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Engine slightly missing at low speed (Opinions)

Old 07-06-2015, 02:15 PM
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rrc715
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Default Engine slightly missing at low speed (Opinions)

Guy's, my 95 993, recently started surging (for a lack of better terms) at low speeds. almost like it is short of fuel.

Could this possible be a dirty fuel filter or could it be the DME getting ready to fail?

In any case, have any of you experienced this before i start running in the wrong direction trying to figure it out or am i just over reacting to something that is normal. It is very slight as I drive slow and it just started doing this. It does not occur while accelerating but when traveling at a steady slow speed.

RRC715
Old 07-06-2015, 02:21 PM
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CHJ
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ISV clean?
http://www.pistonheads.com/gassing/topic.asp?t=977858

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Old 07-07-2015, 02:57 PM
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kjr914
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Originally Posted by rrc715
Guy's, my 95 993, recently started surging (for a lack of better terms) at low speeds. almost like it is short of fuel.

Could this possible be a dirty fuel filter or could it be the DME getting ready to fail?

In any case, have any of you experienced this before i start running in the wrong direction trying to figure it out or am i just over reacting to something that is normal. It is very slight as I drive slow and it just started doing this. It does not occur while accelerating but when traveling at a steady slow speed.

RRC715
How is it "surging....like it is short of fuel"? Wouldn't it be dying? Are the rev's going up (surging) or down?

Misc thoughts:
ISV (2nd'ing the above comment, but should be only issue at idle. clean anyways)
Check for vacuum leaks
Probably not a DME, but throw your backup one in there for a while. (WHAT? You don't have a backup DME in the car? Shame on you... )
Where's your preventative maintenance at? Plugs, wires, cap, rotor, fuel injector cleaning, fuel filter... How many years/miles/condition?


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