# Engine surge

**URL:** <https://community.cartalk.com/t/engine-surge/79388>\
**Category:** Maintenance/Repairs\
**Tags:** nissan, 300zx\
**Created:** [May 18, 2013, 7:11pm UTC](https://community.cartalk.com/t/engine-surge/79388 "2013-05-18T19:11:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![1990300zx](https://avatars.discourse-cdn.com/v4/letter/1/b9e5f3/32.png) [@1990300zx](https://community.cartalk.com/u/1990300zx)\
**Post date:** [May 18, 2013, 7:11pm UTC](https://community.cartalk.com/t/engine-surge/79388/1 "2013-05-18T19:11:27Z")

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my 1990 Nissan 300zx with 136,000 miles often surges at highway speeds for several seconds then drops back down to normal. the surge is usually 1,ooo rpm. does not happen if not in overdrive, and will not happen unless having been driving for 15 minutes or so. also seems to occur more on hot days (80 degree +) than on cool days. mechanic has looked at this several times but not yet able to determine why.

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**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\
**Post date:** [May 18, 2013, 7:36pm UTC](https://community.cartalk.com/t/engine-surge/79388/2 "2013-05-18T19:36:19Z")

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Does it accelerate when the surge happens? Could it be the transmission slipping?

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**Author:** ![1990300zx](https://avatars.discourse-cdn.com/v4/letter/1/b9e5f3/32.png) [@1990300zx](https://community.cartalk.com/u/1990300zx)\
**Post date:** [July 3, 2013, 8:26pm UTC](https://community.cartalk.com/t/engine-surge/79388/3 "2013-07-03T20:26:20Z")

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no noticable change in speed, just the surge