Hello all, just have a frustrating intermittent fault with a '91 3.5L V8i, dual fuel. Symptoms are like this:
Drive for 30 minutes with no problem.
Then occasional stumble as though key has been turned off momentarily.
Occasional stumbles get longer until engine stays off. It is not a misfire, just a hard cut to engine power. Other electricals keep operating such as head lights, radio, even tacho continues to show correct engine RPM while coasting. After a few minutes the engine can be restarted and runs perfectly. All happens the same whether running on lpg or petrol. During the stumble I notice the LEDs on the lpg gauge/selector go out, and then only when they come back on can the engine be restarted. A click is heard which sounds like the gas solenoid.
My thoughts:
Prob not ignition coil/leads as this would also kill tacho, and result in a lot of backfiring?
Prob not ignition switch as lights, radio, tacho would also go out?
Could it be the inertia cut-off switch? Engine has died once while stationary which makes me think probably not.
Any ideas? I'm really not sure if its going to get me home from work or not!
Cheers,
Scott.
Drive for 30 minutes with no problem.
Then occasional stumble as though key has been turned off momentarily.
Occasional stumbles get longer until engine stays off. It is not a misfire, just a hard cut to engine power. Other electricals keep operating such as head lights, radio, even tacho continues to show correct engine RPM while coasting. After a few minutes the engine can be restarted and runs perfectly. All happens the same whether running on lpg or petrol. During the stumble I notice the LEDs on the lpg gauge/selector go out, and then only when they come back on can the engine be restarted. A click is heard which sounds like the gas solenoid.
My thoughts:
Prob not ignition coil/leads as this would also kill tacho, and result in a lot of backfiring?
Prob not ignition switch as lights, radio, tacho would also go out?
Could it be the inertia cut-off switch? Engine has died once while stationary which makes me think probably not.
Any ideas? I'm really not sure if its going to get me home from work or not!
Cheers,
Scott.
