>> Have a 93 4Runner V6, since new.
>> 1. Does the fuel pump start pumping when you turn on the ignition or
>> when you turn key to start?
>> &
>> 2. It seems as though it isn't getting gas, like its drained away or
>> lost pressure. Is this plausible?
>>
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>The fuel pump works only when the engine is turning, like when cranking or
>when it is running., Just turning the ignition on will not activate the >fuel pump.
Thanks Ray O
So just to explore. Cranking or running. So I guess the fuel pump starts pumping right away & then stops when required pressure reached. (Now I'll stop turning the key & counting to 10 before cranking) Do you know that pressure? And how long before fuel pump could rebuild required pressure, from a low point. Wouldn't think it would be too long, would you? And my stuttering. It's almost like air in the lines & not enough fuel. And then I pray it kicks over.
>From the symptoms you are describing, the fuel pressure regulator is leaking
>down. This can be checked by installing a fuel pressure gauge and letting
>the vehicle sit to see if the pressure drops excessively over time.
Any idea how long the system is required to hold pressure? Any scale for degradation over time or is it obvious?
sorry for extra questions and appreciate the input.