# Loss of power durring acceleration **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** mystique\ **Created:** [January 14, 2009, 8:22pm UTC](https://community.cartalk.com/t/loss-of-power-durring-acceleration/24925 "2009-01-14T20:22:31Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![kbcarpe](https://avatars.discourse-cdn.com/v4/letter/k/9f8e36/32.png) [@kbcarpe](https://community.cartalk.com/u/kbcarpe)\ **Post date:** [January 14, 2009, 8:22pm UTC](https://community.cartalk.com/t/loss-of-power-durring-acceleration/24925/1 "2009-01-14T20:22:31Z")
95 mercury mystique 2L i had recently posted about a problem that i though was with the CKP after checking the voltage and resistance readings before and after the slpiiced connector i found that be ok, i found a vaccum hose that has been blown off, after reconnectig it the engine no longer stalls out when comming to idle. Cleaned out the IAC and took it for a test drive. there is very low acceleration, sputtering, especially up hill, i replaced the plugs wires and fuel filter about 1300 miles ago after buying the car. not realy sure where to go next. would a diagnostic tool be helpful at all if there is no check engine light on? any information at al on where to go next outside of taking it to someone (which i can not afford) would be helpful, thank you ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [January 14, 2009, 11:59pm UTC](https://community.cartalk.com/t/loss-of-power-durring-acceleration/24925/2 "2009-01-14T23:59:27Z")
Have a shop do a manifold vacuum test,this will confirm or eliminate the possibility of a exaust (or cat) restriction. I you want to do it your self and can get a gague I will re-post instructions (two techniques were posted yesterday) Some how you must get a under load fuel pressure reading to eliminate the potential low fuel pressure possibility. ---
**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\ **Post date:** [January 15, 2009, 3:48am UTC](https://community.cartalk.com/t/loss-of-power-durring-acceleration/24925/3 "2009-01-15T03:48:00Z")
Have you disconnected the battery. If so, how did the engine run right after reconnecting. If that reboot worked for awhile, I might suspect the engine computer. If I wanted to just change parts, and I do usually want to, I would change the throttle position sensor. After that didn’t work I would have to get the codes read. The other way around is better.