elcamino4x4guy

i just bought me an 89 SR5 4runner(3.0 v6 5-speed) on a cold start it will barely even stay running and it gets progressively better as it gets to operation temp. it seems to rev up slowly and has a small hesitation or stumbling feeling while accelerating........any ideas? would a hanes manual get me some good starting points to figure it out?

fourwd1

A Haynes manual might be of some help, but a Factory Service Manual would be a LOT of help.


http://granolaboy.net/temp/toyota_tr...4runner_88.pdf

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- - as seen in FOUR WHEELER magazine July 06 and OFF-ROAD magazine Feb 07 - -

84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, Chevys, AP x-over, BudBuilt x-member, 2" drv trn lift, 36" TSLs, 30 spline Longs

80 something p/u - Buick 231 V6/TH-350 trans, Holley 4 bbl, Weiand intake, dual batts, dual tanks ...

89 4Runner - stock

elcamino4x4guy

im still in a rut with this thing.....ive replaced the fuel filter, checked all vacuum lines and checked for intake leaks and still nothing. i should also point out that my cruise control stopped working the same time it started running bad. Also when its idleing bad/low rpm i can spray a good amount of intake cleaner in and the idle gets perfect. is this a good indication that my fuel pressure is low or at least it tells me my engine is starving for fuel in some way??

jdmccright

I'd cover the basics first, meaning a good old tune-up. Check the air filter, plugs, wires, distributor contacts, coil. These can deteriorate and make ignition erratic (or nonexistent). Clean and regap or replace the plugs, clean the terminals or replace the distributor cap & coil. Hesitation is common with worn plugs and distributor contacts encrusted with oxidation.

Then, check the PCV and EGR valves. They need to be clean and functioning properly or you'll get the low, rough idle you describe. EGRs clogged with carbon deposits are known to cause rough idle and sluggish acceleration.

Then I'd check the fuel line pressure and filter. After that I'd spray around the throttle body, vacuum lines, and intake manifold gaskets with carb spray. If the engine changes speed, there's a leak where you sprayed.

Hope this helps!

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Current Garage:
2003 Pontiac Vibe 1.8L AWD
2003 GMC Envoy XL (aka "fat-a$$") - K&N air filter, otherwise stock.
1995 Chevrolet C2500 2wd, 5.7L - K&N air filter, otherwise stock...my weekend hauler.
1992 Toyota Camry LE 2.2L - K&N air filter.

Vehicle History:
2004 4.7L Dakota Quad Cab 4x4
1996 GMC Jimmy 4wd
1992 Chevrolet S10 Ext. Cab 4.3L
1995 Honda ST1100...my first (and only) new vehicle.
1980 Yamaha XS400
1980 Mercury Bobcat...my first car.

elcamino4x4guy

just to let everyone know i fixed the problem. i took out the plugs and one of them was black with carbon residue. i went to the store and bought Isopropyl Alcohol and put 2 small bottles in my gas tank(works better then injector cleaner). after only 30 minutes of driving it started running perfect. So i had a dirty fuel injector!