Scotty,
I have a 97 toyota avalon XLS, 297,000 miles, automatic, no codes, check engine light is not on.
The EFI fuse (15A) blows when driving. With a new fuse the car starts, idles, revs and all systems work. I could drive it a few miles before it would blow again. Driving it around has made it worse and now when I put it in drive and get it moving a few miles an hour it blows the fuse. Still with a new fuse it runs, revs, idles in park. I can put it in gear (R & D) and give it gas with my foot on the brake and it stays running. I've tried wiggling wires and shaking/bouncing the car with it running trying to short it out if there's a wire rubbed through somewhere. I've tested the EFI relay and circuit open relay. I've also switched them both with Fan relays and determined they are good. I've replaced the fuel filter with no change (some google searching gave me this idea and it was cheap). There seem to be several other things on this circuit when searching the wiring diagram. My next thought is to test/replace the fuel pump but I doubt it's that since I can rev it fine. But that isn't very difficult with access under the back seat. Any thoughts? Maybe other items on the circuit I should look at or unplug to see if the problem continues? I wish it would short out completely so I can isolate and find it, but I'm running out of fuses.
Thank you for your time, Seth
searching the wiring diagram
can you post the diagram please
Hopefully this works. I put my vehicle in Autozone and this is a link to the schematic they had. It's diagram 3. The fuse is at the top of the schematic. I don't see a way to add an image.
there's a lot of things on that circuit.
my only idea is this: replace the fuse with a circuit breaker (so you don't have to keep replacing them)
use a DC current clamp meter to monitor each device on the circuit, one by one, and just watch for spikes in current
The circuit breakers work well. There is a 5 pin plug on the front of the trans immediately next to the neutral safety switch. It has 5 pins and looks similar to the speed sensor in that it has 1 bolt holding it on. When I unplug that, the car runs and drives in reverse fine. In drive the transmission slips very badly, but the circuit doesn't blow. Do you know what this item is? I've unbolted it and it comes out but there are wires running down into the transmission. I'm not sure if something is broken off in there or if this is just a connection port.
The circuit breakers work well.
you car had circuit breakers?
It has 5 pins and looks similar to the speed sensor in that it has 1 bolt holding it on.
sure it could be a sensor. Most likely it has numbers on it that you can search on the web.