Sluggish Acceleration when Cold - 986 Forum - The Community for Porsche Boxster & Cayman Owners

CJ_Boxster · 04-07-2008, 01:06 PM

Hey Fella's and Fellet's

Ok after recieving my Boxster from the bodyshop, I immediatly noticed that the acceleration was lacking BIG TIME. So i figure since it wasnt drivin in 1 month I filled the tank up with gas and drove it abit and that seemed to clear up the low-mid RPM lack in power... However, the High RPMs (5k & Up) power curve seems to flat line.

Usually when that happens, I clean the MAF and problem solved but this time it didnt work, I also cleaned the airfilter and no change.

Yesterday morning I did notice that when the engine is cold, the mid-high rpm acceleration is non-existant until the engine warms up for about 30 seconds later, then the low - mid RPM power is there again... but still no power past 5k RPM's.

Anyone have any insite with this issue?

1997 2.5ltr 5-speed manual trans.

Gary in BR · 04-07-2008, 03:18 PM

Man, that sucks.

I dont know the answer but I wanted to bump

you so people can help.

CJ_Boxster · 04-07-2008, 03:30 PM

Thanks Gary.

turbo23dog · 04-07-2008, 04:12 PM

Whenever I have these types of issues, I try fuel additives.

A magic mix that seems to work for me is a bottle of Techron Fuel System Cleaner and a bottle of Heet (gas drier) at the same time into a full tank of gas.

YMMV.

CJ_Boxster · 04-07-2008, 04:27 PM

I might try the Heet stuff cause i know it rained afew days while they had the boxster AND when i picked it up it was running below Empty so my first thought was trash/debris or moister/water jamming the fuel filter.

dcporsche99 · 04-07-2008, 04:55 PM

Hey CJ,

...why was your car at the bodyshop?? I guess I missed that thread. Glad to hear you have 'er back.

IMHO, from what you described with the gas gauge having been below "EMPTY"....I'm thinking possibly fuel filter also. I take it you didn't get a CEL?? Or any new sounds??? Hmmm???

Hopefully, that's all it is.

(RE: Regarding poor power,..... I recently have an issue with a misfire on one of my cylinders that gave me a ticking sound (re: sticky lifter), poor power on the low end and a CEL ...I'm currently awaiting the parts for my home fix).

But, I will have to defer to the more experienced wrenches online regarding your issue...

Keep us posted!