Got New MAF and CEL still on and rough when cold?!

[Tony Mah]

Hello,

My CEL has been on for about 3 months, my 99 c230k started and drove normally but was a bit sluggish on the acceleration. I got my brakes done recently and was told the MAF was going. I purchase a new MAF from ebay, installed it, unplugged my battery and the CEL went off and and the power came back in my car. After 2 days something strange is happening:

1. the CEL came back on but the engine runs fine
2. after the car is left out in the garage over night, it will start fine and when I drive out the rpm needle will start jumping from 1.6k to 2k and the car will start jerking until it warms up for about 2-3 minutes, then it became normal.
3. Now even after work driving out of the parkage the car will jerk for a few minutes.

I am wondering if I should put the old MAF back in and give up the extra power as at least the car didn't have to warm up. Any ideas?

Tony

[stox]

Here's a silly idea, get the code pulled to see why the CEL is on? It will probably give you a pretty good idea what the problem is.

[therock2689]

During the 60 sec warm up, the car tends to drive rough, y i dont know. Teh warm up will happen if you drive for about 4 hrs. for teh CEL, go to you local autopart and they will scan it for you, give you the code and then you find out what it means, simple.


Rock

[Polestar]

was told the MAF was going.

Only symptom was sluggish performance?
If your MAF has deteriorated to the point of needing replacement, you'll prob. get a CEL, otherwise I'd clean it first.

Sure, put the old one back in and see what happens. Maybe the one you purchased on Ebay is defective?

Good luck.

[Proven Guilty]

there is the possibility your replacement MAF is defective. i've had my fair share of lemon replacement parts, even bosch and other brand names from a dealership directly (crank position sensor).

i would check for codes. depending on your mileage your symptoms could include the oxygen sensor, and/or test probe. i just ordered both for my car and they came yesterday afternoon so i'll be installing them today for my code P0410.

hope that helps