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Bucking at low speeds and stalling at idle

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Pozobyt

10+ Year Contributor
177
0
Jun 22, 2010
lucedale, Mississippi
My Car has been bucking slightly at low speeds (under 20) and has been randomly stalling when i come to a stop.

I can start the car up just fine, and it idles fine, If I drive it for a bit, and come to a stop, it stalls(sometimes) and other times It's fine when I stop. It usually idles around 800 when normal.

The car does this when it's warm, or cold.

It has new plugs, wires, and coil. No CEL.
 
I'd look into a vacuum leak first, then start checking your sensors. It would be strange for it to be a sensor and not throw a CEL. Stranger things have been known to happen, however. You can either do a smoke test or spray soapy water all over your intake to find a vacuum leak....I'd shoot for smoke....

To do a smoke test you need 4 things:
1. Cheap plastic baggie
2. rubber band
3. hose large enough to fit over the PVC inlet to the intake manifold
4. a cheap fat cigar

Remove the intake tube from the throttle body and place the plastic baggie over the inlet port, securing it with the rubber band. Next, remove the PCV hose from the intake manifold side and replace that with the clean hose. Light the cigar and begin to blow the smoke into the hose. Wherever you see smoke coming out is where you have a vac. leak.

If this test concludes nothing, start looking into the CPS, the CAS, or your ASD relays.
 
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