p1136 cel, suggestions?

**blmlozz** · 08-13-2008 09:09 PM

*** update @ post #5

I upgraded my fuel pump to a walbrough in prep for a 28rs and I did this knowing people had issues pumping fuel when the tank was 1/4 or less, I throw a cel (p1136) now when it's around this level or less and it eventualy goes away after I re-fill.. or at least that's what I'm thinking, this is the secound time it's come up within this past week and that's just my guess of what it is since all the vac lines are new and I'm not pulling any less vacuum than before. i'm just a little worried since I dont remember it happening before (but mabye I've just never let it get this low) I didn't think it would happen on the stock turbo with just a chip, and I spent some extra cash and bought it with a drop-in alum housing from atp so I figured maybe it wouldn't have the same issues.

so my question is;

is this a documented problem with this fuel pump? or could this be something else?

if it matters at all.. It could just be me and my butt dyno but the car has always seemed to pull harder after filling up with an empty tank, despite having the extra weight.

im probaly 90% sure this is the problem, just looking for some verification.

**mike-2ptzero** · 08-13-2008 10:51 PM

I never had this problem while using a Walbro. You sure the problem isn't with your fuel level sensor and when you get to 1/4 tank the ecu thinks your on empty?

Is the pump in your tank that moves fuel from one side of the tank to the other working?

**blmlozz** · 08-14-2008 11:41 AM

the fuel gauge is a bit flakey I'll gain about 1/8th a tank every so often. don't know of that's normal or not. how do you go about testing the in tank pump?

**VTECCURED** · 08-14-2008 03:30 PM

He's probably right.. it could be your fuel level sensor binding...

when i installed my pump... i also had a problem with binding...
i just made sure all the wiring and tubing is away from the float so it would cause any misread level.

double check your connections as well... make sure its nice and tight.

JOHN

**blmlozz** · 08-14-2008 08:04 PM

the code came up again in the vag-com without throwing a cel with a full tank of gas. I cleared it this morning and drove 370 miles from NJ to back home, at 3/8 I filled the car up and scanned again when I got back home to find it again.. ideas?
mods to the car:
GIAC chip, godspeed FMIC kit turbo back exhaust..the walbrough 255lph pump of course..
if it matters, it boosts to 15psi, spikes to about 17 and pulls about 25hg at idle.

most things on the car are orginial as far as I know, so we're talking possibly 108,000miles on the O2 sensors.. I run some copper 7 series NGKs and I think it has been a while since I replaced them, but not horribly long, <10,000 miles..stock coil packs probaly..

the entire log file is as follows
1 Fault Found:

17544 - Fuel Trim: Bank 1 (Add): System too Lean

P1136 - 35-10 - - - Intermittent

**mike-2ptzero** · 08-14-2008 08:14 PM

Code p1136 - Long Term Fuel Trim Add.Fuel,Bank1 System too Lean?

Might want to look at changing the fuel filter if you haven't already. The 02 sensor and maf could also be causing the lean issue.

What does your block 032 readings look like?

**blmlozz** · 08-14-2008 09:18 PM

Originally Posted by mike-2ptzero

Code p1136 - Long Term Fuel Trim Add.Fuel,Bank1 System too Lean?

Might want to look at changing the fuel filter if you haven't already. The 02 sensor and maf could also be causing the lean issue.

What does your block 032 readings look like?

fuel filter has <10K on it, was replaced when the new pump went it should it be done again? I *was* messing around with the Maf sensor element when I was trying to talk to 034 for a 3" housing but I was carefull not to acutally touch it, I'll re-check in the morning and go get some fresh scope readings for you.

**blmlozz** · 08-15-2008 10:07 AM

nominal values when standing still and rev to 6K
11.7% and -5.5%

nominal values when making a short trip to autocrack
7.8-10.4% and -3.9-4.7%

the values for the first figure slowly creep up from 7.8 and end with 10.4.

**mike-2ptzero** · 08-15-2008 10:44 AM

Originally Posted by blmlozz

nominal values when standing still and rev to 6K
11.7% and -5.5%

nominal values when making a short trip to autocrack
7.8-10.4% and -3.9-4.7%

the values for the first figure slowly creep up from 7.8 and end with 10.4.

Idle trim is way to far on the + side. Sounds like a leak somewhere after the turbo or a maf that is reading way to low at idle.

Does your maf have a flow straightner on the front of it?

**blmlozz** · 08-15-2008 10:50 AM

Originally Posted by mike-2ptzero

Idle trim is way to far on the + side. Sounds like a leak somewhere after the turbo or a maf that is reading way to low at idle.

Does your maf have a flow straightner on the front of it?

no, but it is a bit ghetto rigged, I couldn't find a 2.75" inlet filter and so I'm using a 3" off the shelf k&n with some foam weather striping material as a filler. I'll check it.

**mike-2ptzero** · 08-15-2008 11:08 AM

Originally Posted by blmlozz

no, but it is a bit ghetto rigged, I couldn't find a 2.75" inlet filter and so I'm using a 3" off the shelf k&n with some foam weather striping material as a filler. I'll check it.

What tune are you using and is that the stock maf housing your using?

Cant find a 2.75" inlet cone filter?

Take your pick

RU-5090 2.75 in (70 mm) 3.75 in (95 mm) 4 in (102 mm) 5.563 in (141 mm) Rubber 0.813 in (21 mm) 0 degrees 0 in (0 mm)
RU-3120 2.75 in (70 mm) 4 in (102 mm) 2 in (51 mm) 6 in (152 mm) Rubber 1 in (25 mm) 10 degrees 0 in (0 mm)
RU-3590 2.75 in (70 mm) 4 in (102 mm) 2 in (51 mm) 7 in (178 mm) Rubber 1 in (25 mm) 10 degrees 0 in (0 mm)
SN-2590 2.75 in (70 mm) 4 in (102 mm) 3 in (76 mm) 5 in (127 mm) Rubber 1 in (25 mm) 10 degrees 0 in (0 mm)
SN-2600 2.75 in (70 mm) 4 in (102 mm) 3 in (76 mm) 6 in (152 mm) Rubber 1 in (25 mm) 10 degrees 0 in (0 mm)
SN-2620 2.75 in (70 mm) 4 in (102 mm) 3 in (76 mm) 6 in (152 mm) Rubber 2 in (51 mm) 20 degrees 0 in (0 mm)
SN-2580 2.75 in (70 mm) 4.5 in (114 mm) 3 in (76 mm) 4 in (102 mm) Rubber 0.625 in (16 mm) 0 degrees 0 in (0 mm)
RC-9350 2.75 in (70 mm) 4.688 in (119 mm) 3.5 in (89 mm) 4.875 in (124 mm) Metal 0.813 in (21 mm) 0 degrees 0 in (0 mm)
RC-9310 2.75 in (70 mm) 4.75 in (121 mm) 3.5 in (89 mm) 5.875 in (149 mm) Metal 0.813 in (21 mm) 0 degrees 0 in (0 mm)
RC-5144 2.75 in (70 mm) 4.75 in (121 mm) 4 in (102 mm) 7.875 in (200 mm) Metal 0.813 in (21 mm) 0 degrees 0 in (0 mm)
RC-4490 2.75 in (70 mm) 5.188 in (132 mm) 3.5 in (89 mm) 4.313 in (110 mm) Metal 0.75 in (19 mm) 0 degrees 0.5 in (13 mm)
RC-4500 2.75 in (70 mm) 5.188 in (132 mm) 3.5 in (89 mm) 5.125 in (130 mm) Metal 0.75 in (19 mm) 0 degrees 0.688 in (17 mm)
RC-8410 2.75 in (70 mm) 5.25 in (133 mm) 3.5 in (89 mm) 4.344 in (110 mm) Metal 0.75 in (19 mm) 0 degrees 0.469 in (12 mm)
RC-4790 2.75 in (70 mm) 5.5 in (140 mm) 4.5 in (114 mm) 7 in (178 mm) Metal 2.5 in (64 mm) 30 degrees 0 in (0 mm)
RC-9940 2.75 in (70 mm) 5.781 in (147 mm) 3.5 in (89 mm) 4.531 in (115 mm) Metal 0.75 in (19 mm) 0 degrees 0 in (0 mm)
RU-3390 2.75 in (70 mm) 5.875 in (149 mm) 4.75 in (121 mm) 2.625 in (67 mm) Rubber 0.75 in (19 mm) 0 degrees 0 in (0 mm)
RU-4450 2.75 in (70 mm) 5.875 in (149 mm) 4.75 in (121 mm) 5 in (127 mm) Rubber 0.75 in (19 mm) 0 degrees 0 in (0 mm)
RU-3610 2.75 in (70 mm) 5.875 in (149 mm) 4.75 in (121 mm) 7 in (178 mm) Rubber 0.75 in (19 mm) 0 degrees 0 in (0 mm)
RU-4960 2.75 in (70 mm) 6 in (152 mm) 5 in (127 mm) 5.5 in (140 mm) Rubber 2 in (51 mm) 0 degrees 0 in (0 mm)
RX-4960 2.75 in (70 mm) 6 in (152 mm) 5 in (127 mm) 5.5 in (140 mm) X-Stream 2 in (51 mm) 0 degrees 0 in (0 mm)
RX-4870 2.75 in (70 mm) 6 in (152 mm) 5 in (127 mm) 6.5 in (165 mm) X-Stream 2 in (51 mm) 0 degrees 0 in (0 mm)
RU-4870 2.75 in (70 mm) 6 in (152 mm) 5 in (127 mm) 6.5 in (165 mm) Rubber 2 in (51 mm) 0 degrees 0 in (0 mm)
RC-4850 2.75 in (70 mm) 6.75 in (171 mm) 5.875 in (149 mm) 3.25 in (83 mm) Metal 0.75 in (19 mm) 0 degrees 0 in (0 mm)
E-2232 2.75 in (70 mm) 6.75 in (171 mm) 5.875 in (149 mm) 3.25 in (83 mm) Metal 0.75 in (19 mm) 0 degrees 0 in (0 mm)

Any of those are just a click order away from either K&N directly or from AJusa.com

**blmlozz** · 08-15-2008 08:31 PM

im on the verge of switching to a 3" intake system so there's no reason to spend $50 at this point. It's just a simple k03 giac tune, and yes its the stock housing, I'll try to find something more solid for a spacer however. I re-applied some more of the striping and it seemed to pull a bit harder to me at least.

**blmlozz** · 08-17-2008 05:45 PM

after fixing the filter and changing the plugs, 032 block readings are back under 5-8%, I cleared the code and after about 50miles it hasent come back, thanks for the help mike!

**milehighpilot** · 08-21-2008 01:25 AM

sorry i didnt read this earlier, it was probably your plugs i was doing the same thing, even close to the same values. i haven't had the issue in 700 miles now.

however do you still have the issue with the fuel tank? does yours also randomly go way up and change according to how you are driving on the highway after 1/4 of a tank used?