So I just hit 100k miles, and I havent driven it routinely for 6 months or so, and I've noticed the car's acceleration is very sluggish! Any suggestions? I put in new NGK spark plugs the other day with no difference. I bought some seafoam and will try that, but i'm not sure what else to do-i suspected a clogged fuel filter, but from others' posts it seems like that should never be a problem. Please any suggestions?

 

disconnect battery for 10 mins and let reset then go 4 a spirited drive.
maybe right after u seafoam it u shud feeeeell the diff.

 

using 91/93 octane gas? hows the air filter look like? do the seafoam treatment, gas tank and vac line.

 

check your IMRC valve and do what pois said, but leave it unconnected for 1-2 hours. After the spirited drive, park it and drive it the next day. You should feel a slight shidder in idle, thats normal, but then you will feel that start to go away and the car will feel REAL fast. Hope it works for you!

 

Thanks for the help, and I always use 93 octane.- disconnecting the battery, is that going to reset the ECU?

 

yeah, it will reset the ECU. you will need to have the radio and/or DVD nav codes available. Sometimes the ECU can go into limp mode...

 

Well, its a good thing that I dont have the factory radio in!!

 

what makes the ECU go into 'limp mode?'

 

take out the 7.5 amp fuse in the fuse box inside the engine bay by the passenger side firewall. this will instantly reset everything related to the ecu..

I disconnected the battery for a day on my CL and it didn't get rid of my CEL so i do NOT trust this method... DO NOT TRUST.

REMOVE 7.5 amp fuse for 10-15, then put it back in and go for a rip!!!!

I would do seafoam prior to this as u will get a CEL (misfire code) and pulling the 7.5 amp fuse DELETES this instantly.

when sea foaming use the hose connected to the throttle body!! plug the hose on one end... attach a longer hose to it and then slowly suck up 1/3 of a can of sea foam up (you will likely have to feather the throttle cable to keep the engine revs up so it doesn't DIE) my car was SO hard to keep from dying FYI. so just be warned

try it out and let us know wtf is up

 

HOLY SHIT! This did the trick, instantly! This method is as good as SEX!

 

if the manifold top plate and the holes that go into the runners are cloged up with carbon it will run sluggish.

 

 

i know this thread is kinda old but i was wondering is my car running sluggish or is it something else?

i would step on the gas going about 35-40mph then let go the car will seem like a down shift feeling.. is this how it feels when it runs sluggish or is sluggish only on accelerate? and it does seems slow on accelerate too...

 

[QUOTE=CL-S progression 01;11578908]take out the 7.5 amp fuse in the fuse box inside the engine bay by the passenger side firewall. this will instantly reset everything related to the ecu..

I disconnected the battery for a day on my CL and it didn't get rid of my CEL so i do NOT trust this method... DO NOT TRUST.

REMOVE 7.5 amp fuse for 10-15, then put it back in and go for a rip!!!!

I would do seafoam prior to this as u will get a CEL (misfire code) and pulling the 7.5 amp fuse DELETES this instantly.

when sea foaming use the hose connected to the throttle body!! plug the hose on one end... attach a longer hose to it and then slowly suck up 1/3 of a can of sea foam up (you will likely have to feather the throttle cable to keep the engine revs up so it doesn't DIE) my car was SO hard to keep from dying FYI. so just be warned

try it out and let us know wtf is up[/QUOTE

I tried following this advice, but there is no 7.5 amp fuse in the engine bay. So for anyone wanting to reset ECU w/o disconnecting battery the fuse is in the passenger side dash. It is a 15 amp fuse marked '13' and labeled 'backup'.

 

[QUOTE=monkeybutt;11782417]Well I checked my fuses under the hood and there is a 7.5 fuse and its also listed in the owners manual and I followed your advice and it worked for me also.