7.3 IDI Turbo Knock -> Engine Pull and Rebuild

IDIBRONCO

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Of course I haven't installed my pillar mount yet, but I plan to run boost, vacuum, and EGT in mine. To me, those kind of go together.
 

genscripter

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I have 7 aftermarket gauges. 3 on the pillar, 3 center overhead, and 1 on the dash.

The vac gauge is located on the dash, since it was my latest install. I installed it on a whim a while back, and it wasn't part of my whole rewiring and interior renovation job. My original plan was just a temporary vac gauge, but now like @IDIBRONCO said, I wouldn't drive my IDI without it in the future.

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more info located here: http://www.nickpisca.com/diesel/fuel-system/new-overhead-gauge-pod/
 

MICHAEL MICHAUD

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Well it is with my most humble pleasure to inform you guys that the oil leaks have been sealed. The fuel block off plate and a small piece of the front plate were leaking. I tossed the paper gasket for the block off plate and used ultra gray. I globbed good amount of ultray gray over the small piece of the plate. Good to go.

The brakes work mostly conistently with the vacuum pump hooked right to the booster. Once in a while it stiffens up and the assist takes a second or two to kick in so either randomly the vac pump takes a poo or the booster is weak.

I only have 12 days till i leave. All i have to do now is make sure my trailer brakes are good and install a radio.
 

genscripter

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Maybe a solution to the weak vac system, is to put the vacuum canister in the mix. Just hooking the vac pump to the booster means there is no bank for the vacuum to build up. On long drives, your pump will build up a lot of vacuum because you don't use the brakes that much. But in stop and go traffic, your canister could help keep the vacuum at a decent amount.

But if you have a leaky booster, then it won't matter if the canister is in the cycle. But maybe it's good to have regardless.
 

MICHAEL MICHAUD

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They both hold vacuum pressure. Ill give them a more lengthy test tomorrow. Its hard to say when it could really be either one. If the parts were cheaper id just shotgun them both!

The brakes either work normally or just barely and when i hold it long enough the assist kicks in again.
 
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YJMike92

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I'm glad it's coming together for you.
I'll try not to make panic stop in front of you:)
You might want to set the trailer brakes on the aggressive side.
 

genscripter

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Yeah, I'm a little leary for you with these sketchy brakes and you planning to tow something. I'd say that's a bad idea to rush an upcoming trip without the fundamentals worked on out that truck. CoolantSystem + Engine + Tranny + Brakes. If any of those are worrisome, I would hold off on a long roadtrip or hauling massive loads.
 

MICHAEL MICHAUD

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Yeah im going to drive the truck all week to try to get a feel for whats going on exactly. I have only driven this truck about 4 times.

I dont have anywhere to live as of the 31st so I have to move somewhere. Its definitely a vacuum issue because when i found the disconnected vac line and recommected it it became mostly normal.

Im going to leave vac pressure on the booster and the pump for like 10 mins each tomorrow to see if either has a small leak. The thing is when the brakes work they work good. Just occasionally the assist takes a few seconds to kick in.

If i cant figure this out with 100% confidence Ill get a new booster and then if that doesnt fix it it has to be the vac pump. Ive read crumby reviews about replacing both parts because a handful of people say the fail out of the box.

Im leaning towards the booster because if the vacuum pump was bad I wouldnt ever have decent braking its would be consistently poor. Heck as I type this im womdering if its time to swap boosters. Any recommendations on brands?

On the other hand the fact that if i hold down the brakes on the couple of times its a hard pedal with no assist eventually after a few seconds the brake assist kicks in so it could be a lack of vacuum supply.... also I think I noticed the tends to happen more often at low or just after decreasing speed Ill look into it more do some experiments and get back to you guys.

For clarification I am hooked directly from vacuum pump to brake booster.
 
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MICHAEL MICHAUD

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Alright so i tested the system.

Vacuum pump puts out 25 in hg directly and at the entrance to the booster. Rev the engine or at idle vacuum output is the same. It holds vac pressure when turned off for 2.5 mins without changing.

Booster holds vacuum pressure but my tiny hand pump takes a while to get it to even 5 in hg. It holds it for about 2.5 mins with no change at all didnt see the need to wait any longer.

The brakes to the truck work great the first time I push the pedal. If i try to push it a second time rapidly the brakes are stiff and weak and if I hold the brakes the assist will slowly and eventually kick in. Its like it has to wait a few seconds to build up vacuum pressure in the booster. I dont remember this being an issue when I bought the truck.

So either the volume of pressure that my vac pump is putting out is too weak which is what im leaning towards. Or there is something funny with the booster.
 

Thewespaul

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Test the brake booster but put a little pressure on the brake pedal. It may be holding pressure fine with the pedal all the way out but be leaking massively once you move the pedal
 

YJMike92

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Test the brake booster but put a little pressure on the brake pedal. It may be holding pressure fine with the pedal all the way out but be leaking massively once you move the pedal
Hey Wes, Is there a check valve in the vacuum line going to the booster? I know these little asian cars I work on have a valve inline that can stick at times. Just a thought:dunno
 
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MICHAEL MICHAUD

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Yes there is a check valve right at the booster. Mine works with the old mouth pressure.

Today I drove the truck and I couldnt get the brake pedal stiff. I had to hit the pedal many times in a row before it became stiff. Nonetheless, I ordered a new Cardone vacuum pump from Summit for like 80 bucks. I couldnt pass it up.
 

YJMike92

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Thought about the check valve earlier today but forgot to check to see if there was one on my truck. Like I said sticking valves have been an issue.
 
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