I HAVE SENTRA 160 DOHC,WHEN DRIVING AND I WANT BRAKE,REVS COME DOWN AND CAR STALLS?

  • Tiny
  • djtayer
  • 1998 Nissan Sentra
  • 300,000 miles

I have sentra 160 DOHC, when driving and I want brake, revs come down and car stalls?

Saturday, March 24th, 2012 AT 1:44 PM

8 Answers

  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 posts

First eliminate all vacuum or air leaks in the system. You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.

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Saturday, March 24th, 2012 AT 2:10 PM
  • Tiny
  • djtayer
  • Member

Thanks, how do I replace IAC?

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Saturday, March 24th, 2012 AT 2:21 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 posts

Do the other stuff first and then worry about that.

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Saturday, March 24th, 2012 AT 2:27 PM
  • Tiny
  • djtayer
  • Member

Hi, did what you told me to do, still the same. What now?

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Saturday, March 24th, 2012 AT 7:57 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 posts

There are no specific instructions for changing the IAC. It's held in by a couple bolts.

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Saturday, March 24th, 2012 AT 9:49 PM
  • Tiny
  • djtayer
  • Member

Thank you, it worked. Now there's a new problem fuel consumption seems to be a lot, idling is at 2000 rpms, is this normal, I changed the fuel filter, the carburator is okay.

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Monday, March 26th, 2012 AT 5:51 PM
  • Tiny
  • Wrenchtech
  • Expert
  • 19,541 posts

Look for vacuum leaks

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Monday, March 26th, 2012 AT 6:06 PM
  • Tiny
  • djtayer
  • Member

Okay thanks, I know it's a vacuum leak, but where do I start?

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Monday, March 26th, 2012 AT 6:28 PM

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