The Wanderers build

[superbuickguy]

In today's fun. I had to run one more wire to get the plow to work. I did. It didn't. Thankfully there are more than a couple people who know about snowplows up here....
a normal solenoid has two large lugs and two small lugs. This allows you to either use positive dc voltage to trigger the solenoid or negative. The solenoid with the truck only had the one terminal.
Guy at the plow shop said you have to make sure the solenoid is grounded to work.
The control uses negative voltage to start the pump. Yet the one wire solenoid only triggers with positive...
then it dawned on me, the solenoid was bolted to the positive terminal on the battery. I must be too far removed from my redneck engineering training to not instantly realize what was going on.
The fix is this

I also got tips on how to bleed the system so it wasn't complete stupidity - as it's not simple to bleed the western plow

 

[superbuickguy]

spent the last couple days on investigating this.
To recap - not developing boost/limited boost.
There are a quite a few things that can cause this but let's stay with injection, turbo sizing, and timing for now.
Thus this list is:
- bad pump
- bad turbo
- incorrect pump
- incorrect turbo
- timing.

Thus, not enough fuel creates colder running motor and won't develop full boost. Timing does much the same. Turbo sizing - if I didn't already have the same turbo on a DB4 pump (1994 suburban), I would have bought a new turbo. The 94 installation (which is the same exhaust manifolds as is on my Blazer) - will boost to 20 psi if I wanted to get a good look at my head gaskets, but is limited there to 11 psi.

Timing should be straightforward except that GM timed each motor on the assembly line to the pump... thus, it's possible the timing could be wildly off (and reserving this check for later as I don't want to buy the tool). Fact is timing does affect the boost, but I've owned a lot of 6.2/6.5 turbos (GM and every aftermarket) and found that it's not that critical - so again, may circle back here. Oh, and I have checked the actual timing order as I couldn't tell you what the lines came off and may have installed a line incorrectly.....

So let's talk pumps. DB2 pumps come in a dizzying variety and were produced until quite recently.... they range from 6.2 pumps to 6.5 pumps to 6.5 turbo pumps... now add marine applications and it would be easier to get a wrong (read, small) pump. I just checked numbers, is a DB2 xxxx-4911. A 92-93 6.5 pickup 200hp pump (this info is hot off the press as I'm still searching). That is, 3/4 ton/1 ton truck....

the last 'easy' check is to find a pressure gauge (electronic) to make sure I'm getting at least 5-7 psi fuel pressure on the back side of the fuel filters - thought here is that I used a mini-duramax filter set and they limit the flow because they were designed for a 40 psi system (shouldn't matter, but I'm beyond the easy fixes).

In other news, I learned a lot about the cold weather starting system on this pump - and did make a mistake that I need to correct.... I didn't realize the cold weather start package added fuel in the start cycle - it's not connected at the moment and I do need to get that connected because it seems GM may let that affect the warm weather running too...

 

[superbuickguy]

upcoming with the plow - the rams are both messed up, one is frozen, the other is bent from trying to move the other

but on to other fun stuff

dang, pulled a muscle tonight spreading salt so wife doesn't toboggan down our hill tomorrow... before that call to duty...
this arrived awhile ago but starting to envision how to mount it to the tailgate, it's rated to 300 lbs

one of the problems - the original cable is sticking... and the new one is different from the old

needed to remove to fix and make it so it can work (fast idle solenoid)

see one of its problems?

dang, ouch....

 

[superbuickguy]

problem 1
the cruise control arm lost its keeper key

clipped

problem 2
there is no way to keep the wire on the high idle solenoid with the dual thermostat crossover

solder wire to tab

problem 3
cable sticks

problem 4
cable hole too small

filed

 

[superbuickguy]

Commentary about the stairs... they seem to have natural heights but it's hard to adjust so that it's solid feeling

With that said, my utility Labrador Luigi tested it and approved it

thus, it is lab tested and approved
so the cable... not enough travel, which got me thinking that perhaps my turbo issues are cable looseness related
so sleaved the old one - we will see tomorrow

big hole

shim (aka rivnut)

lugnut