Hello - laurac
That is okay about AZ not finding any codes. . ...it will make it a little more. . ...interesting but we will be fine. The thing we did find out is the battery, alternator and starter are okay.
As for the spark plug, you mentioned your father-in-law, could he do this, or your husband, or someone else. . .maybe a neighbor you are mad at and a good shock will cheer you up. . ..JUST KIDDING of course. But we do need to see how it is sparking. The best time to do this is when it stops. . ..after the 10 minutes during the after 10 minute to 1 hour thing. You could do it right now to see how it looks. That will give you something to compare it by. Although after looking at your engine, you have 6 independent coil packs, one per plug. So it may be hard to do in the middle of the street.
Normal maintenance schedule - your spark plugs should be changed at 105,000 miles, better at 75,000. So you are about 47,000 - 77,000 over a good tune up. This should also be the fuel filter.
No, it doesn't sound like a carburetor. . ..you have a throttle body on this vehicle. . ...so not exactly like a carburetor but you father -in-law is thinking down the right path.
With this many miles. . ..which isn't a lot, but this is about when these things happen, if we can narrow it down, if it is fuel I am thinking your fuel pump is starting to go.
If it is electrical, it may be a crank sensor or it could be an ignition switch or something like that.
On this model, you have an ASD, Automatic Shutdown Relay that provides battery voltage to the ignition coil (the ones on the plugs). The PCM provides a ground contact (circuit) for energizing the coil. When the PCM breaks the contact, the energy in the coil primary transfers to the secondary causing the spark. The PCM will de-energize the ASD relay if it does not receive the crankshaft position sensor and camshaft position sensor inputs.
I have attached the check out for the ASD. All you need is an ohm meter. There are two different types, so make sure you match accordingly. Also, check out the fuel pump relay with this check also.
NOTE: Two styles of relay may have been used (Fig 77 or Fig 78).
Both styles of relay can be tested using this procedure.
The following description of operation and tests apply only to the Automatic Shutdown (ASD) and fuel pump relays. The terminals on the bottom of each relay are numbered (Fig. 29).
OPERATION
Terminal 30: Is connected to battery voltage at all times for both the ASD relay and fuel pump relay.
Terminal 85: The powertrain control module (PCM) grounds the coil side of the relay through terminal number 85.
Terminal 86: Supplies voltage to the coil side of the relay.
There is no wire terminal in the cavity.
OFF Position
Terminal 87A: When PCM de-energizes the ASD and fuel pump relays, terminal number 87A connects to terminal 30.
This is the OFF position.
Terminal 87A is the center terminal on the relay.
There is no wire or terminal in the cavity.
In the OFF position voltage is not supplied to the rest of the circuit.
ON Position
Terminal 87: When the PCM energizes the ASD and fuel pump relays, terminal 87 connects to terminal 30.
This is the ON position.
Terminal 87 supplies voltage to the rest of the circuit.
TEST
Remove relay from connector before testing.
With the relay removed from the vehicle, use an ohmmeter to check the resistance between terminals 85 and 86 of the relay. The resistance should be between 70 to 80 ohms .
Connect the ohmmeter between relay terminals 30 and 87A of the relay. The ohmmeter should show continuity between terminals 30 and 87A.
Connect the ohmmeter between relay terminals 87 and 30 of the relay The ohmmeter should not show an open circuit at this time.
Connect one end of a jumper wire (16 gauge or heavier ) to relay terminal 85. Connect the other end of the jumper wire to the ground side of a 12 volt power source.
Connect one end of another jumper wire (16 gauge or heavier ) to the power side of the 12 volt power source. DO NOT attach the other end of the jumper wire to the relay at this time. WARNING: Do not allow ohmmeter to contact terminals 85 or 86 during this test .
Attach the other end of the jumper wire to relay terminal 86. This activates the relay.
The ohmmeter SHOULD show continuity between relay terminals 87 and 30.
The ohmmeter SHOULD NOT show continuity between relay terminals 87A and 30.
Disconnect jumper wires.
Replace the relay if it did not pass the continuity and resistance tests. If the relay passed the tests, it operates properly Check the remainder of the ASD and fuel pump relay circuits. Refer to electrical diagrams.
Can you take your car to get a fuel pressure check to check out the fuel pump? This would be great.
If possible, see if it is possible to remove a coil and plug boot to put something in the bottom to be able to check the spark. If you can. . ...then if it stops before you get back to me. . ..do this check so we can see if you are still getting a spark.
Next, have a can of starting fluid. Next time it stops. . ...give it about 12 minutes and of course try to start and it shouldn't. Spray some starting fluid (follow directions on can) into the throttle body. . ..I attached two pics, the first is where it is and the second is without the air cleaner hose on it and the arrow shows where to spray. Put the air cleaner back on and try to start.
This is my thought. . ...see what you think. For now, get the fuel pressure checked and check out both ASD and Fuel relay. Be ready to do the above tests with the plug and starting fluid.
Once we do figure it out, then you need to get the plugs and fuel filter changed.
Thursday, November 20th, 2008 AT 10:17 PM
