taikowaza

when checking for any exhaust or vacuum leaks, what are the best ways to pinpoint the culprits? I seem to remember reading about spraying an aerosol or fluid and looking for bubbles or change in idle but I want to make sure. If there is a better way I'll follow that. I'd like to find out the cause of the slight 'bucking' I am having on cold mornings until things warm up. thanks

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92 4runner,Thorley Ceramic Headers,Stan's Custom Exhaust,OME Suspension,DowneyHDCoils,MarlinHD Clutch,PIAA520s,24/30"Magnaflow Muf/Cat,Warn Hubs,BudBuilt IFS Skid+Xmbr,Sonoran Truss,Odyssey Batt,33x10.5 BFG A/T,ISR Mod,Boyle's Alternator,TJM T-15,Demello Sliders,Warn XD9000,Dual 4.88 Truetracs,LCE bored TB,Weasy Cams,NWMP Xtnd Range Tank, and most important,Husky Liner WOT Mod :)

Matt16

You could up pinch off the hoses one by one where they enter the TB. If the idle goes up when you pinch off a certain hose, the leak is upstream of the pinch point of that hose.

The aerosol can idea goes like this; you spray an flammable evaporating aerosol (so the spray doesn't leave a mess) over the vacuum lines, if your idle jumps up a bit, the flammable spray found it's way into the intake via the leak.

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1990 Toyota 4Runner 22RE 5spd
*Aussie Locker*York OBA*

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22mr2

use a unlit propane torch and wave it around slowly where u think a leak is. The engines vacuum will pull in the propane and make a change in the idle speed

slisdexia

wish I'd thought of that unlit propane torch idea for my truck.... if you spray the lines down, do small portions at a time, and use quick sprays. don't hose the whole thing down at once, you'll never figure out exactly where your leak might be

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I blame the automatic transmission for the wussification of America


1983 Toyota Pickup. 22r, 5 spd, 4x4, totally sweet chrome steelies and 31x1050 mud kings, and now an Aussie Locker.

taikowaza

thanks guys- I will try the unlit propane torch and listen to the idle speed for changes. I'll post back if I find anything.

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92 4runner,Thorley Ceramic Headers,Stan's Custom Exhaust,OME Suspension,DowneyHDCoils,MarlinHD Clutch,PIAA520s,24/30"Magnaflow Muf/Cat,Warn Hubs,BudBuilt IFS Skid+Xmbr,Sonoran Truss,Odyssey Batt,33x10.5 BFG A/T,ISR Mod,Boyle's Alternator,TJM T-15,Demello Sliders,Warn XD9000,Dual 4.88 Truetracs,LCE bored TB,Weasy Cams,NWMP Xtnd Range Tank, and most important,Husky Liner WOT Mod :)