PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

mail order tune, or something on my end.

Thread Tools
 
Search this Thread
 
Old Nov 28, 2008 | 03:40 PM
  #1  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default mail order tune, or something on my end.

mods;
forged 347
patriot stage 2 heads
F14 cam

mail order tune

symptoms;
fouled the plugs once
lack of throttle response
car is open headers, but it acts like there is no cam
no choppy idle.

attached is an hptuners tune file, and a short scan.
Attached Files
File Type: hpt
MOSLEY'98A4-FMS.hpt (448.7 KB, 66 views)
File Type: hpl
issues.hpl (9.8 KB, 222 views)
File Type: hpl
issues2.hpl (34.8 KB, 54 views)
Reply
Old Nov 28, 2008 | 08:50 PM
  #2  
shoemike's Avatar
TECH Fanatic
15 Year Member
iTrader: (25)
 
Joined: Dec 2005
Posts: 1,283
Likes: 2
From: Prescott, AZ
Default

ask yourself how someone could tune your car without driving or logging data from it.
small changes, emissions, CAGS, speedometer, injectors (for the most part)
and a few other things could be altered without consequence,
but things like spark, fueling, and airflow forget it.
your mods need a lot of attention.
Reply
Old Nov 28, 2008 | 09:00 PM
  #3  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

understandable, this is good news for me. We think its just dumping way too much fuel, but hopefully its understandable of why im asking the question. I dont want to drive 3 hours and it be something thats not in the tune.
Reply
Old Nov 30, 2008 | 03:30 PM
  #4  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

start by putting an exhaust on the car... there is NO WAY that a PCM can operate in closed loop with open headers. Your O2s can't exactly control fueling if you have them hanging out in fresh air.

Last edited by Frost; Nov 30, 2008 at 11:38 PM.
Reply
Old Nov 30, 2008 | 07:08 PM
  #5  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

mocking up exhaust as we speak, understandable. these cars suck for building exhaust LOL
Reply
Old Nov 30, 2008 | 07:46 PM
  #6  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

Originally Posted by chetmo
mocking up exhaust as we speak, understandable. these cars suck for building exhaust LOL
As noted above,you will still need the extra in-person tuning to get it driving and pulling as well as it can, but that mail order tune may work for you much better once the full exhaust is on the car.

Good luck.
Reply
Old Nov 30, 2008 | 09:23 PM
  #7  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

i mean would open headers cause very weak throttle response, and act like it has no cam in it?
Reply
Old Nov 30, 2008 | 10:14 PM
  #8  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default

Originally Posted by chetmo
i mean would open headers cause very weak throttle response, and act like it has no cam in it?
absolutely.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Pouria Savadkouei
story-1

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

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

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

 Pouria Savadkouei
story-5

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

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

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

 Verdad Gallardo
Old Nov 30, 2008 | 10:39 PM
  #9  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

so basically with the 02's being so close to fresh air, Its F'ing everything up, and causing it to dump way too much fuel possibly, therefore causing the weak throttle, etc.
Reply
Old Dec 1, 2008 | 09:01 PM
  #10  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

seems I might have a dead coil pack!
Reply
Old Dec 1, 2008 | 11:31 PM
  #11  
greased05's Avatar
Teching In
 
Joined: Oct 2008
Posts: 12
Likes: 0
Default

Originally Posted by chetmo
so basically with the 02's being so close to fresh air, Its F'ing everything up, and causing it to dump way too much fuel possibly, therefore causing the weak throttle, etc.
yea serious ******* up may have occured w/ all that fresh air wash. your second priority is to fix your tune, once you have exhaust done you will be able to drive in closed loop (part throttle/idle) safely since o2 sensors will trim enough, however if you dont get dyno tuned you may be risking your engine everytime you go WOT
Reply
Old Dec 1, 2008 | 11:42 PM
  #12  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

car has never seen more than 3k-3.5k rpms. we are working on everything at the moment. Thanks for pointing me in the right direction though.
Reply
Old Dec 2, 2008 | 12:45 AM
  #13  
5_02ls1's Avatar
11 Second Club
iTrader: (20)
 
Joined: Oct 2006
Posts: 3,131
Likes: 0
From: Virginia
Default

drove my ca about 2 miles open headers to get the exhaust back on after h/c...it ran like crap...welded the y pipe and catback on it and it ran great actually went from too rich to lean....I ordered hp tuners the following day...
Reply
Old Dec 2, 2008 | 01:03 AM
  #14  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

damn guess i better be careful with cutout placement.
Reply
Old Dec 3, 2008 | 09:06 AM
  #15  
BLKHAWK1's Avatar
Staging Lane
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (30)
 
Joined: Jul 2008
Posts: 87
Likes: 0
From: Port Huron MI
Default

Originally Posted by chetmo
damn guess i better be careful with cutout placement.
at least 18in from the o2's
Reply
Old Dec 3, 2008 | 09:31 AM
  #16  
chetmo's Avatar
Thread Starter
TECH Regular
iTrader: (10)
 
Joined: Oct 2005
Posts: 403
Likes: 0
Default

yep, we are putting it close to the rear, BTW exhaust is on the car and WOW this thing is quiet, runs MUCHO better now as well.
Reply




All times are GMT -5. The time now is 06:10 AM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE