barbaroja
Active Member
- Joined
- August 26, 2011
- Messages
- 54
- Reaction score
- 9
- Year, Model & Trim Level
- 1998 Ford Explorer Sport
Hi guys
I have a 98 with gasoline and propane fuel systems
It had some issue on the gas system so I had to use it in propane for like 6 months. until we finally god down to it. We cleaned and tested the injectors. Started running fine on propane so we took it to the gas station and put some gasoline on it.
Then it would not start on gasoline. So I depressurized the gasoline system with the injection rail valve and switched back to propane. It started running very erratically at best but at least we could bring it home.
We triplechecked the firing order, cables are 6 months old, same as spark plugs.
One finding is that the yellow vacuum pipe that goes to the valve under the battery got burned and was leaking fuel... How? It is a vacuum line. We think the fuel pressure regulator may be shot so its passing gasoline back into the red vaccum line and they join near the PCV valve in a triple vacuum port on the upper intake manifold.
Anyways, the fuel pump relay is disconnected so the car should run on propane fine. But is far from that. Next suspects come to be the coil pack and the PCM itself.
Engine fault codes only show o2 sensor codes which are normal when you run on propane so no big deal.
Any ideas or suggestions on how to approach this?
Thanks
Any ideas or guessings that could lead us into a better direction?
I have a 98 with gasoline and propane fuel systems
It had some issue on the gas system so I had to use it in propane for like 6 months. until we finally god down to it. We cleaned and tested the injectors. Started running fine on propane so we took it to the gas station and put some gasoline on it.
Then it would not start on gasoline. So I depressurized the gasoline system with the injection rail valve and switched back to propane. It started running very erratically at best but at least we could bring it home.
We triplechecked the firing order, cables are 6 months old, same as spark plugs.
One finding is that the yellow vacuum pipe that goes to the valve under the battery got burned and was leaking fuel... How? It is a vacuum line. We think the fuel pressure regulator may be shot so its passing gasoline back into the red vaccum line and they join near the PCV valve in a triple vacuum port on the upper intake manifold.
Anyways, the fuel pump relay is disconnected so the car should run on propane fine. But is far from that. Next suspects come to be the coil pack and the PCM itself.
Engine fault codes only show o2 sensor codes which are normal when you run on propane so no big deal.
Any ideas or suggestions on how to approach this?
Thanks
Any ideas or guessings that could lead us into a better direction?
