# slow acceleration

**URL:** <https://forums.speedlife.net/t/slow-acceleration/83099>\
**Category:** SON240sx Automotive\
**Created:** [January 18, 2005, 1:00pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099 "2005-01-18T13:00:07Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![blu2fourty](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@blu2fourty](https://forums.speedlife.net/u/blu2fourty)\
**Post date:** [January 18, 2005, 1:00pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/1 "2005-01-18T13:00:07Z")

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well i was comparing my rpms to my friends rpms and his arrown goes up faster then mines and his car pulls faster. both stock 240.i checked the sparl plugs on all 4 cyclinders and they all fire but i noticed crap in 2 of my spark plugs like unburnt fuel or some fluid, the other 2 were fine. you think it can be my valves ? or i’m not gettin compression in 2 cyclinders?

jon

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**Author:** ![200sxca18det](https://avatars.discourse-cdn.com/v4/letter/2/49beb7/32.png) [@200sxca18det](https://forums.speedlife.net/u/200sxca18det)\
**Post date:** [January 18, 2005, 1:07pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/2 "2005-01-18T13:07:49Z")

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check CR should be within 15psi of each other

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**Author:** ![200sxca18det](https://avatars.discourse-cdn.com/v4/letter/2/49beb7/32.png) [@200sxca18det](https://forums.speedlife.net/u/200sxca18det)\
**Post date:** [January 18, 2005, 1:18pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/3 "2005-01-18T13:18:43Z")

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check your cr, should be within 15psi of eachother and not too far below stock specs…

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**Author:** ![Axlerod](https://avatars.discourse-cdn.com/v4/letter/a/8edcca/32.png) [@Axlerod](https://forums.speedlife.net/u/Axlerod)\
**Post date:** [January 18, 2005, 1:35pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/4 "2005-01-18T13:35:44Z")

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I know you want to help and all, but I think he heard you the first time, 9 minutes before the second post :lol:

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**Author:** ![blu2fourty](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@blu2fourty](https://forums.speedlife.net/u/blu2fourty)\
**Post date:** [January 18, 2005, 3:15pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/5 "2005-01-18T15:15:59Z")

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wuts cr? compresion ratio? and how do i check that?

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**Author:** ![spd-dmn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spd-dmn/32/5513_2.png) [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)\
**Post date:** [January 18, 2005, 5:37pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/6 "2005-01-18T17:37:14Z")

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You’re supposed to check compression btw. Not CR.

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**Author:** ![NiTeRiDeR](https://avatars.discourse-cdn.com/v4/letter/n/dfb087/32.png) [@NiTeRiDeR](https://forums.speedlife.net/u/NiTeRiDeR)\
**Post date:** [January 18, 2005, 9:19pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/7 "2005-01-18T21:19:16Z")

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Check it with a compression tester from Canadian Tire… if your local and I’m feeling generous I can lend you mine.

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**Author:** ![blu2fourty](https://avatars.discourse-cdn.com/v4/letter/b/9fc348/32.png) [@blu2fourty](https://forums.speedlife.net/u/blu2fourty)\
**Post date:** [January 18, 2005, 10:05pm UTC](https://forums.speedlife.net/t/slow-acceleration/83099/8 "2005-01-18T22:05:53Z")

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i’m in scarborough, i’m a noob so dunno how use the tool thingy. i just know how to read it lol. if u can help me out that would be greatly appriciated.