Rough idle

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KEG
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Rough idle

Post by KEG » Mon Aug 03, 2026 7:29 pm

My Probe 2.5 24v 1996 is rough idling but smooths out when driving. HT leads were changed about six months ago. Is it possibly the distributor? It’s quite old now. Or possibly a vacuum leak? Any advice is appreciated.

Micron
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Re: Rough idle

Post by Micron » Tue Aug 04, 2026 7:52 am

How is the water level when cold and looking at the filler on the engine?
The TPS might need some adjustment, or the idle.
Dizzy's normally just fail completely, or when they get warm
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KEG
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Re: Rough idle

Post by KEG » Tue Aug 04, 2026 2:08 pm

Water level is good.
No poor acceleration: The car does not hesitate or jerks when I press the accelerator. No stalling. The car does not unexpectedly shut off while driving or stopping. Just rough idling and a slight thud sound. The rev counter does not deviate much at all only slightly on occasions.

andy p
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Re: Rough idle

Post by andy p » Tue Aug 04, 2026 4:38 pm

You're not putting E10 fuel in her? Mine got lumpy idle the only time I used it. I always use the expensive stuff now.

KEG
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Re: Rough idle

Post by KEG » Tue Aug 04, 2026 7:13 pm

No. Shell V Power.

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