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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > lag in power when shifting 1 to 2 gear after installing after market parts



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      01-18-2020, 03:25 PM   #23
JM98
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Quote:
Originally Posted by Makoa6 View Post
https://datazap.me/u/makoa6/2007-335...og=0&data=3-21
Here is my pulls.
I turned off DTC and cleared codes,did a catalog and car seem way better without the power lag!!
https://datazap.me/u/makoa6/2007-335...og=1&data=3-21

Actually looks pretty decent (some minor timing corrections). Looks like you were just experiencing the traction control kick in.

Your low pressure fuel pump is struggling to keep up (under 50psi) even on just pump gas though. If you're considering trying more aggressive maps or an ethanol mix you may want to consider swapping it out.
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      01-21-2020, 05:59 PM   #24
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Quote:
Originally Posted by JM98 View Post
Actually looks pretty decent (some minor timing corrections). Looks like you were just experiencing the traction control kick in.

Your low pressure fuel pump is struggling to keep up (under 50psi) even on just pump gas though. If you're considering trying more aggressive maps or an ethanol mix you may want to consider swapping it out.
Thank you for replying. I was trying to search and see what is the normal psi for low pressure fuel pump? when you say struggling, is it due to the tune or the pump on its way out? should i drop down to stage 1+? I still have stock spark plugs, i read that people change there plugs one stage colder? whats your thoughts on this?
thanks again for helping.
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      01-21-2020, 06:24 PM   #25
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You want you lpfp to stay atleast in the mid 50's during boost, shouldn't drop below 50. 60's and higher is a better number
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      01-21-2020, 08:10 PM   #26
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Quote:
Originally Posted by IllSic_Design View Post
You want you lpfp to stay atleast in the mid 50's during boost, shouldn't drop below 50. 60's and higher is a better number
so, given my readings, looks like mines is a little low. the question i asked, was, is this due to a tune or is this due to lpfp going bad?

im trying to figure out if i need to look into a lpfp or change tune?

thanks for responding
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      01-21-2020, 08:17 PM   #27
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It's due to an old and aging fuel pump. I mean it might not fail if you turned the tune down but given you're not even running any ethanol and it's pretty low I'd say you should get a new or upgraded one.
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      01-22-2020, 03:59 PM   #28
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Quote:
Originally Posted by IllSic_Design View Post
It's due to an old and aging fuel pump. I mean it might not fail if you turned the tune down but given you're not even running any ethanol and it's pretty low I'd say you should get a new or upgraded one.
what LPFP would you suggest? is there any good aftermarket ones? here is a stock one.
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      01-22-2020, 04:29 PM   #29
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I don't know about aftermarket OE ones, but there are plenty of upgraded pumps out there though.

There stage 2 and stage 3 setups that use Walbro pumps.

I run a stage 2 Fuel-It setup because I also run an ethanol blend. If you're not planning to run ethanol or a lot of HP a stock pump would be fine.
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      01-22-2020, 06:22 PM   #30
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Ive had a Fuel it Stage 2 (bucketed) for 3 years now and its run perfect. Excellent customer service from them also, I had a question on a Saturday about an adapter size and they answered the phone immediately.

If you are gonna replace the pump, might as well upgrade it so you can run an ethanol mix down the road.
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      01-22-2020, 08:02 PM   #31
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Quote:
Originally Posted by JM98 View Post
Ive had a Fuel it Stage 2 (bucketed) for 3 years now and its run perfect. Excellent customer service from them also, I had a question on a Saturday about an adapter size and they answered the phone immediately.

If you are gonna replace the pump, might as well upgrade it so you can run an ethanol mix down the road.
how much did you buy the fuel it stage 2 pump? whats the difference between a bucketed and bucketless? there also is a stage 2 DIY? where did you purchase yours from?
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      01-22-2020, 08:52 PM   #32
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Quote:
Originally Posted by Makoa6 View Post
Quote:
Originally Posted by JM98 View Post
Ive had a Fuel it Stage 2 (bucketed) for 3 years now and its run perfect. Excellent customer service from them also, I had a question on a Saturday about an adapter size and they answered the phone immediately.

If you are gonna replace the pump, might as well upgrade it so you can run an ethanol mix down the road.
how much did you buy the fuel it stage 2 pump? whats the difference between a bucketed and bucketless? there also is a stage 2 DIY? where did you purchase yours from?
It's an easy DYI. Buy a Walbro 450 and a Black Market Parts walbro fuel pump fitting and save yourself a chunk of money.
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      01-23-2020, 11:55 AM   #33
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Quote:
Originally Posted by Rule1977 View Post
It's an easy DYI. Buy a Walbro 450 and a Black Market Parts walbro fuel pump fitting and save yourself a chunk of money.
do you have a part number for these items? where can i buy them from? I was searching online but not sure as to which one you got etc... a link or site name would be helpful. thank you in advance.
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