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I have an 88 f150 302. I am most likely going to do the intake this weekend now that I have the time. I want to replace EVERY vacuum line on it. What size hose and how many feet should I buy to do so? Is every hose the same size? I don’t want to take them all off to find out all that since I want the intake back on ASAP so I don’t drop anything in it. I’ll put towels in it but still it’ll stress me out the longer it’s off.
When I clean the upper intake, if the lowers bad how do I clean it since all the carbon would fall into the engine?
Is there a way to check the injectors to without removing them while it’s off? I don’t have any of those special tools to check waveforms or a balance test with them.
Engine will just eat any small carbon it that goes down it. I prefer to use painter tape on the lower's exposed holes, rags work well too. Used many times.
Those injectors are going to flow all over the place and they are 36 years old. They can and do plug with age slightly resulting in poor flow and atomization. Easy to grab four pintle 19lb/hr are from the various early Expeditions and 10gen F150s, you could nab a used set. Mail out to be refurbished. Install when you pull the upper. I have used two local injector shops with same day turn around, which may be an option for you too. I have no problem running single pintle units in a few of my old Euro cars.
Vacuum line size, I am not sure as there are many. Long ago I did swap the PCV and booster lines on the 302 as apparently limits oil intake into No 4 and No 8. 3/8" hose sounds right for that. MAP looks around 1/4", mine is MAF now so that sensor is open.
These two types of reducers split when I used them.
Some of the vacuum tree nipples are 1/4", so you need to reduce down to your vacuum line size.
This is what I ended up doing, to reduce down.
Red is 1/4" to the vacuum tree.
White is an elbow reducer, with a barbed end inside the 1/4" hose.
Blue is 5/32" vacuum hose.
The white plastic fitting is a barbed 1/8" fitting.
While the upper intake is off, it's also a good time to check out your air injection crossover tube and diverter valve, which are in the first picture in the PCV Reroute thread I posted.
If you want to keep your catalytic converter/air injection system, or want to remove the crossover tube, it's easier to access with the upper intake off. https://www.ford-trucks.com/forums/1...t-this-is.html
These two types of reducers split when I used them.
Some of the vacuum tree nipples are 1/4", so you need to reduce down to your vacuum line size.
This is what I ended up doing, to reduce down.
Red is 1/4" to the vacuum tree.
White is an elbow reducer, with a barbed end inside the 1/4" hose.
Blue is 5/32" vacuum hose.
The white plastic fitting is a barbed 1/8" fitting.
Should I get 10ft of 1/4? I think my brake boosters bigger than the others not sure though. And if I swap the PCV one with the brake booster one, will that work to fix the cylinder #8 TSB? I still haven’t got to that a year later.
I will have to inspect the thermactor system I have a code 44.
Should I get 10ft of 1/4? I think my brake boosters bigger than the others not sure though. And if I swap the PCV one with the brake booster one, will that work to fix the cylinder #8 TSB? I still haven’t got to that a year later.
I will have to inspect the thermactor system I have a code 44.
You don't need 10' of 1/4", you just need a way to reduce down from the 1/4" nipples to the 5/32" vacuum line.
Yes, the brake booster hose is bigger. I don't know the size of the top of my head. Take it with you to the parts store.
The existing PCV hose typically won't reach the vacuum tree, but the existing brake booster line will reach where your PCV is connected at the rear of the upper intake.
It's also possible that the PCV line has already been relocated to the underside roughly center of the upper intake. If so, just leave it in that location.
I may have time to look into the injector thing, since my wheel lock replacement came I have to redo those tomorrow instead.
And the 10th gen f-150/expedition of that era injectors are plug in play?
The LKQ says for the 5.4 Triton injectors that a set of mustang ones will work as well? One of the cars at my auto shop doesn’t run it’s a mustang with the v8 early 2000s I’ll see if they’re sending it to the junkyard or not I know they’re sending some of their cars there. If they are I’ll see if I can take the injectors
They also have a 97 expedition with the 5.4 so I can ask if that one’s going to the junkyard
I'm in the process of fixing some vacuum lines on my 96 F350 460. I bought 5/32 hose and some oil pressure gauge nylon tubing. I'm going to use the nylon tubing to run a new line from the hvac vacuum motor that sits in the right hand corner of the engine bay that seems to be broken on every truck I looked at, including mine into the cabin to replace that brittle white line.
I just had to buy some 1/4 inch hose today to replace the line from the charcoal canister up to whatever that small round module is on the right side of the engine area.
