

Last year I did a 3.4 swap on my 1991 pickup. Last week when I was at Les Schwab getting my tires rotated and balanced, the mechanic pointed out that my front differential was locked and shouldn't be. Turns out that the for last 10,000 miles I have been driving around with it locked up. After some brief investigating, I have determined that the problem is with the function of the VSV's. I have been able to get the diff. in and out of four wheel drive but only by switching the vaccum lines around.
The way I found this out was because the Red VSV is getting a constant vaccum no matter what I do, and the blue never creates a vaccum. I really would rather not put in manual hubs. What I need to know is, Since Offroad Solutions is now out of buisness, is this an wiring problem with their harness? Or is this prablem being created elsewhere?

RobD

Read this article and see if there's any help:


http://www.off-road.com/trucks4x4/ar....jsp?id=399612

Why not manual hubs? I did mine after my 3.4 swap...I couldn't be bothered troubleshooting my VSVs, either.

ZachCRF450

Allready been There. There should be a Reasonable explination. maybe the Relay?Thnx

ZachCRF450

Oh the confusion has set in.

RobD

I think Mike from ORS is still answering questions about the swap harnesses he made, even though ORS has more or less shut down.

I could be wrong.

ZachCRF450

Do you know the Number to get a hold of him?? The old number is disconnected. What happened anyhow?

breknraj

I retained my ADD after the 3.4 swap, and I added manual hubs. Best of both worlds, as far as I'm concerned.

As to your issues with your ADD, I would start by making sure that ALL of your vacuum hoses are all in good shape. A leak anywhere in the system can affect the ADD. Next, check the vacuum cannister under the passenger fender to be sure it hasn't rusted through.

If, after checking those things, you are still having issues, it might be that age has caught up with the VSV valves, themselves, and they are not opening or closing when they should. You can probably find decent replacements at a salvage yard, if need be. They are probably also available from the dealer, as well - if you don't mind the $, then new would be the way to go on those little jewels.

I have not had any issues with my ORS harness with my ADD, or anything else, for that matter.

Good luck, and let us know what you find!

ZachCRF450

Finally Figured it out. For some reason the relay was not getting the signal to close the relay switch circuit. The wiring harness that ORS made me must not have been made correctly. There is a dark green wire that goes to the ADD relay that is supposed to close the circut (to engage the 4wd VSV) when the transfer switch is engaged. The wire was aparrently not connected after the swap. I solved the problem by splicing a wire into the green wire and running it to the ADD wires of the ORS harness. This completed the circuit and the 4wd is now working great. Thnx Guys!!

waskillywabbit

iTrader: (-1)

Good tech and good follow up with the fix.