Whodat

1) What are the symptoms are of a Crankshaft Position Sensor going bad?

2) What are the symptoms of a Mass Air Flow thingy going bad?

Thanks in advance....

reitmeid

From what I remember reading on this forum, failed CP sensor results in a no-start condition. Sometimes the car will start if allowed to sit for an hour.
After my MAF finally through codes and I replaced it, I noticed improved acceleration and especially much crisper shifting.

StapleGun

Pretty much this is correct, the codes on mine were P0170 and P0173 - fuel trim, left and right banks, respectively. It ran a whole lot better afterwards is all I can say. Forgot to add, typically, from what I have seen on this forum...the MAF will illuminate your CEL (Check Engine Light), it did on mine.

My understanding is that yes, if your crank position sensor goes - you're done. I pre-emptively replaced the CPS. Figured with the mileage my car had, it would be a wise idea. They're cheap anyways....both are extremely easy DIY projects. Feel free to contact me with your questions. You'll need the standard e-torx tools for this job. If I remember correctly, you won't even need a tool to remove the MAF.

bs00clk

Failing MAF won't necessarily throw codes...a tech can see whether it's performing in the "optimal" range or not and as people have indicated sometimes you just know based on performance, or lack thereof.

Whodat

Man, you guys are great is all I got to say. OK, that confirms what I've been experiencing for the CPS. I'm VERY new to this (only 1 month old now) so I'm nervous about performing repairs. I pick it up from the shop for the CPS in about an hour. They recommended MAFS change but I elected not to for now. I'll get it when I get back from the Caribbean. I MAY be willing to give it a try if you guys talk me into it

cnolen1

Does anyone know what the best ecu replacement is and where i can purchase it, and where in the car is it located also would love to install a supercharger does one exist any input would be appreciated thanks.

CLK430girl

They are great, aren't they!

blackbenzz

Supercharger ey? haha. Get ready to shell out big $$$. Kleemann, renntech, HPS, and HOP are the companies that come to mind when I think s/c. There are many ECU tuning places out there, seems like Powerchip has alot of good reviews but they are pricey. If you want cheaper alternative there are many other ECU tuning companies.

blackbenzz

If you ever want to change your MAF let me know and I'll do it for you in 5 minutes since you are local.

Whodat

5 minutes?!?!?!?! Are you SERIOUS!? You DA MAN!

Biz told me the MAF runs around 3 bills ($300) and they'd do it for $560. I thought that was high. By the way, the CPS bill was originally $367 but I complained about the labor estimate (from that stupid labor cost estimate book) @ 3 hours was ridiculous. I'd already heard that the thing only takes about an hour to change out, if that. They knocked off an hour of so they charged me for 2 hours labor, which I know is still questionable. But again, I'm new to this and thanks to this board, Ima be gettin up to speed REAL quick. Again, THANKS!

Whodat

Maybe I should have said you guys AND LADIES? Sorry, I was unaware that beautiful women were scanning the globe (MB World)! Are you in the DC area as well?

CLK430girl

Yep, I'm in Silver Spring....I've been busy w/ work and I just finished with finals, so I'll be joining the guys in Rockville on the weekends....now, "Bullet"--my car---isn't fancy, but she still gets a lot of attention -- The work you guys put into your vehs makes a girl blush!!!

blackbenzz

Finally! j/k I dont think Im gonna be there tomorrow night cuz my graduation ceremony is during the day and I'll probably be hangin with friends at night. I might roll through.

Whodat

How could I not say:
CONGRATULATIONS ON GRADUATION!!!!

Whodat

Are you sure it's your wheels thats getting the attention?
Well, I just got my sled so I'm with you. Nothing fancy but, I like it stock myself. I do admire what the fellas (and ladies!) do to their jonts. Even my mechanic said BlkBenzz's sled is off tha heezy! Maybe we need to divide the Rockville meets into 'Supermods', 'Mods', and 'Stock'!

CLK430girl

Add a second CONGRATS!!! Now, go and make me proud!!! ha,ha..or at least that's what my parents told me!!!

CLK430girl

Well, it could be the endless supply of stiletto heels---you guys spend extra money on your ride, I spend it on shoes Dress and impress...ha,ha.... I'm with you on the division of the Rockville meets..I'm straight stock!! Ahmad is in a class of his own...

blackbenzz

Thanks for the congrats! Hope to see some new faces at the meets. Anybody going to NOPI at Budds Creek aka MIR on Sunday? Remembe I was also stock at one point. I have a whole bunch of **** sitting in my basement waiting to be put on (new body kit, brembo gran turismo BBK, and Im about to order a klemann s/c ). Thanks for the compliments on the car but it really doesnt have much done to it. Im probably gonna sell it soon. If we divided people up it wouldnt be much fun now would it?

Whodat

Just curious...have you changed out your radio or are you still pumpin the OEM deal? I'm not really happy with it (apparently not alone in this assessment) and really can't stand that CD changer in the trunk. Do you know of any REAL GOOD stereo shops in our area?
CLK430girl: feel free to chime in...

clkal

i don't know if the 2 original questions were answered, but I can tell you what I experienced about 2 weeks ago when my MAF went bad.....

I was driving on a local road going about 40 MPH, when I slowed down due to a red light, my car just lost power and died. I had to put it in Park, and restart it. EVERY time I would come to a halt either at a stop sign or red light, the car would just die.

I replaced the MAF at my mechanic's shop for $378 out the door, installed, and haven't had any more problems.

There were 2 codes they pulled from their scanner, however, from his experience, he told me that he was 99% sure that once we replaced the MAF, that would take care of the other code as well....which it did =)

CLK430girl

And here I was thinking that I was alone!! I can't stand that BS in the trunk..but I wasn't exactly sure what my "best" options were that wouldn't cause me troubles down the road and I wouldn't have to sell my right arm for...I don't know of any, but anyone that does----feel free to share...

Whodat

Well, get at me if you hear of ANYBODY that does BOMB work. I'll wait to hear from Blkbenzz to see who he knows. Don't want any ole jang-a-lang workin on my sled's sound system....
We all know that the thing interfaces with the steering wheel controls (which I really don't care about. I can reach 12-18 inches to adjust a dam volume control) but I don't want the thing to look like a little sister's of the poor installation jobbie.

Whodat

Thanks man. It seems to me that the symptoms of the CPS and the MAF are very similar. My CPS has been swapped out but not the MAF (yet). I've not had any problems with it since the CPS change. But riding along and having your wheels conk out on you (in a Benz no less!) ain't kewl AT ALL. It happened to me and it seemed people wanted to thumb they're collective noses at me. Blkbenzz is going to help me do the MAF when I obtain one. He says it only takes 5-10 minutes. Do you know if this requires a computer 'reset'?

CLK430girl

Whodat, this was the funniest ish I heard all day!!!!! This almost made me cry, b/c I was thinking of Bernie Mac saying it in the movie Life---"The name's Jang-a-lang....Jang-a-lang!" LMAO

Whodat

Ah, an astute movie watcher I see! That's EXACTLY where that came from...*harhar*

I use it all the time to describe bozos that claim they know what they're doing but, well, you know the results! Then you take it back to them and they act like they didn't mess anything up. I had my cousin's husband put my mom's stereo in (a Chrysler Cirrus). He volunteered to do it. Of course the thing completely drained the battery in like 2 weeks because he hooked it up to a constant power source so essentially, the radio was 'on' ALL THE TIME. Idiot...he installs windshields for a living too. Think I'd get him to do mine? Uh, NO!
Keep smilin!