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Where are all the vacuum lines?

nik12937

nik12937

New member
Does anyone have diagrams, pictures, or just advice on where all the vacuum lines are/go on an L26? I think I have a vacuum leak, but no matter how much searching I do can only seem to find diagrams and threads online for L32 and L67 vacuum routing.

I want to spray them all down with carb cleaner but I don't honestly know where to start...
 


There's only one that goes to the brake booster as far as I know. Have you taken the intake off before? You probably forgot to lube the injector o-rings and tore one. That happened to me. Carb cleaner works. Use the straw. Let the engine run while you spray and if you hear the idle change then you found the leak.

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I replaced all the injector o-rings last month, just lubed with some motor oil and I double checked that they seated right. So the only vacuum line is the brake booster? I've removed it before so it could be leaking, I'll try carb cleaner around all the fittings and such.

If the crankcase breather line has a leak, could that cause any problems? It goes from the top of the UIM to the intake, crossing over the throttle body. I only ask because I know it's PCV system related.

The reason I ask any of this is because my car very occasionally drops about 100 RPM while idling and then goes back, so I'm assuming a vacuum leak. I already did the normal checks like cleaning the throttle body, EGR valve, plugs and wires, PCV, etc.
 
i cant seem to find a diagram either. but any cracks in any lines are not good. pvc related will cause a vac leak.

may want to hit a junk yard and get a new line for that.

try spraying the crack in that broken line. and also move the lines around when spraying them, lift them up, push them down softly. im sure theres more then just the brake booster line. any small plastic lines are vac lines, the rubber ends on them crack.
 
Are you sure the defrost isn't kicking on causing the 100rpm drop?

Vacuum leak will be consistent, not occasional.
 


My defrost doesn't kick on the A/C due to a leak somewhere in the system. I checked all the lines and injectors and no leaks, I'll check the plugs.

Turns out my cooling fans don't work anymore too, figured that out a few days ago. The fans work with 12v, the relays and fuses are all good and tested working, and the fuse box wiring is fine. So I'm hoping it's a bad coolant temp sensor.
 
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