# Lack of power on replaced engine **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** nissan, 300zx, engines\ **Created:** [June 17, 2010, 1:39pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458 "2010-06-17T13:39:29Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 17, 2010, 1:39pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/1 "2010-06-17T13:39:29Z")
i just got my engine and clutch replaced in my 1993 300zx. when i test drove it today, the response was not what i expected. it ran slower than my Chevy caviler. the engine was less than 70k miles on it, any suggestions? ---
**Author:** ![Bladecutter](https://avatars.discourse-cdn.com/v4/letter/b/aeb1de/32.png) [@Bladecutter](https://community.cartalk.com/u/Bladecutter)\ **Post date:** [June 17, 2010, 3:39pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/2 "2010-06-17T15:39:30Z")
Was the engine known to be good when you bought it? Did it have a compression test and a leak down test done before/after installation into your 300Z? Is the motor actually from a car comparable to your 300Z? BC. ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 17, 2010, 4:05pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/3 "2010-06-17T16:05:04Z")
yeah it has a 3 year warranty, unlimited miles. i am taking it back today more a compression test. is sounds like a truck when i am driving it, it sounds like alot of air in sucking in ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [June 17, 2010, 4:10pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/4 "2010-06-17T16:10:25Z")
Who did the installation?? ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 17, 2010, 4:11pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/5 "2010-06-17T16:11:56Z")
an auto repair shop ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 17, 2010, 4:12pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/6 "2010-06-17T16:12:27Z")
i paid 3500 for the work ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 17, 2010, 4:24pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/7 "2010-06-17T16:24:35Z")
is there anything else that i should ask the shop to look for? ---
**Author:** ![ken\_green](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/ken_green/32/816_2.png) [@ken\_green](https://community.cartalk.com/u/ken_green)\ **Post date:** [June 17, 2010, 10:10pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/8 "2010-06-17T22:10:49Z")
plugged converters ? ---
**Author:** ![ignoramus9](https://avatars.discourse-cdn.com/v4/letter/i/d07c76/32.png) [@ignoramus9](https://community.cartalk.com/u/ignoramus9)\ **Post date:** [June 17, 2010, 10:12pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/9 "2010-06-17T22:12:46Z")
sounds an awful lot like a vacume leak someplace to me. ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 18, 2010, 12:38pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/10 "2010-06-18T12:38:12Z")
thats what i was thinking ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 18, 2010, 12:38pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/11 "2010-06-18T12:38:32Z")
no their new also ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 18, 2010, 12:39pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/12 "2010-06-18T12:39:03Z")
i am going to ask them to check for leaks today ---
**Author:** ![jccrumpler](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jccrumpler](https://community.cartalk.com/u/jccrumpler)\ **Post date:** [June 18, 2010, 12:40pm UTC](https://community.cartalk.com/t/lack-of-power-on-replaced-engine/50458/13 "2010-06-18T12:40:08Z")
they are telling me that i just have to run it for a while and to use engine cleaner to clean out the engine of old gas, are they right?