'98 4Runner engine help needed

[JonDuke]

I don't know anything about cars, but a great friend is having a problem with his and thought I would throw it up on here to see if anyone can suggest anything at all.

He writes:

"1988 Toyota 4Runner with a 3.0 V6. I replaced the engine last year due to water in the air intake. The engine is sound,compression is 150 psi on all 6 cylinders and the timing is set properly. I've replaced the spark plugs,mass air flow sensor,throttle body and the distributor cap and rotor button. All the wiring is plugged in as it should be,I have the shop manual for it and its all been done right. Also,the fuel pressure holds at 44 pounds,as per specification. (Itll run but it floods itself out with the cold start injector) Someone help"

Can anyone suggest anything?
Thanks!

[Barnes]

So it starts but stalls after being flooded by the cold start injector? Has the switch that it controls it been replaced. It should fire the injector at first when cold then a little less as it reaches a warmer temperature then shut off.

[zamler]

3VZ-E is a terrible engine. But anyway...

The Start Injector Timing Switch aka cold injector time switch is probably bad, causing the engine to flood. I believe it is the sensor near the fuel pressure regulator (end of the fuel injector rail) but I don't remember exactly I have not worked on one of those engines in years.

edit - go to page 524 of this service manual (.pdf document) it shows how to test the switch.

[firebug]

Is he local?

There is a great toyota 4wd club i am involved with: www.ct4wd.com

They have lots of very knowledgeable members and a decent forum.

It's a great club for anyone interested in ethical off-roading (toyota owner or not).

[EVERLAST]

^^^^^^^THIS IS TRUE ^^^^^^ FREE HELP from passionate owners...knowledgeable group