lennysky53
Excursion Idle Stop Failure
Summary of the thread
The idle stop feature on a 2004 Ford Excursion has stopped working, with error codes indicating a fault and occasional engine shutdowns. A potential cause is a weak battery that may show normal voltage but lacks sufficient current for the idle stop system. A suggested solution is to perform a load test on the battery and consider replacing it if necessary, as similar issues have been resolved by addressing battery performance.
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4 comment(s)
lennysky53 (community.author)
Thanks, I haven't done a load test, but the voltage looks normal when it's running. Could the voltage seem okay but still not be enough for the idle stop?
oskar_koch1
Exactly! The voltage seemed fine when driving, but start-stop needs a lot more current to restart. A weak battery might show good voltage but not have the amps for a smooth restart, causing stalls and errors. Get a load test to check the battery and replace it. That fixed it for me when I went to the workshop. Good luck!
lennysky53 (community.author)
Thanks for the explanation. It sounds like the battery is the problem. I'll do a load test and replace it. The repair cost 290€. Thanks for the help!
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FORD
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EXCURSION
oskar_koch1
I had something similar with my old BMW 5 series. The start-stop was acting up, and then it stalled at lights. The diagnostics gave vague codes. It turned out the battery seemed okay, but it wasn't holding charge well. The start-stop systems are really sensitive to voltage drops. Have you load-tested your battery lately?