# Troubleshooting help -- Hesitation with Acceleration **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** eldorado, cadillac\ **Created:** [August 8, 2009, 9:05pm UTC](https://community.cartalk.com/t/troubleshooting-help-hesitation-with-acceleration/34714 "2009-08-08T21:05:25Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![oldsfan](https://avatars.discourse-cdn.com/v4/letter/o/e0b2c6/32.png) [@oldsfan](https://community.cartalk.com/u/oldsfan)\ **Post date:** [August 8, 2009, 9:05pm UTC](https://community.cartalk.com/t/troubleshooting-help-hesitation-with-acceleration/34714/1 "2009-08-08T21:05:25Z")
My 90 Caddy (4.5 liter- 98K) has a slight hesitation when I accelerate from a stopped or slower speed. It is most noticeable from a stop and quickly disappears as the car picks up speed – within two or three seconds. I have no codes, and the car has no other symptoms and has been serviced regularly. This hesitation is also accompanied by a slight shake – as though the car is stumbling. Any suggestions on how to troubleshoot? Don’t want to throw money in the wrong direction. Thank you for your help! ---
**Author:** ![OldArmy](https://avatars.discourse-cdn.com/v4/letter/o/c2a13f/32.png) [@OldArmy](https://community.cartalk.com/u/OldArmy)\ **Post date:** [August 8, 2009, 11:55pm UTC](https://community.cartalk.com/t/troubleshooting-help-hesitation-with-acceleration/34714/2 "2009-08-08T23:55:11Z")
There can be a 101 different causes for your hesitation problem. Here are a few that you can start looking for: Possible vacuum leak - look for disconnected or broken vacuum lines Dirty throttle body - spray with throttle body cleaner. Malfunctioning EGR valve - remove, clean and replace gasket Worn ignition wires / plugs / distributer cap - check and replace as needed Low fuel presure - check filter / pressure from pump / fuel pressure regulator Really dirty air filter - remove and replace if necessary Good Luck!