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1993 toyota 3vze p/u vacuum lines on plenum - Cars & Trucks

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Vacuum Line on Back of Plenum Where does it Go tp??


Please to the Factory under hood emissions sticker, all vacuum line info is on that sticker. This sticker can be on the underside of the hood or on the fender arches or the radiator support. The location is specified in the owner's manual.

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On Toyota pickup 1989 3VZE 3.0 what should the fuel pressure pump have?


33 to37psi with engine idling and vacuum hose to reg. connected. 38 to 44psi Key on, Engine off.

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Need to see diagram for 88 jeep Cherokee Laredo straight 6 for vacuum line for transmission


in the USA? 4.0L engine.
TRANSMISSION VAC>.
So that be automatic.
and some have a vacuum modulator.
some dont.
if it does, its just a vacuum line from the modulator to the plenum.
the modulator uses hard vacuum to sense engine load, to delay shifting/

some EPA hood stickers fail to show this hose.
because its a trans hose and not related to smog.
only this is covered in the FSM.
surely you can find the empty nipple in the plenum
but is this and engine swap, and missing this?

I owned 3 1988 2 JX and 1 Comanche.

id find a vaccum line under full vacuum under idle. 20inches is typcal. (cant find real nipple?)
then add TEE fitting to this line and to trans.
end story.

there are 2 kinds of vacuum./
vsv solenoid switched, (like that on EGR)
direct plenum vacuum (bingo!)
and ported vacuum, weak or no vacuum at all at idle.

easy huh?, just use the hard vacuum line,, or make one.

May 06, 2015 | Jeep Cars & Trucks

1 Answer

1990 3vze 3.0 motor dies at idle


Have you done a tune up recently? Maybe the vacuum lines are routed wrong. Need some more information

Feb 13, 2013 | 1990 Toyota Pickup

1 Answer

Have trouble code 45 on a 1993 s10 blazer 4.3l. Have replaced oxygen sensor, did not help


1994 Chevrolet S10 Blazer 4.3L, Vin W Customer Concern: DTC 45 The spark plugs are black on both banks. Right bank plugs are damp. Removed the tuning valve and looked inside the plenum. Can see a washed/clean area on the right side. Fuel pressure is good, it holds when the pump stops. Tests/Procedures: 1. Remove the upper intake plenum cover and inspect for a fuel leak at the fuel pressure regulator.

2. Inspect the fuel pressure regulator and return lines and fittings at the left side of the plenum.

3 Replace the Central Multipoint Fuel Injection (CMFI) unit. Potential Causes: Leaking Fuel Line - One or more may have a problem.
Leaking Fuel Pressure Regulator
Tech Tips: The fuel pressure regulator may only leak at a cold or hot engine, only with vacuum applied, or only without vacuum applied. The leaking at the fuel lines and fittings have as often been the result of repairs as the initial cause of the problem. Handle the lines and fittings carefully. The fuel pressure regulator is a integral part of the Central Multi-port Fuel Injection (CMFI) unit. Any failure requires entire unit replacement.

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Changing the spark plugs on a 2000 forerunner


the upper intake plenum...you will have to remove the plenum to access the spark plugs...usually you are able to unbolt the plenum only and disconnect the front connectors and/or vacuum lines. and tilt the plenum up and out of the way to access the plugs... take care when doing this you can damage the engine if not careful. make sure you get a new intake plenum gasket...as well as the valve cover gaskets...the rubber rings that seal the spark plug tubes from oil tend to leak causing a misfire. you already have to pull the plenum might as well do the valve cover gasket while you are so far in it.

Aug 22, 2009 | 2000 Toyota 4Runner

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