when deleting this unit, is there anything that needs to be blocked? i am leaving the acv in place. i am running an rb exhaust, so no split air pipe. the outlet on the lim can be left open. all the vac lines are still hooked up to the acv. the acv air inlet can be left open to atmosphere, yes?
sorry, i'm trying to figure out an idle issue and i want to be sure that the delete isn't part of the cause. though i don't think it can possibly be. but want to make sure
as always, much appreciated

 

also, i'm curious to know why others have figured that the removal could cause waterpump slippage. when it's clear that the waterpump pulley turns the air pump and not the other way around

 

The problem is that you do not understand torque...

 

The belt goes around the water pump, crank pulley, and air pump. The water AND air pump get driven by the crank, so 2 belts turn the wp. Remove it and you'll be prone to slippage. Not saying you will in fact experience it. Most really won't.

 

The air pump belt only goes around the air pump and water pump pulleys. Not the e shaft pulley. So how dies it help when it's not physically connected to the e shaft?
A simple power flow would show that power is transferred from the e shaft to the water pump which then drives the air pump

 

Enlighten me, please

 

Alright. The belt deflection should be set per specs, so let us begin there. Then take into account that the front end accessory drive was planned to always retain the air pump, this 'extra' belt is routed around the water pump. The alternator belt too is routed around the water pump. Both these ancillaries are driven by the main pulley. Remove one belt, and some of that 'designed in' belt traction is lessened. Therefore, rapidly increasing engine speed (at that main pulley) can 'over drive' the belt past its limit of adhesion on (likely) the main pulley.. causing slippage.

Additionally, if the one belt breaks...nothing is driving the water pump.

Get a dual sheathed alternator pulley if you want to ditch your air pump.

 

I think I seen a picture in the FSM that had the belt routing for only the alt and wp.

 

Nope. Page 1-7 of the FSM shows the air pump belt goes around the main, water pump, and main pulleys.

I really think there's a lot of unwarranted hostility, and it's all centered around this simple explanation. The water pump has 2 belts, both driven by the eccentric shaft.

 

oooohhh k. i see what's going on here. the e shaft is not driving my air pump. my air pump belt goes only around the waterpump and air pump. not the e shaft. this is where the misunderstanding has come from. of course, if mine went around the e shaft pulley, i never would have even questioned. the po must have installed this incorrect one.
and no hostility here, bud. thank you for clearing this up for me. i think i'll just reinstall the air pump and get the correct belt. i really didn't care to delete it. just figured that since i have no catalyst, no smog to deal with, and wanted to make working in the bay as easy as possible

 

No, the e-shaft DOES drive the air pump AND water pump.

They all go around the eccentric shaft pulley. The alt. belt also loops the water pump. The air pump also loops the water pump. The AC belt loops the AC compressor and its idler. The power steering pump belt also loops the PS pump and its idler.

I mis-typed the last post. It was supposed to read:
"the air pump belt goes around the main, water pump, and air pump pulleys"

 

If i remember correctly the airpump goes to the Idle control, you'll have to remove that and cap it. there might be some info here Emissions Removal

 

no, i got that. on mine, the air pump belt only rounded the air and water pump. and not the e shaft, like it should

 

Ohhh... now I see.