'92 Miata, surging problem, 85,000 miles.

If you haven't replaced the ignition wires and plugs, this is a good place
to start.


"~AlicGinnis~" > wrote in message
.. .
> Thanks for all of the input.
> So far I haven't done anything. The next day it ran fine. I drove it 5
> miles, stopped for 1/2 hour, and then drove it 5 miles back all with no
> incident. It ran normally, and continues to run normally on short trips.
> I haven't taken it more than 5 miles out since my post.
> Does this help any in the diagnosis?
> Thanks,
> Mike
>
> "~AlicGinnis~" > wrote in message
> .. .
>> Hi,
>> I bought this car used 2 years ago. It had been left out under a tree,
>> and the drain line from the fuel filler well was clogged. Rain
>> overflowed the well and went into the gas tank. The seller drained the
>> tank, and got it going. I put some alcohol fuel treatment in it a couple
>> of times and it has been running fine until today. I keep it garaged.
>> The symptom is fuel starvation. When I step on the gas, the motor starts
>> to die, and if I lift off the gas, it smooths out. I limped home 15
>> miles this way this afternoon doing mostly 45 mph..
>> I'm going to start by replacing the fuel filter, and if that doesn't fix
>> it, also replace the fuel pump. If 85,000 miles since '92 is about the
>> useful life of a fuel pump, I'll replace them both at the same time. So
>> my questions a Am I on the right track, and is the fuel pump past its
>> useful life cycle?
>> Thanks in advance for any advice.
>> Mike
>>
>>
>>
>
>

~AlicGinnis~ wrote:
> The symptom is fuel starvation. When I step on the gas,
> the motor starts to die, and if I lift off the gas, it smooths out.


Just something to check: There has to be a venting valve to allow air to go
into the tank while fuel goes out to the engine. If air has trouble to get
in, you'll get fuel starvation. Hope this helps.