please look at my logs Why is my car so laggy

Riceball777 · 10-20-2015, 06:07 AM

I am new to bmw's but new to cars. I have a 620whp s2000 and i do and always do all the work on all my own cars.

I bought a bone stock 2007 335i with 92,000 miles about 2 months ago. I changed all the plugs and coils and did a walnut blasting on it. I installed a jb4, vrsf down pipes, charge pipe and 7 inch intercooler as well as a tial bov. i just realized my car is very laggy. I run 20-30%e85 and i dont hit 10 psi will about 3500rpm and 15psi at about 4000rpm. The car is fast but spools very slow. are my turbos busted. Even when stock the power band felt the same just with a lot less top end power. I just learned how to log and here is my first log.

I set the default wastgate position on the jb4 at 1.5 any higher they will rattle like crazy. Bone stock the car did not rattle. I highly doubt there are any boost leaks. even if i set the DWP at max i dont feel like the lag is much better.

Antetokounmpo · 10-20-2015, 08:20 AM

Need the .csv file. Are there any codes?

335NJ · 10-20-2015, 08:39 AM

Have you replaced your vacuum lines? Specifically the ones from the solenoids to the turbos?

10-20-2015, 09:01 AM

At that mileage your solenoids are probably tired. Swap those and all vacuum lines and try again.

csu87 · 10-20-2015, 10:07 AM

upload to datazap. Makes it easier to see whats going on.

Riceball777 · 10-20-2015, 02:33 PM

Quote:

Originally Posted by proTUNING Freaks

We've seen this countless times. In a lot of cases its been boost control solenoids. Add PWM to this graph to see how your duty cycle to the wastegates is doing.

is the PWM the wastegate duty cycle? It reads 100 from 1200 rpm to 3000rpm and i'm getiing almost no boost.

Like i said i'm 90% sure there is no boost leak because when the car was stock it felt the same way except for a lot less top end power. And i just upgraded the intercooler and the charge pipe so i'm sure i tightened all of the couplers. I'm guessing vacuum leak, bad boost solenoids or bad turbos? but is it possible the turbos are bad even though i hit 15 psi at about 4,200 and the car feels fast.

Milan · 10-20-2015, 05:50 PM

Had that problem it was my VANOS solenoids.

Get rid of the JB4 and switch to MHD

pobudz · 10-20-2015, 06:39 PM

Quote:

Originally Posted by Riceball777

is the PWM the wastegate duty cycle? It reads 100 from 1200 rpm to 3000rpm and i'm getiing almost no boost.

Like i said i'm 90% sure there is no boost leak because when the car was stock it felt the same way except for a lot less top end power. And i just upgraded the intercooler and the charge pipe so i'm sure i tightened all of the couplers. I'm guessing vacuum leak, bad boost solenoids or bad turbos? but is it possible the turbos are bad even though i hit 15 psi at about 4,200 and the car feels fast.

Fucking screenshots of a csv file? really?

http://datazap.me

tc535i · 10-20-2015, 06:39 PM

already figured it out on the other board

you need to zero out your AFRs

10-20-2015, 06:07 AM	#1
Riceball777 Lieutenant 166 Rep 466 Posts Drives: S2000 618whp/ e90 335i Join Date: Jul 2012 Location: Los Angeles iTrader: (0)	please look at my logs Why is my car so laggy I am new to bmw's but new to cars. I have a 620whp s2000 and i do and always do all the work on all my own cars. I bought a bone stock 2007 335i with 92,000 miles about 2 months ago. I changed all the plugs and coils and did a walnut blasting on it. I installed a jb4, vrsf down pipes, charge pipe and 7 inch intercooler as well as a tial bov. i just realized my car is very laggy. I run 20-30%e85 and i dont hit 10 psi will about 3500rpm and 15psi at about 4000rpm. The car is fast but spools very slow. are my turbos busted. Even when stock the power band felt the same just with a lot less top end power. I just learned how to log and here is my first log. I set the default wastgate position on the jb4 at 1.5 any higher they will rattle like crazy. Bone stock the car did not rattle. I highly doubt there are any boost leaks. even if i set the DWP at max i dont feel like the lag is much better. __________________ 2007 e90 335i pure stage 2 DD turbos, rb inlets Last edited by Riceball777; 10-20-2015 at 02:27 PM..
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10-20-2015, 08:20 AM	#2
Antetokounmpo Brigadier General 1560 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	Need the .csv file. Are there any codes?
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10-20-2015, 08:39 AM	#3
335NJ Colonel 535 Rep 2,872 Posts Drives: 2008 335i 6MT E90 Join Date: Feb 2014 Location: NJ/Philadelphia Suburbs iTrader: (1)	Have you replaced your vacuum lines? Specifically the ones from the solenoids to the turbos?
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10-20-2015, 09:01 AM	#4
FCobra94 Guest 0 Rep n/a Posts Drives:	At that mileage your solenoids are probably tired. Swap those and all vacuum lines and try again.
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10-20-2015, 10:07 AM	#5
csu87 Banned 2130 Rep 3,553 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	upload to datazap. Makes it easier to see whats going on.
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10-20-2015, 05:50 PM	#7
Milan Captain 202 Rep 663 Posts Drives: F80 M3 Join Date: May 2014 Location: Boise, ID iTrader: (7)	Had that problem it was my VANOS solenoids. Get rid of the JB4 and switch to MHD __________________ 17 M3 Comp
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10-20-2015, 06:39 PM	#9
tc535i Lieutenant Colonel 222 Rep 1,818 Posts Drives: 2007 335i, 2001 330i, 1995 M3 Join Date: Sep 2013 Location: West Los Angeles iTrader: (1)	already figured it out on the other board you need to zero out your AFRs
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