1992 Camry V6 - No Spark

My Son drove the 92 Camry into about 2 feet of water. Engine originally sucked water into cyl #4 and hydro locked. I sucked water out and got it turning over, no noises indicating trouble from this. I originally had spark, now I have none.

I followed many of the troubleshooting tips and forum advice. I have checked fuses, resistance levels, voltages to coil, ignitor etc....... Rotor turns, pistons up and down...

Swapped out parts with salvage yard parts: Distributor, ignitor, coil, ECM........ still no spark!!!

Any advice? Thanks.

In the Diagnostic's port short E1 & TE1 - make sure the CEL flashesh on off at a steady pace (On every 1/2 second). If it doesn't you've got a power problem to the ECU - EFI fuse or Main relay.

If that's good, chemake sure electrical connections are all plugged back on. Distributor->ECU, Coil->ECU, Coil->Distributor.


Make sure the new distributor cap isn't cracked or damaged. If any amount of moisture is in them, it'll insulate the rotor from the pick-ups & you won't get any spark.

Thanks Toys, Funny you should ask about the CEL. The CEL does not flash ever. The CEL does not come on when I turn the key to ACC., and it doesn't come on when the TE1 and E1 are jumpered.

The ECU fuse is the fuse in the Box by the battery correct? It is a metal round fuse/relay in mine. I have not been able to determine it's functional status. Is there other locations for fuses or relays that are not obviously seen in the fuse boxes? Hidden or other that could affect the ECM/Ignition in this way?

Yep, fuse box nearest the battery!
There is no power going to your ECU. The round thing is the main relay.
The EFI fuse is the fuse marked EFI.


There is nothing hidden. You need the EFI fuse intact & the main relay to turn on to get power to the ECU.

Hey Toys, I verified the main relay is working and there is voltage going to the open circuit relay. I also verified open circuit relay is functioning and voltage to it. I verified the Bat, +B, and B terminals have voltage at the ECU.

What is the best way to verify a lack of power to the ECU? Voltage checks at the ECU - Where?

What next? Help.

One side note, not to confuse the "No Spark" problem, the ignition key interlock relay seems to stay on, which means I can never remove the key without kililing power at the battery or disconnecting the relay itself.

ECU connector D (The 22 pin one on top)
Check for voltage on pin 1
Black wire-Orange stripe
And
Pin 12
Black wire-Orange stripe

Less they're cut if there's voltage at B+ in the connector, there should be voltage at the ECU.



btw I missed it, but the key has to be ON for the CEL to light up.

Here is the fix: MAF. It appears the MAF sensor was damaged by the flow of water through the intake when the car hit the water. The MAF was shorting to ground the +5V between the ECU and the MAF. This caused the ECU to shutdown, thus the CEL never came on, and No spark occured.

Thanks for all the input AF!

Advice: Tell your kids to stay home when it is storming out!!!! Cars are not submarines.

Good thread, but was is an MAF?

Mass Airflow Meter
He has an AFM Air-Flow Meter


Good job ehrets!