I have a 1999 chevy malibu v6 when i start the car it runs fine, when the engine heats up or gets to normal temp, when trying to excearate from a stop or even driving and trying to excelarate it will be laggy kinda bogged down, i have to let off the gas and step on it again too get going, just wondering if u might no what it could be or any ideas, thanks megan

SOURCE: Engine running temp

195 seems to be a good operating temp.

SOURCE: 2002 Impala 3.8l v6 major hesitation

Have someone do a back pressure test on you catalytic converter. I had the same problem and it turned out that my converter was almost completely plugged. I was also getting a check engine light indicating a misfire on cylinder 4. Once the converter was replaced, the problems went away.

SOURCE: How to change a heater core in a 1999 Chevy Malibu?

Before starting this job I would get a repair manual. This is not a easy job, 6+ hours for an experienced tech with all of the right tools. And you may have to discharge and recharge the AC system.

SOURCE: lug pattern for 1999 Chevy Malibu

the lug pattern should be 5x100mm, you having the loaded malibu it could be the 5x125mm. if you still have the factory aluminum wheels on there then you can either take one off and look on the back of the wheel you will have to look closely it will tell you though, or you can go to www. tirerack.com there website will navigate you through and give you the proper size. hope this helps. sorry not more specific.

SOURCE: 1998 chevy malibu dies while driving down road

that would probalbly fuel filter or a blockage in the tank