Hey all, I'm hoping someone with more knowledge about the engine electrical can help me.
I have a 89 bronco with a 5.8 in it.
I had an oil leak that got oil all over the engine so I decided to wash the engine off. I sprayed some degreaser and waited about 10 min, then proceeded to rinse it down with a small pressure washer.
I left the hood open for a few hours while things dried out then got in and it took 3 tries to get it to start. I drove across town and when I shut it off at my friends house it wouldn't start again.
After towing it home I sprayed a small squirt of starting fluid and it fired up. I made it half way down the driveway and it started to sputter and died with the engine light flashing rapidly. I figured things were still a little wet so I let it sit overnight. The next morning it still wouldn't start. When I turned the key on, I heard the fuel pump relay clicking on and off. I remembered that a couple years ago I had washed the engine and the fuel pump relay filled with water and when I replaced it everything worked fine.
Here is where things get tricky. I pulled the cover off the relay and made sure it was dry inside and that it worked. I tried the starting fluid again and it fired up and ran, but when I shut it off it always needed that little squirt of starting fluid to get going again. After doing this 4 times the fuel pump relay will no longer turn on by itself. I can push the relay closed with my finger and hear the fuel pump turn on though.
So I tried using the starting fluid to get it going and holding the relay on with my finger and it still won't run. It will continue to run as long as I keep spraying a squirt of starting fluid every second or so.
I also put a gauge on the fuel rail and I have about 43 PSI getting to the injectors. I've been told that anything 30 or 35 and above is enough to run.
Looking at this wiring diagram, I am wondering if it's ok to use a test light to check the TAN-LT GRN and RED wires on the fuel pump relay. I don't want to nuke the computer.
The best I can figure is that the computer is not telling the fuel pump relay to turn on and is also not telling the injectors to fire.
Anyone have any ideas about what might be wrong or what I should check?
Also a guy at Autozone told me I could get the computer codes by using a jumper wire, but I can't remember how. If someone could refresh my memory that would be great.
Thanks.
I have a 89 bronco with a 5.8 in it.
I had an oil leak that got oil all over the engine so I decided to wash the engine off. I sprayed some degreaser and waited about 10 min, then proceeded to rinse it down with a small pressure washer.
I left the hood open for a few hours while things dried out then got in and it took 3 tries to get it to start. I drove across town and when I shut it off at my friends house it wouldn't start again.
After towing it home I sprayed a small squirt of starting fluid and it fired up. I made it half way down the driveway and it started to sputter and died with the engine light flashing rapidly. I figured things were still a little wet so I let it sit overnight. The next morning it still wouldn't start. When I turned the key on, I heard the fuel pump relay clicking on and off. I remembered that a couple years ago I had washed the engine and the fuel pump relay filled with water and when I replaced it everything worked fine.
Here is where things get tricky. I pulled the cover off the relay and made sure it was dry inside and that it worked. I tried the starting fluid again and it fired up and ran, but when I shut it off it always needed that little squirt of starting fluid to get going again. After doing this 4 times the fuel pump relay will no longer turn on by itself. I can push the relay closed with my finger and hear the fuel pump turn on though.
So I tried using the starting fluid to get it going and holding the relay on with my finger and it still won't run. It will continue to run as long as I keep spraying a squirt of starting fluid every second or so.
I also put a gauge on the fuel rail and I have about 43 PSI getting to the injectors. I've been told that anything 30 or 35 and above is enough to run.
Looking at this wiring diagram, I am wondering if it's ok to use a test light to check the TAN-LT GRN and RED wires on the fuel pump relay. I don't want to nuke the computer.
The best I can figure is that the computer is not telling the fuel pump relay to turn on and is also not telling the injectors to fire.
Anyone have any ideas about what might be wrong or what I should check?
Also a guy at Autozone told me I could get the computer codes by using a jumper wire, but I can't remember how. If someone could refresh my memory that would be great.
Thanks.