View Full Version : drop in performance

07-22-2003, 01:04 AM
well i have 230k on my car and im noticing a slight drop in performance. i can definately tell because my friend in his 328 raced me today and he was slightly faster, where as before i was (his is a stock 328 and i have a slightly modified 325) anyways, what kinda things should i check for in regards to performance (im gonna get a leak down test done soon)

07-22-2003, 04:53 AM
..stock 328 is faster than a slightly mod 325.. i think

07-22-2003, 10:57 AM
not mine. the only major difference which usually made us even was the heavier rims and the sound system

07-22-2003, 03:03 PM
try so use carbon-fiber for the possible upcoming mods, it's strong as hell and really light...

07-22-2003, 04:55 PM
the leak down test will tell you alot
let us know how it goes.

what mods have u done.

07-22-2003, 07:10 PM
Originally posted by stefan325i
the leak down test will tell you alot
let us know how it goes.

what mods have u done.
ill let ya know soon. as for performance mods. right now just a CAI and a chip. the car was really peepy for a 325 when i bought it. (more so compared to others that i drove when i was searching for a car 2 years ago)

07-22-2003, 10:09 PM
where are you getting this done and how much will it cost you?

07-22-2003, 10:27 PM
Originally posted by DbIiRrTdY
where are you getting this done and how much will it cost you?

gonna do it myself. i help out a BMW specialist shop and they'll let me do it. (with the aid of a factory trainned tech beside me)

07-23-2003, 09:16 PM
whats a leak down test?

07-24-2003, 03:17 AM
basically the same as a compression test

07-24-2003, 07:49 PM
Clean your air filter, change your plugs, change your oil and other fluids, install a new fuel filter, and possibly change your injectors.

I also recommend after checking all of that to reset the ECU by disconnecting the battery for 30mins and reconnecting it. It did wonders for my coupe when it was hesitating a lot.

I bet it's just the air filter or something minor.

07-25-2003, 12:34 PM
thanks djcontra im gonna check those today, i have a feeling its my air filter, i blew my radiator a while back and im betting the air filter is clogged a bit, oil is this weekend oddly enough

07-25-2003, 01:11 PM
While you're under the hood, take out the spark plugs and make sure they're not covered in oil or gummed up (common issue on the e36 I've found. It's a gasket problem)

07-25-2003, 05:47 PM
actually i changed the plugs last month, there was a sl;ight bit of oil (very slight) on plug 5, all others were bone dry.

07-26-2003, 04:35 AM
Hey furious!...Let me know what u change, test, and do to help out you car, cause i got a 94 35is, and got high miles too (185k), and i would liek too boost my erfomrmance as well( i have no mods on my car)

07-26-2003, 10:50 AM
I almost forgot, a dirty or bad oxygen sensor can cause a drop in performance as well.
Let's just hope it's NOT that because those are about $250 to replace :(