raunch
09-18-2009, 07:15
Here's the syptoms: This may be unrelated, but during a road trip, I noticed as I was cruising down the freeway, a slight drop in rpms. This drop was intermittent and very slight. Have not noticed the rpm drop since the road trip. Also, I noticed a fluctuation in my voltmeter, from about 10-13volts.
The main syptoms are--2 times, within 1/2 block, the engine quit as I let up on the pedal. Both times it started right back up. After this I took it to my mechanic. He thought it may be the pump losing pressure from pieces of seals within the pump getting stuck in the little glass ball check valve out the return at the top of the pump. This seemed logical, as I have been running biodiesel which could eat away at the rubber seals in the pump. He checked it out, could not duplicate the problem, but did replace a bad battery cable--voltage drop solved.
For about a week all was well until it quit on the decel again. All three times now have been at low speeds and low rpms. The interesting part of the third time the engine quit, was that it would not start again as I turned the key to 'start' position. I had to turn the key back to the 'off' position then to 'start' and it fired right up.
Still the symptoms lead to the check valve, at least it is a cheap an easy way to begin the problem solving. So last night I was preparing to install the valve, and before I started, the mecahanic thought it wouldn't hurt to pinch of the return line out the top of the IP to duplicate the sypmtom. I did that, the engine quit right away, and what's interesting here is that I did not need to reset the ignition back to the 'off' position at the key. I simply went from the 'on' postion to 'start' and it fired right up. So, given the strange things with the ignition, I'm wondering if the problem is an electrical one, causing a voltage drop in the system and shutting down the fuel solenoid on the IP. Any ideas?
Thanks.
The main syptoms are--2 times, within 1/2 block, the engine quit as I let up on the pedal. Both times it started right back up. After this I took it to my mechanic. He thought it may be the pump losing pressure from pieces of seals within the pump getting stuck in the little glass ball check valve out the return at the top of the pump. This seemed logical, as I have been running biodiesel which could eat away at the rubber seals in the pump. He checked it out, could not duplicate the problem, but did replace a bad battery cable--voltage drop solved.
For about a week all was well until it quit on the decel again. All three times now have been at low speeds and low rpms. The interesting part of the third time the engine quit, was that it would not start again as I turned the key to 'start' position. I had to turn the key back to the 'off' position then to 'start' and it fired right up.
Still the symptoms lead to the check valve, at least it is a cheap an easy way to begin the problem solving. So last night I was preparing to install the valve, and before I started, the mecahanic thought it wouldn't hurt to pinch of the return line out the top of the IP to duplicate the sypmtom. I did that, the engine quit right away, and what's interesting here is that I did not need to reset the ignition back to the 'off' position at the key. I simply went from the 'on' postion to 'start' and it fired right up. So, given the strange things with the ignition, I'm wondering if the problem is an electrical one, causing a voltage drop in the system and shutting down the fuel solenoid on the IP. Any ideas?
Thanks.