IAC note sounds like vacuum leak

1997 DODGE RAM
262,000 MILES • 5.9L • V8 • 4WD • AUTOMATIC
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KIMBERLEY72
  • MEMBER
  • 1 POST
Replaced crank sensor and IAC note sounds like vacuum leak. No codes no prior issue.
Dec 12, 2016 at 6:11 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check for a vacuum leak like broken hose/off etc. also, check fuel pressure with a gauge auto parts rent it. check for duct work between air cleaner and engine for holes/ off. See link.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Dec 12, 2016 at 11:59 PM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,366 POSTS
Check over all the vacuum lines, especially the ones that run through the firewall, with that many miles you may have a cracked/broken line. Very easy to knock one off.
Dec 13, 2016 at 12:00 AM
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