PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

having a issue could the tune be it?

Thread Tools
 
Search this Thread
 
Old Sep 25, 2014 | 01:08 PM
  #1  
cordova87's Avatar
Thread Starter
On The Tree
iTrader: (5)
 
Joined: Jun 2010
Posts: 146
Likes: 0
Default having a issue could the tune be it?

Hey fellas so I completed my LS swap on my Foxbody. But i'm having some sort of issue with the car. Havent had time till now. Car starts up fine and drives but at WOT I LOOSE POWER like something is holding it back RPM's go up fine but car just wont grab or pull like it should feel's like it wants to. Any ideas what could be the issue would be helpful. I dont want assume but here's a couple thing I have in mind.

1. Not enought fuel...i still have the stock 4cyl fuel pump with a corvetter FPR
2. maybe i need a tune, PCM was flash a deleted the vats
3. Trans could have a issue, fluid looks good, but ill check it again
4. torque management

Keep in mind that cars drives fine and shift fine had a guy check it with hptuners and said gears went in all fine.

What can be the issue? __________________
Reply
Old Sep 25, 2014 | 01:15 PM
  #2  
thunderstruck507's Avatar
11 Second Club
iTrader: (18)
 
Joined: Mar 2008
Posts: 8,358
Likes: 27
From: Northwest AR
Default

MAF sensor is a common place to start for poor WOT performance.

You can test it by unplugging the MAF and see if it runs any different.
Reply
Old Sep 25, 2014 | 02:56 PM
  #3  
cordova87's Avatar
Thread Starter
On The Tree
iTrader: (5)
 
Joined: Jun 2010
Posts: 146
Likes: 0
Default

thxs ill look into that but dont you think i would be getting code if it were the MAF?
Reply
Old Sep 25, 2014 | 04:49 PM
  #4  
LSX Power Tuning's Avatar
FormerVendor
iTrader: (4)
 
Joined: Mar 2013
Posts: 2,367
Likes: 26
From: Brenham TX
Default

Originally Posted by cordova87
thxs ill look into that but dont you think i would be getting code if it were the MAF?
I have seen 10X more bad mafs with no codes than with codes.
Reply
Old Sep 25, 2014 | 04:52 PM
  #5  
thunderstruck507's Avatar
11 Second Club
iTrader: (18)
 
Joined: Mar 2008
Posts: 8,358
Likes: 27
From: Northwest AR
Default

no, the pcm will often not throw a code unless the maf is completely failed

if the maf is just dirty or reading inaccurately due to poor calibration in the tune then it probably won't throw any codes, just run poorly at WOT because the PCM is relying on if for airflow data and getting highly inaccurate results
Reply




All times are GMT -5. The time now is 03:32 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE