jwahaus

My truck has recently developed a problem of stalling when idling.

The scenario is always the same: When running short trips around
town where the engine is turned off for 5-10 min and then restarted.
After the 2nd or 3rd time I restart the engine, the engine will stall
after running for a few seconds/minutes. In all cases where this happened:
the weather was hot, AC running full blast, and the truck is stopped
at a light idling. It has done this now 3 or 4 times in the last couple
of weeks. When it stalls and I restart the engine, the check engine
light will come on. My OBDII reader always shows Trouble Code 1300
as the problem which in Toyota Speak is: "Igniter Circuit No. 1. malfunction"

Anyone have an idea as to what might be wrong? I'm not sure the
trouble code is telling me anything other than the engine stalled.

The engine (apart from stalling every once in a while) runs very well
and smooth. Idle is also generally very smooth.

When the engine stalls, it is typically a little harder than normal to restart.
Kind of like it has vapor lock.

Any ideas or suggestions are greatly appreciated.

the_supernerd

I am not sure what is causing it, but maybe you should inspect the wiring going to the first igniter for any breaks or bad connections.

4-RUNNIN' FREAK

Just looked in the software that came with my OBDII scanner. No description.
I tried.

MTL_4runner

Check the plugs and make sure none are damaged and then look at their color. A bad igniter may show itself that way by having one much darker than the rest (normal burning plug will have a gray color and a very light brown tip....bad burning plugs are usually jet black, not to say that there is actually anything wrong with the plug iteslf). If you do find one then you need to use the FSM to check the ignition circuit for that plug(s). It is pretty detailed on how to check the igniter iteslf and troubleshoot any other associated wiring.

Funny I couldn't find trouble code P1300 either but I would start there....

4RUNR

P1300 is a Toyota specific code, "Igniter Circuit Fault #1".

mark_simon

my 4 runner has been doing the same except I dont get a trouble code. I have a 96 with 110K. Had a major tune-up at 90K so that shouldnt be the problem.

rimpainter.com

After troubleshooting the igniter...

Is it possible that the AC idle up function is not working?

jwahaus

Yea, my theory is that the AC compresser every once in a while
puts too much drag on the engine at idle and stalls it when it
cuts on.

Starting and stoping the engine multiple times within a short
period of time seems to cause the engine to idle slower than normal
for the first 5-10 minutes of driving. During this slow idle period
the engine is more likely to get stalled from the AC compressor.

Now I havn't actually observed the AC compressor stalling the engine
because my eyes are not usually glued to the Tach.

It's been a couple of weeks now and it hasn't happened again yet.
Hopefully this problem will go away by itself.

koda4

I would be suspicious of the 7th injector piggy back ECU or the wire harness that came with it.

I too have the 7th injector kit and once received a p1300 or p1500 code which I scanned and said something to do with igniter fault.
Some of the diagnostic procedures refer to testing the ECU wiring harness.

The check engine light went out by itself and I have not received it again.
After my 7th injector kit was installed, I noticed I needed to crank the engine more to start it then before I had the kit.

The dealer checked my 4runner(2000) and said it starts normal. It does start every time, but varies between 1 to 5 cranks before it starts. Prior to the kit it started everytime on the 1st crnak of the engine.

Please let me know if you do find out the cure for your problem.

Thanks
KOda

jwahaus

I didn't notice any difference in starting after installing the SC and 7th IJ
My 3.4L has always needed around 3 cranks to get started.

I have also been using octane booster. It is possible that this additive has
contributed to this problem. I'm running a tank without right now and so
far no problems but time will tell.

Cheers,
-Jeff-

rhschoon

Thought folks here might like to hear what my situation was and how it played out. We were driving our 1997 4Runner (SR5, V6, manual, all original, 200k miles) last sunday here in Iowa. It just died. It had been randomly missing with no error codes for about a year and a half. The check engine lite came on and when checked it was a p1300. Looking on line found it was the igniter. I ordered one from Amazon and installed it on Wednesday. The engine started but now ran really rough, throwing P30x codes (all cylinders showing misfires.) I bought and installed 3 new coils today. Fired her up and that appears to have fixed everything. Engine's running smooth and no codes being generated. It appears that the coils failed, several of them, and took the igniter module out. Hopefully this will help somone else out who gets this cryptic code.