Intermittent stalling

JOE SO AND SO

MEMBER
1996 TOYOTA CAMRY
2.2L
4 CYL
2WD
AUTOMATIC
283,000 MILES

First time in the morning, the car starts and after a while stumbles and shuts off. Cranking at that point, it starts and shuts off immediately. If you wait five or so minutes, it will start again and run fine all day long. Code reader shows code P 1300, primary ignition. I have replaced cap and rotor, plugs, and coil so far. Of course, we are reading it while it is working fine. Something is hiding from me.

11 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

Looks like this could be a wiring issue between the igniter and the ECM.

Below is the description and I attached a wiring diagram for you to view.

Roy

DTC P1300 Igniter Circuit Malfunction

CIRCUIT DESCRIPTION
The ECM determines the ignition timing, turns on Tr1 at a predetermined angle (°CA) before the desired ignition timing and outputs an ignition signal (IGT) "1" to the igniter.
Since the width of the IGT signal is constant, the dwell angle control circuit in the igniter determines the time the control circuit starts primary current flow to the ignition coil based on the engine rpm and ignition timing one revolution ago, that is, the time the Tr2 turns on.
When it reaches the ignition timing, the ECM turns Tr1 off and outputs the IGT signal "0".
This turns Tr2 off, interrupting the primary current flow and generating a high voltage in the secondary coil which causes the spark plug to spark. Also, by the counter electromotive force generated when the primary current is interrupted, the igniter sends an ignition confirmation signal (IGF) to the ECM.
NOTE: The ECM stops fuel injection as a fail safe function when the IGF signal is not input to the ECM.

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Friday, June 21st, 2019 AT 1:10 PM

JOE SO AND SO

MEMBER
7 POSTS

Wow! Total response. It seems to me the issue is related to warm up, like a stuck choke or something. I will go check the wiring, thinking at one point yesterday, I had the entire air filter system off, from the rubber hose connecting to the throttle body. By the way I cleaned in there up to the flap. While it was off, I started the engine and it ran fine. Going to retry this today. Maybe something in the air intake system? This thing is weird. This air cleaner has a bunch of stuff on it.

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Friday, June 21st, 2019 AT 1:27 PM

ASEMASTER6371