[timsintim]

Hi to anyone reading, need some help or advice on my E93 335is. Running MHD Stage1+

I am experiencing some serious lag and/or power loss, I used MHD to dlog and I'm hitting nothing more than 2.3psi on WOT, target boost is about 16.5psi.

I did a boost leak test and didn't come across anything, car sounds fine, drives fine but when I put my foot down, it's not punchy at all.

I have wastegate noises, I feel maybe one is stuck open or closed.. something!!

Anyone help?! Scanned the car, nothing comes up but 30ff - dme turbocharger, charge-air pressure too low.

[E92_35IS]

Originally Posted by timsintim

Hi to anyone reading, need some help or advice on my E93 335is. Running MHD Stage1+

I am experiencing some serious lag and/or power loss, I used MHD to dlog and I'm hitting nothing more than 2.3psi on WOT, target boost is about 16.5psi.

I did a boost leak test and didn't come across anything, car sounds fine, drives fine but when I put my foot down, it's not punchy at all.

I have wastegate noises, I feel maybe one is stuck open or closed.. something!!

Anyone help?! Scanned the car, nothing comes up but 30ff - dme turbocharger, charge-air pressure too low.

Ok a few things here, E93 is a M3 not the 335is, that's the E92. It goes e90=4 door sedan, e91= "5" door station wagon, e92= 2 door coupe, e93= m3. I have a 335is as well, Just dont want you going around with the incorrect information. Second, you have the N54 engine which is famous for 30FF on stock turbos while running MHD. The factory turbo wastegates fail with higher than factory boost. If you hear the wastegate noise then it's most likely too late an you need new turbos. MHD has a "fix" which adjusts the way the dme controls them. I would try the wastegate rattle fix and adjust it accordingly. If the MHD fix doesn't work then you definitely need new turbos.

[timsintim]

Originally Posted by E92_35IS

Ok a few things here, E93 is a M3 not the 335is, that's the E92. It goes e90=4 door sedan, e91= "5" door station wagon, e92= 2 door coupe, e93= m3. I have a 335is as well, Just dont want you going around with the incorrect information. Second, you have the N54 engine which is famous for 30FF on stock turbos while running MHD. The factory turbo wastegates fail with higher than factory boost. If you hear the wastegate noise then it's most likely too late an you need new turbos. MHD has a "fix" which adjusts the way the dme controls them. I would try the wastegate rattle fix and adjust it accordingly. If the MHD fix doesn't work then you definitely need new turbos.

Thanks for the response, I think you need some more research on the BMW models, E92 is a coupe, E90 is the 4dr, E91 is the touring/wagon and E93 is the convertible.
The 335is' come in the E92 and E93.still hi

I'll have my turbos checked regardless, i did the wastegate rattle fix on mhd but still hitting 2psi on wot, probably a bad boost solenoid my guess after all the checks.

[E92_35IS]

Originally Posted by timsintim

Thanks for the response, I think you need some more research on the BMW models, E92 is a coupe, E90 is the 4dr, E91 is the touring/wagon and E93 is the convertible.
The 335is' come in the E92 and E93.still hi

I'll have my turbos checked regardless, i did the wastegate rattle fix on mhd but still hitting 2psi on wot, probably a bad boost solenoid my guess after all the checks.

My b the only one I did get incorrect was the e93 convertible my fault. I honestly forget about the convertible because I would never be caught in one since I'm not gay or a female, so they just slip my mind.🤷‍♂️... p.s the solenoids are a possibility but rarely fail. If you hear the wastegates it's the turbos

[timsintim]

Originally Posted by E92_35IS

My b the only one I did get incorrect was the e93 convertible my fault. I honestly forget about the convertible because I would never be caught in one since I'm not gay or a female, so they just slip my mind.🤷‍♂️... p.s the solenoids are a possibility but rarely fail. If you hear the wastegates it's the turbos

Well seen as I have one of 2 335is' in my country (Ghana) I'll take that convertible.

Thanks anyway!

[BozoBlaster]

I was getting wastegate rattle real bad a while back and I wasn't able to make boost until about 3.5k rpms which is insane for twins. Super embarrassing as well to say the least, you either need to pull your turbos and repair the wastgates with this kit which requires a grinder to cut out old flappers and a welder to tack in new ones. Here is a link to a kit on ecstuning.
https://www.ecstuning.com/b-vargas-t...t-n54-wf2~vtt/
There are other options but this is just for reference, if going that route it would be worth considering replacing the cores as well, at that point they would be near new turbos. Or new turbos, both are about the same amount of work having to remove and reinstall turbos which usually means dropping the subfram for ease of access. But new turbos are going to be way more $$, just depends on how many miles you have on those twins to determine if its worth it. My twins had 105k miles on them so I decided to replace and I ended up going single turbo since I wanted to go that route at some point anyway so I figured to only do the job once. No more boost problems anymore! Hope this helps.

[lookalikehuuh]

Originally Posted by E92_35IS

My b the only one I did get incorrect was the e93 convertible my fault. I honestly forget about the convertible because I would never be caught in one since I'm not gay or a female, so they just slip my mind.🤷‍♂️... p.s the solenoids are a possibility but rarely fail. If you hear the wastegates it's the turbos

Awww someone got his panties in a wad because he was proven to be an idiot.

For the record the having a convertible in no way means someone is a homosexual or a woman. I just means they prefer the wind in their hair and sunshine over outright performance and body rigidity.

Anyway, you are also incorrect about the failure rates of the solenoids, they do fail on a regular basis. I myself have replaced both of mine 2x due to low boost caused by internal failures of the solenoids. That being said he does say he has wastegate rattle, but he can probably make some adjustments to the wastegate rods and improve the boost and wastegate rattle.

[Brandoch]

Originally Posted by E92_35IS

My b the only one I did get incorrect was the e93 convertible my fault. I honestly forget about the convertible because I would never be caught in one since I'm not gay or a female, so they just slip my mind.🤷‍♂️... p.s the solenoids are a possibility but rarely fail. If you hear the wastegates it's the turbos

You must be from Virginia. I guess you know what they say.... lol

[GoRomeo]

I own a sedan and a convertible, Whats does make me half gay?? 😂😂 So freaking funny.

Ok, back on topic. I do have some rattle too and ocasional 30ff code. I have 115k miles on stock turbos and still runs great I so Iam debating of going with new turbos or do the washer fix for front turbo and rear rod adjustment to see if helps for now. 🤔

[timsintim]

Originally Posted by BozoBlaster

I was getting wastegate rattle real bad a while back and I wasn't able to make boost until about 3.5k rpms which is insane for twins. Super embarrassing as well to say the least, you either need to pull your turbos and repair the wastgates with this kit which requires a grinder to cut out old flappers and a welder to tack in new ones. Here is a link to a kit on ecstuning.
https://www.ecstuning.com/b-vargas-t...t-n54-wf2~vtt/
There are other options but this is just for reference, if going that route it would be worth considering replacing the cores as well, at that point they would be near new turbos. Or new turbos, both are about the same amount of work having to remove and reinstall turbos which usually means dropping the subfram for ease of access. But new turbos are going to be way more $$, just depends on how many miles you have on those twins to determine if its worth it. My twins had 105k miles on them so I decided to replace and I ended up going single turbo since I wanted to go that route at some point anyway so I figured to only do the job once. No more boost problems anymore! Hope this helps.

This was thorough, thanks! Been thinking about going single turbo as well, but later on in the year, it's very pricey but looks like its worth it, especially with the dct.
On this side of the world, I would be almost the first to do it but with no expertise around with install it makes me think upgraded twins could be the best route. Torn between the two

[timsintim]

Originally Posted by GoRomeo

I own a sedan and a convertible, Whats does make me half gay?? 😂😂 So freaking funny.

Ok, back on topic. I do have some rattle too and ocasional 30ff code. I have 115k miles on stock turbos and still runs great I so Iam debating of going with new turbos or do the washer fix for front turbo and rear rod adjustment to see if helps for now. 🤔

I don't know why but i feel working on the old turbos would still bring the problem back, better getting new ones.. would you go single turbo or upgraded twins if you're to change turbos.

[GoRomeo]

Originally Posted by timsintim

I don't know why but i feel working on the old turbos would still bring the problem back, better getting new ones.. would you go single turbo or upgraded twins if you're to change turbos.

Yeah this washer fix is only a temporary fix I would imagine. If I decide to replace the turbos will mostly upgrade them.

[whyzee125]

Originally Posted by E92_35IS

My b the only one I did get incorrect was the e93 convertible my fault. I honestly forget about the convertible because I would never be caught in one since I'm not gay or a female, so they just slip my mind.🤷‍♂️... p.s the solenoids are a possibility but rarely fail. If you hear the wastegates it's the turbos

.

[timsintim]

Sorted the issue out, seemed to be one boost solenoid but i had my mechanic
"service" the turbo and resolve the wastegate rattle.
Car drives like butter! hitting 16.4 psi with 16.5psi as boost target.

Now I have a misfire on cylinder 6 when Im flat out lol, maybe coils or spark plugs?...

[lookalikehuuh]

Originally Posted by timsintim

Sorted the issue out, seemed to be one boost solenoid but i had my mechanic
"service" the turbo and resolve the wastegate rattle.
Car drives like butter! hitting 16.4 psi with 16.5psi as boost target.

Now I have a misfire on cylinder 6 when Im flat out lol, maybe coils or spark plugs?...

If you haven't done coils/plugs recently its a good idea to replace them every 15-20K minimum when tuned. I would strongly recommend you go with the OE Bosch plugs and NOT the 1 or 2 step colder NGK while you have factory turbos. I would also recommend the Eldor coils over the other brands that are compatible with your car.

FCP Euro will sell you both with a lifetime warranty (which is what I do) that way its a pay once cry once kind of thing and future replacements are really minimal cost to you.

[GoRomeo]

Originally Posted by timsintim

Sorted the issue out, seemed to be one boost solenoid but i had my mechanic
"service" the turbo and resolve the wastegate rattle.
Car drives like butter! hitting 16.4 psi with 16.5psi as boost target.

Now I have a misfire on cylinder 6 when Im flat out lol, maybe coils or spark plugs?...

Nice, Im courius what your mechanic did to resolve the wastegate rattle and did he do it on both turbos?

[timsintim]

Originally Posted by GoRomeo

Nice, Im courius what your mechanic did to resolve the wastegate rattle and did he do it on both turbos?

According to him, on both turbos the wastegate shaft was stuck so to free it, he used penetrating oil, left it over night, next day he toggled with it and it came loose, did his pressure checks on both turbos and they're good now. Might not be using the right terms but that's as far as he goes, hope it helps

[timsintim]

Originally Posted by lookalikehuuh

If you haven't done coils/plugs recently its a good idea to replace them every 15-20K minimum when tuned. I would strongly recommend you go with the OE Bosch plugs and NOT the 1 or 2 step colder NGK while you have factory turbos. I would also recommend the Eldor coils over the other brands that are compatible with your car.

FCP Euro will sell you both with a lifetime warranty (which is what I do) that way its a pay once cry once kind of thing and future replacements are really minimal cost to you.

I usually change my plugs and use those from the N55, apparently they're a step colder. I might just revert to the stock plugs.

why not go a step or 2 colder though, according to a lot of guys it helps...

[whyzee125]

Everyone thinks "it helps" but they don't know why. What does it help? Colder plugs are a compromise that's necessary when pushing tons of boost and higher combustion temps at the expense of more fouling, rougher cold starts, and a shorter lifespan but it doesn't "help" with anything. Bosch OE plugs are the best for your situation.