Hi! I bought a 94 4runner in April and have put almost 15k miles on it since then. It has ran beautifully up until a week ago. I took it 4 wheeling one night then the next day drove it around in the traffic and heat of southern California. Ran fine that day until I parked it for a couple hours then went to move it. The truck would crank over and start for no more than 1 second.

My first instinct was that the air flow meter or circuit opening relay were malfunction. I jumped the FP and b+ connections in the diagnostic plug to bypass the two and still... same problem. I can hear the fuel pump working just fine though.

The engine will run if I spray starting fluid directly into the throttle body so I know that the engine is getting sufficient spark.

I was told that the 3vze distributor has sensors in it that allow the injectors to get pulse so I tried another distributor I had laying around. Still same problem. Also tried a different ECU. Same problem. Injectors are not getting pulse.

If there are any 3.0 gurus that have any insight to what the problem may be I would greatly appreciate any input.


Thank you.

 

It comes down to either physical damage to the wires

poor connections someplace The ECU ground comes to mind

Bad ECU if the one you tried is known to be good ??

You just need to start at the power source and trouble shoot.

Does it quit as soon as you release the ignition switch from the start position ??

 

Remember that the VAF has to be connected to the induction plumbing to run (otherwise, the VAF sees no air flow). Just how did you manage to spray starting fluid into the throttle body?

The injectors produce an audible click. I like this gadget http://www.harborfreight.com/mechani...ope-69913.html, but you gotta wear a white lab coat to use one. ;^) A tube from a roll of paper towels, or a piece of big fuel line, will work too.

Any codes? Check for stored ones too. If you, for instance, lost the IGF signal the ECU quickly shuts off the injectors (and should throw code 14).

 

Have you checked the ground on you intake plenum? I experienced this symptom before and was just a bad ground.

 

i would test the vafm first thing.

 

If the problem persists with the fuel pump jumpered in the diag connector, it's not the VAFM. Most likely is a missing IGF signal from the igniter to the ECU, which, as scope says, should throw a code. Check the codes before you do anything else. The engine doesn't have to run to check them.

 

Was throwing code 24. That was it though.

 

Tested ohms on the air flow meter. Lots of flat spots. Has s buddy let me borrow one and it starts and runs every time now. Just won't hold idle. Now to diagnose that issue. :/

 

code 24 should be intake air temp, which is in the vafm. any new codes now? intake piping good?