? about stock fuel system

Reply Subscribe

Thread Tools

Search this Thread

Nov 14, 2007 | 12:29 PM

KillerZO6

Thread Starter

On The Tree

iTrader: (-1)

Joined: Nov 2007

Posts: 143

Likes: 0

? about stock fuel system

i was wondering if 98 + f body fuel system under rate the hp if it gets to low on gas. my friend has a t/a that i borrowed last week and it seems like when its under a 1/4 of a tank that it doesn't pull as hard, it wont spin in second and the power takes longer to kick it(it a a4 car) also doesn't accelerate as fast.

Nov 26, 2007 | 10:00 PM

RE AND CHERYL

TECH Fanatic

iTrader: (31)

Joined: Apr 2007

Posts: 1,207

Likes: 0

From: Dover DE

I remember someone else complaining that their car didn't run as well with low fuel, but I don't see why unless it was sucking up air and the fuel pressure was falling off.

Re'

Dec 10, 2007 | 11:23 AM

KillerZO6

Thread Starter

On The Tree

iTrader: (-1)

Joined: Nov 2007

Posts: 143

Likes: 0

so u think it just from losing fuel pressure

Dec 10, 2007 | 09:55 PM

RE AND CHERYL

TECH Fanatic

iTrader: (31)

Joined: Apr 2007

Posts: 1,207

Likes: 0

From: Dover DE

It couldn't be from anything else. The PCM didn't cause it as it dosn't reduce power when the fuel gets low.

Re'

Dec 10, 2007 | 10:01 PM

DuronClocker

11 Second Club

iTrader: (25)

Joined: Nov 2005

Posts: 1,241

Likes: 1

From: Clearwater, FL

I know if you had a wideband on the car, you'd start to go lean as you're low on gas. Lean enough, and you'll start to get knock and timing retard.

Dec 10, 2007 | 10:13 PM

KillerZO6

Thread Starter

On The Tree

iTrader: (-1)

Joined: Nov 2007

Posts: 143

Likes: 0

i have wideband o2 on the front 2 and o2 sims on the back 2

Dec 10, 2007 | 10:55 PM

MeentSS02

Kleeborp the Moderator™

iTrader: (11)

Joined: Mar 2004

Posts: 10,316

Likes: 6

From: Dayton, OH

Quote:

Originally Posted by KillerZO6

i have wideband o2 on the front 2 and o2 sims on the back 2

So you are running open loop? What tuning software was used to do this?

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Pouria Savadkouei

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Verdad Gallardo

7 Most Reliable High-Performance Engines GM Has Ever Built

Verdad Gallardo

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Dec 11, 2007 | 09:57 AM

ChevyChad

8 sec potential, 12 sec slip

iTrader: (50)

Joined: Apr 2002

Posts: 4,092

Likes: 2

From: Savannah, GA

Don't run it less than 1/4 tank then!

Dec 11, 2007 | 10:21 PM

#10

KillerZO6

Thread Starter

On The Tree

iTrader: (-1)

Joined: Nov 2007

Posts: 143

Likes: 0

i never tuned it

Dec 12, 2007 | 09:03 AM

#11

MeentSS02

Kleeborp the Moderator™

iTrader: (11)

Joined: Mar 2004

Posts: 10,316

Likes: 6

From: Dayton, OH

Quote:

Originally Posted by KillerZO6

i never tuned it

Then you don't have wideband O2 sensors in the front sensor locations...they are narrowband. The PCM can't accept anything more than a narrowband O2 sensor...