I thought I would try this group in hope of more responses.
I have recently been having random stalling with my 1990 4runner 3.0 V6
5 speed. It seems to run fine. I will be driving along and it just dies
like it was turned off. It doesnt start right back up right away ...but
after a minute or so it starts back up and runs fine once again.
Somedays it never stalls and today it stalled like 5 times on my way
home from work Grrrrrrr.
Hotrter than usual out today if that helps. Guages seem normal and
there is no check engine light on.
So hmmm after reading a few posts in this group it could be a few
things. Quite a few posts say it could be my EGR valve. Others guess at
coolant temp sensor, ignition coil, primary secondary ignition
systems??? or fuel filter.
What I am wondering is there some way to test the EGR valve. Can I
bypass or remove vacumm temporarily? Any other tests I can perform? How
about a cure for when I am stranded on the side of the road. Hopefully
I was hoping to try and repair it myself before heading out to the
Well I disconnected the vaccum line to the EGR valve to see if this
would cure my random stalling. And of course on the way into work it
stalled 3 times....:-( . I guess thats not it. But strange enough I
thought my problem was getting worse but on my way home this evening it
didnt stall once !!! Yesterday it was really hot outside and stalled
like 5 times. And this evening it was much cooler and raining and didnt
stall once. I dunno coincendince ? I havent noticed anything out of the
ordinary with the temp guage.
Someone had mentioned a temperature sensor failing in one post I read.
Could this be the culprit? Where is this sensor and can I bypass it
temporarily to see if this is the problem? But then again I am not
getting a check engine light?
I am still reading as many post as I can about stalling 4runners and I
found another post that seems similar to my problem. Except it was a 4
Where a wire wire to the ECU was shorting out intermittently. They
insulated it, and the problem *finally*
seems to be cured. The
explanation written on the invoice
says "Stalls due to loss of TGF signal to ECM. Shorted due to wire
being worn through on fuel rail." The service manager told me that
this was causing the ignition computer to shut off the fuel injectors.
"This is actually called Igf, or ignition fired, this is a confirmation
that you have after Igt or ignition trigger , no igf, youll loose
there is a spot near the center of the fuel rail that rubs through the
wire harness (fixed mine before it became trouble) but its usually
the 15amp EFI fuse (power one side of injectors), they where probably
being straight up with you.
Rick, Toyota Master/ASE Master/L-1 "
Where is this wire harness located...like what and where is the fuel
I would like to check this out. I suppose you think it would blow the
fuse but anyway.
What do you think?