Make a donation

Author Topic: Having lean idle bank 1 problems  (Read 2384 times)

Offline Bainsy edition 30

  • Taking part
  • ***
  • Thank You
  • -Given: 0
  • -Receive: 2
  • Posts: 35
    • Email
Having lean idle bank 1 problems
« on: February 19, 2013, 09:37:48 am »
Hi I'm having lean idle bank 1 issues putting mil on.

Changed.fuel pump cam follower.
Fuel filter.
New O2 sensor.
Smoke tested no leaks.
Getting high fuel trims.could it be down to new neuspeed intake I fitted.

Offline E30Dom

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 42
  • -Receive: 76
  • Posts: 2100
Re: Having lean idle bank 1 problems
« Reply #1 on: February 19, 2013, 09:45:28 am »
Guessing you're stage 1 and just put a CAI filter on... sounds like you HPFP is struggling to meet the extra fueling needed for the extra air...
Diesel Daily Hack.

Offline Bainsy edition 30

  • Taking part
  • ***
  • Thank You
  • -Given: 0
  • -Receive: 2
  • Posts: 35
    • Email
Re: Having lean idle bank 1 problems
« Reply #2 on: February 19, 2013, 11:49:43 am »
I'm stage two mate.with full turbo miltek and neuspeed plus uprated oem diverter valve.had problem after fitting exhaust and intake but before remap.

Offline ROH ECHT

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 113
  • -Receive: 149
  • Posts: 2116
  • K04 PLAY....ZOOM DIS!
Re: Having lean idle bank 1 problems
« Reply #3 on: February 19, 2013, 03:03:07 pm »
Look for looseness in the new intake clamps first. Then check the mass air flow sensor. Find someone not experiencing the issue that will let you try theirs briefly. That will show whether or not to replace it.
If that's not it it is likely the pcv and maybe even coils.
« Last Edit: February 19, 2013, 03:10:28 pm by ROH ECHT »
K04 PLAY...K04 turbo/S3 INJ. & FMIC/FORGE FMTC, TB hose, & WG actuator/GIAC's H.O. K04 & DSG TUNES/AWE DV/NEUSPEED P-FLO,TURBO OUTLET & TB pipe/AUTOTECH hpfp/BSH Eng.&Trans Mounts/H&R ARB's/Whiteline Performance springs & W.A.L.K./ECS stage-3 BBK/BILSTEIN B8's...ZOOM'DIS...GIAC K04 tune-2007 Volkswagen GTI: 12.823 @ 112.050 MPH__Voting for my Dragtimes link: http://www.dragtimes.com/Volkswagen-GTI-Timeslip-25700.html?r=1

Offline Bainsy edition 30

  • Taking part
  • ***
  • Thank You
  • -Given: 0
  • -Receive: 2
  • Posts: 35
    • Email
Re: Having lean idle bank 1 problems
« Reply #4 on: February 19, 2013, 04:28:09 pm »
Sorry forgot to say iv blocked pcv.and she's had new coils.im getting 254g/s on maf log does this sound right for stage 2.it tends to put mil up when I park car up hot then start up again when hot it's there.hot start

Offline mines a leon

  • Always Involved
  • ****
  • Thank You
  • -Given: 0
  • -Receive: 6
  • Posts: 66
Re: Having lean idle bank 1 problems
« Reply #5 on: February 19, 2013, 04:35:38 pm »
You on Revo??

APR stage 3 Leon! Custom mapped! K04 Powaaahhh

With a willy waving 350bhp!

Offline Bainsy edition 30

  • Taking part
  • ***
  • Thank You
  • -Given: 0
  • -Receive: 2
  • Posts: 35
    • Email
Re: Having lean idle bank 1 problems
« Reply #6 on: February 19, 2013, 06:10:37 pm »
No mate hyperchips

Offline Bainsy edition 30

  • Taking part
  • ***
  • Thank You
  • -Given: 0
  • -Receive: 2
  • Posts: 35
    • Email
Re: Having lean idle bank 1 problems
« Reply #7 on: February 19, 2013, 07:12:01 pm »
Just took maf plug of and run car around town and long turm fuel trim is staying 9.2 with maf on its 24% and over.does that meen my mafs bad.

Offline bacillus

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 4
  • -Receive: 451
  • Posts: 6329
Re: Having lean idle bank 1 problems
« Reply #8 on: February 19, 2013, 07:27:45 pm »
Just took maf plug of and run car around town and long turm fuel trim is staying 9.2 with maf on its 24% and over.does that meen my mafs bad.

Could be but better be sure it's not the map itself causing  these issues...
Without traction power is nothing!

Offline Bainsy edition 30

  • Taking part
  • ***
  • Thank You
  • -Given: 0
  • -Receive: 2
  • Posts: 35
    • Email
Re: Having lean idle bank 1 problems
« Reply #9 on: February 19, 2013, 08:07:55 pm »
It was doing this before I had map on car mate

Offline bacillus

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 4
  • -Receive: 451
  • Posts: 6329
Re: Having lean idle bank 1 problems
« Reply #10 on: February 19, 2013, 10:06:25 pm »
It was doing this before I had map on car mate

I'm just the messenger here but any decent tuner would have sorted your issue before mapping the car.
Without traction power is nothing!

Offline mines a leon

  • Always Involved
  • ****
  • Thank You
  • -Given: 0
  • -Receive: 6
  • Posts: 66
Re: Having lean idle bank 1 problems
« Reply #11 on: February 21, 2013, 11:29:57 am »
Without a doubt, running lean can be fixed by rescaling the MAF to deal with the adapted air flow!

Get yourself a proper tuner! Not just the cheapest!
APR stage 3 Leon! Custom mapped! K04 Powaaahhh

With a willy waving 350bhp!

Offline rich83

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 165
  • -Receive: 802
  • Posts: 13444
    • MK5 Golf GTI
  • My Ride: https://www.mk5golfgti.co.uk/forum/index.php?PHPSESSID=vtn4lqmogsvrnutdvc1f8gdvkg&/topic,19740.0.html
Re: Having lean idle bank 1 problems
« Reply #12 on: February 21, 2013, 11:46:24 am »
Fuel trim should be +-10% from what i remember