Tiddliewinks

Let me preface this with the fact I am an idiot when it comes to cars... You need something involving software? I'm your guy. You need a knife made/sharpened. I'm your guy. You want to know something about the inner workings of the funeral industry.... you get the point. But when it comes to anything with wheels and it drives I'm at a complete loss, so I figured I'd come to a place where perhaps I can find an answer. After a cursory search I found nothing explaining my particular problem so now it's time to post. Thank you for bearing with me through all of that, and in advance for anything you kind folks might be able to tell me.

Okay so basically this truck won't stay running when it rains. It'll turn over won't stay going though. To answer the next question the plugs/wires/distributor/cap have all been replaced as well as a few other odds and ends in a desperate attempt to ultimately grasp at straws...
What foreign sorcery will it take to get this thing fixed?

fdp101452

If you move here, rain wont bother you much.........

sechott

A little more info could help. Does it stay running if it starts raining while you're driving? Is it a v6 or 4cyl? Does it act up with light sprinkle or downpour? What I might do is get a cup of water while the engine is running, pour it at different locations until it reproduces the issue. That way I might be able to at least isolate the area of the fault.

scope103

There are two major areas where electrical will cause the truck to stop running: ignition and fuel pump. For ignition, the distributor cap is a good guess, but I suspect the connectors. I'd use a spray bottle of water (a cup of water is overkill) on the distributor, igniter and ignition coil.

The VAF has a switch that operates the COR that keeps the fuel pump running after you start. Spray water right on that unit and connector.

If the VAF has internal problems (which explains how water gets to it), you can even do a more robust test by jumpering Fp to B+ on the diagnostic connector. That essentially bypasses the safety function of the VAF/COR circuit. But for this test to do anything, you'd have to get the truck in a place where it will "usually" fail and see if the jumper prevents that.

RAD4Runner

YUP!

Also inspect for leaks above or around the ECU (right-side kick panel, correct?)
1) There are holes where harness enters the body from outside. If it is not waterproof properly, splashes from tire could get in and wet the ECU.
2) Windshield could also leak and drip on ECU.


NAH... Move to San Diego

Ghrrum

I'm betting you have a short in the wiring somewhere. You need to figure out what chunk of the system is shorting out, if you have a multimeter you can check power going to the fuel pump to rule that out. Then check power going to your ignition system.

bswarm

Get out the garden hose and run water along the hood to body & fender joints, then open the hood and see if the coil tower is wet. I had one come in doing that, fixed it by installing a rubber coil cover.

ZUK

iTrader: (1)

Aftermarket plug wires can be a problem...if you notice a stumbling while driving in the rain, I would suspect sprk plug wires or even the cap and rotor. Remove the cap and thoroughly inspect the rotor. Do you see any signs of carbon arcing......a slight thin black trail?

edit-----take a can of WD40 along and when it won't start spray wd40 all over the inside of the cap and on the rotor. If it starts right up then you need new cap/rotor....go oem. I spent 4 years as an Autozone red shirt and I pretty much use only oem in regards to certain items like the big 3 just mentioned.

Also, at night....lights out....pop the hood and listen for arcing. Look for arcs on the plug wires.