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Larrysr1957's avatar
Larrysr1957
Explorer
Apr 16, 2021

Engine idle surges up and down when stopping at lights

I have a 97 ford 460 that has an idle surge and sometimes stalls when stoppingat traffic signals or signs. The mechanics has replaced the throttle positioning sensor and the idle air control and clea...
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doxiemom11's avatar
doxiemom11
Explorer II
Apr 17, 2021
I had a GMC Jimmy that did that. EGR valve kept clogging with carbon. Hubby would take it off, blow it out with air compressor and then it was good for about 3 months. If we didn't do that, the idle got worse and it would stall, service engine light would then come on. The surge is what told me it was starting again and he needed to do that.

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