Help! Truck is lean

N

NPperformance

New member
My Sy has a brand new motor,head work, custom cam, atr headers,T-44 turbo(boost set a 12lbs), 3"dp and exhaust and WG, stall speed, aux cooler,walbro pump,ATR strip chip all new sensors. The truck only ran a 13.40 so I put it on a scanner today. I dont know what to do to fix it. Please help!!!!
This is what my scanner said:
rpm-4700
02(mV)505
Integratr-151
clsd loop
Exhaust oxygen-Lean
block learn-127
Blm cell-0
A/F ratio-13.0
A/F learned-No
Asynch PW(mS)-0.3
Base PW(mS)12.0
TPS(V)-4.47
throttle(%)-100
IAC-38
Prom id-831
coolant-161
map-28.9
map(v)-4.63
Vac("Hg)-6.3
vac-.57
Baro("Hg)-29.7
Baro-4.77
Boost("Hg)-27.1
Des Boost-0.0
Wastegate-75%
Airflow(gm/sec)-16
MAT(F)-99
Spark ADV-17*
knock retard-3*
ESC-Yes
EGR sol-off
EGR duty cycle-0
Veh speed(Mph)-59


<font size=-1>[ This Message was edited by: NPperformance on 2002-03-19 01:03 ]</font>
 
S

smeagol

Active member
Yipes.

You have a motor that has higher flowing heads, a cam (probably the Compucam 2020 from ATR0, a bigger turbo, headers etc etc... and I'm guessing you are running stock injectors, or ATR sold you 33's, possibly with a 7th injector.. ??

Anyways, you have provided us with a snapshot, of one instant of truck run time. Kind of useless. The data is misleading, as it reads an A/F ratio, which I'm not sure where that is from, reads that it is also in closed loop (NO)... well whatever.

Anyways, you need to think about first supporting that high HP motor with some fuel, then engine management. No ATR chip will work well with that combination, I don't care what propaganda they sell ya.

Your options are, as I see them:
a- Chip from me for cam/heads 50# injectors
b- Custom chip from someone (Digger is probably the only chip for hire guy)
c- Aftermarket ECU like FAST (Speedpro)

Costs? Most expensive to least, c,b,a
Best performance? Best to worst c,b,a
 
R

Richme

New member
On 2002-03-19 10:09, NPperformance wrote:
Thanks for the input. Can anyone else give me alttle more advice.
Click to expand...
Hmmm, ain't gonna get much better than BG's response.

Regards,
 
N

NPperformance

New member
I really only ment I was looking for something more specific. What size inj, what should my fp be, and is my fuel pump big enough, where should I get the chip,inj,afpr, And after these mods will my ET drop significantly
 
bdubb

bdubb

I am teh kingpin!
you would want a good fuel system. i'd say 50# injectors, and warlboro 255 high pressure pump.

Mike Lee can get you want you want, http://arautosports.com

also, adding mods simply wont make you faster. your truck has to be tuned with the new mods you put on. but adding those and a good chip will really help with your goals.
 
N

NPperformance

New member
Also my tps signal is 4.47 which from what I've been told is fine. If thats the case why is is still in closed loop why not open loop. Could there be something wrong w/the ecm or is it the chip, or have I just been misinformed. Also wityh the inj,and chip what should my fp be
 
bdubb

bdubb

I am teh kingpin!
its hard to tell from what info you have gave us.

its like saying, how loud should brian green burb in my ear?
 
bdubb

bdubb

I am teh kingpin!
yeah. but its going to be a pain in the ass. which verison of DFI, if its not the newest one i wouldnt use it.

_________________
bdubb
depp3.jpg

Not that we needed all this for the trip, but once you get locked in a serious drug collection, the tendency is to push it as far as you can.

<font size=-1>[ This Message was edited by: Dr Gonzo on 2002-03-19 12:01 ]</font>
 
N

NPperformance

New member
I'd assume it is the mnewest one I plan on buying it brand new. I plan on having Job Spetter of Turbo People in hastings NY tune it for me.
 
mrweelr

mrweelr

New member
Man, your 02(mV) are way too low at WOT. If you keep driving it this way, you'll probably ruin the engine. I'd say address your fuel system ASAP. Do you have an in-cab fuel pressure gauge? Are you getting 60 p.s.i. or higher FP at WOT? What's your base FP set at? Better to run rich than lean, especially with a big boost turbo motor. Datamaster files are good too if you have a laptop. The software can be downloaded for free but you'll need to buy the cable for $100. In any case, you should pinpoint the source of the problem before throwing parts at it. Good luck.

Jeremy
GMC Syclone #434
Yamaha R1 #1525

<font size=-1>[ This Message was edited by: mrweelr on 2002-03-19 14:01 ]</font>
 
S

smeagol

Active member
I can understand your frustration, but you have a truck that is hardly stock anymore, yet you want stock reliability out of it?

DFI, you'd want version 7.0, NOT the old version, and go with something larger than 40lb/hr if you do it. Job knows his stuff.

The snapshot you took looks like from a Snap on or Tech II scan tool. Usually the open/closed loop flags are incorrect; I can practically guarantee you were in open loop. Errors like this are another reason I don't like those scan tools, they can't compare with Diacom or Datamaster.


The biggest problem, on paper, is that your fuel system will not support your modifications. If the one millisecond snapshot you took is any indication of the fueling, (and I am guessing it is lean in boost), you are lean and need the fuel, as in a good fuel pump and larger injectors.

Are you on a budget? What are you goals with the truck? You have access to a scan tool, yet don't seem to fully grasp the tuning concepts...
 
N

NPperformance

New member
My frustration originated because the the cunt at ATR who has been lying to me from the beginning. I'm not worried about stock reliability, I just want the truck to perform the way it should It was suppose to do low 12 or high 11 before the the motor and only did a 13.19. After hours and hours on the phone with ATR I decided to redo the motor and change all the sensors and nopw this happens. It ran a 13.50 so I put it on a snap on scanner and ended up in this perdicament. I really would perfer not to spend the money for a DFI but if there is no other alternative then thats what I will do. But if the ultimate w/ a 3 bar and 50# inj. I'd like to do that.
 
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