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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Jul-11-2018, 05:10:54 PM   #11
mrgizmo04
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Default Re: Sluggish Performance at low rpm

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Originally Posted by ebmw21 View Post
My Vanos was well overdue for an overhaul (I was down a good amount of power...will have before and after dynos soon.) and NEVER threw a Vanos code.
Mine was not way overdue, but my seals were flatter than pancakes. Depends on what part of vanos is the culprit, not everything will throw codes.

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Old Wed, Jul-11-2018, 05:43:36 PM   #12
Toxic0n
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Default Re: Sluggish Performance at low rpm

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Originally Posted by ebmw21 View Post
My Vanos was well overdue for an overhaul (I was down a good amount of power...will have before and after dynos soon.) and NEVER threw a Vanos code.
Did it pass the VANOS test in DIS?
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Old Wed, Jul-11-2018, 08:44:58 PM   #13
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Default Re: Sluggish Performance at low rpm

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Originally Posted by mrgizmo04 View Post
Mine was not way overdue, but my seals were flatter than pancakes. Depends on what part of vanos is the culprit, not everything will throw codes.
Completly agree, it was really surprising when i swapped solenoid packs with a friend... the car came alive. This was my main indication that i needed to overhaul the Vanos. I never had a solenoid code.

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Did it pass the VANOS test in DIS?
Yes, it did.
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Old Thu, Jul-12-2018, 12:42:32 AM   #14
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Default Re: Sluggish Performance at low rpm

Hey I have a similar problem on a new owner/used '04 w/87k miles, power under 3K is not great and acceleration seems to be that of a nothing special kind of car. But since I never really had the car new, I have nothing to compare it to as far as how it should be. Gas mileage tops at at the very best at 20 highway. Usually in the 15-17 range in the city.

I had a PPI done and was told the Vanos is good by a reputable shop so I am inclined to believe that is ok. Also new plugs, head gasket, air filter and coil packs were installed at time of purchase. No error codes at all.

Is the MAF sensor fix something that just can be cleaned and its good as new, or is it something that would need to be replaced? And would a dirty to clean one would give a major improvement that is noticeable / be the culprit on its own?

Thanks!
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Old Thu, Jul-12-2018, 01:47:21 AM   #15
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Default Re: Sluggish Performance at low rpm

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Is the MAF sensor fix something that just can be cleaned and its good as new
I've used this for 15 of the 16 years I've owned this car with an oiled filter, the MAF is still the original.

http://www.acehardware.com/product/i...ductId=1451535
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Old Thu, Jul-12-2018, 01:51:38 AM   #16
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Default Re: Sluggish Performance at low rpm

Is that the same thing as the MAF cleaner the same company sells?

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Originally Posted by Jimbo's M View Post
I've used this for 15 of the 16 years I've owned this car with an oiled filter, the MAF is still the original.

http://www.acehardware.com/product/i...ductId=1451535
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Old Thu, Jul-12-2018, 02:54:18 AM   #17
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Default Re: Sluggish Performance at low rpm

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Is that the same thing as the MAF cleaner the same company sells?
I have no idea, nor do I care, simply because this works. Why look elsewhere?
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Old Thu, Jul-12-2018, 03:44:23 AM   #18
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Default Re: Sluggish Performance at low rpm

My E46 M3 runs super sluggish, and rough, at low rpm but only when its COLD outside.

When it's 80+, the car runs like a bat out of hell!

Anyone know why it would be so slow and rough only when cold?
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Old Thu, Jul-12-2018, 04:32:11 AM   #19
mrgizmo04
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Default Re: Sluggish Performance at low rpm

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Originally Posted by dcsax View Post
My E46 M3 runs super sluggish, and rough, at low rpm but only when its COLD outside.

When it's 80+, the car runs like a bat out of hell!

Anyone know why it would be so slow and rough only when cold?
Could be some hose/seal/connection that expands with heat. You smoke the car to see if you have leaks?

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'05 M3 6MT coupe

All DIY: 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, WPC rod bearings, Beyer driveshaft, full SS (SS stepped V1, catted S1, resonated S2, SS sport), Sachs clutch/flywheel, rear main, VANOS bullet proofing with anti-rattle, valve adjustment, cooling refresh, Ohlins R&T/Swift 448f 672r/GC street tops and camber plates, AFD E85 Proflex kit.
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Old Sat, Jul-14-2018, 01:17:29 AM   #20
walid.m3
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Default Re: Sluggish Performance at low rpm

Alright guys time for an update. I went to autozone and advance auto parts to run and see if I have any codes. The result was 0 codes. Great... Yesterday, I didn't notice any stalls when coming to a stop nor power lost I think?

Today, I decided to get the NEW MAF sensor in the car hoping it would resolve the issue. The result was probably no power loss in the lower rpm and no stalls when coming to a stop. The only reason why I believe no power loss is because it was linear power, and I raced my cousins m3 and I pulled on him by half a car length in 3rd gear (I have headers, cousin doesn't).

Anyways, I still have a stall problem in the parking lot. Whenever, I'm pushing the clutch in and out while in reverse and 1st gear. The RPM starts to drop to 500 rpm and stalls. This doesn't happen all the time though maybe 1 in every 8 or 9 times. My cousins drops rpm to 600 rpm but it jumps right back up.

Do you think colder temperatures makes a big difference in sluggish lower rpm and stalls when coming to stop? I read some where that it only happens in colder temperatures. This maybe my case due to this was happening more often in May.

Any Ideas? Clutch possibly?
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Discussing Sluggish Performance at low rpm in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)