PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

I got it on video

Thread Tools
 
Search this Thread
 
Old Dec 30, 2007 | 09:33 PM
  #21  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

PM the user Zombie on here and see how close to you he is in NV... You need to get a real person in front of that H/C setup; not mail order correspondence. Seriously, all of this is just burning up time I'm sorry to say. He can look with the scanner and see what is going on as well.
Reply
Old Dec 30, 2007 | 09:56 PM
  #22  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Originally Posted by Frost
PM the user Zombie on here and see how close to you he is in NV... You need to get a real person in front of that H/C setup; not mail order correspondence. Seriously, all of this is just burning up time I'm sorry to say. He can look with the scanner and see what is going on as well.
He's in Vegas which is about 450 miles away.
Reply
Old Dec 31, 2007 | 06:59 AM
  #23  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

Well it sounds crappy but you can post all day and never find the problem. You either need your own scanning and tuning software or you need to get to someone that has some. That's really the bottom line. I rec you buy it yourself and post logs here for initial help. PS, HPT and a WB are much less than a grand and you get free real time tuning with your stock PCM witht he credits included. Good stuff.
Reply
Old Dec 31, 2007 | 08:11 AM
  #24  
DaddySS's Avatar
TECH Addict
 
Joined: Dec 2001
Posts: 2,907
Likes: 1
From: Bergen County, NJ
Default

Depressing the clutch disables the throttle cracker and follower. It would sure be helpful to see a log of what's going on.
Reply
Old Dec 31, 2007 | 08:46 AM
  #25  
1Hotbird's Avatar
TECH Apprentice
iTrader: (5)
 
Joined: Jan 2005
Posts: 383
Likes: 0
Default

Give Jeremy at MPH Motorsports a call 1-800-364-1975
They hooked my up with EFI Live, a LC1 wideband with gauge, for about $700-$800 Best money I spent so far!!

Compaired to heads and cams this it cheap!! Just my 0.02
Reply
Old Dec 31, 2007 | 12:32 PM
  #26  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Yeah I need to get some tuning software no doubt. I sure wish I hadn't wasted my money on a Predator now. As I recall it was about $300...a few hundred more and I could have bought real software. Oh well, I bought it a few years ago so it's all part of the learning process.

Well it's running fine now and I'll start saving some $$ for EFI Live and a wideband. I think we'll get a wideband first as my brother is building an old school motor and we can use it to jet his carb.
Reply
Old Dec 31, 2007 | 12:54 PM
  #27  
1Hotbird's Avatar
TECH Apprentice
iTrader: (5)
 
Joined: Jan 2005
Posts: 383
Likes: 0
Default

Originally Posted by ssheets
Yeah I need to get some tuning software no doubt. I sure wish I hadn't wasted my money on a Predator now. As I recall it was about $300...a few hundred more and I could have bought real software. Oh well, I bought it a few years ago so it's all part of the learning process.

Well it's running fine now and I'll start saving some $$ for EFI Live and a wideband. I think we'll get a wideband first as my brother is building an old school motor and we can use it to jet his carb.
MPH will prabably give you a better deal if you buy them together but I know how the wallet can dictate what you buy!! Good luck!!!
Reply
Old Dec 31, 2007 | 02:49 PM
  #28  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Originally Posted by 1Hotbird
MPH will prabably give you a better deal if you buy them together but I know how the wallet can dictate what you buy!! Good luck!!!
Yeah...damn wallet. My brother may buy a wideband setup for my shop, then I can look at tuning software.

I'd love to have the software to play with this. I don't know exactly what the issue is, but I love this kind of stuff. I work on elecrtrical controls for a living and love challenges. I think Jesse did a great job and now I really don't know if I have an input problem, but I don't know what inputs could be causing this. I've swapped the O2s and the TPS reads 0% during a high idle event. I don't see the IAC being at fualt for such an intermitant event either.
I like the idea of tryign to swap the tune to another PCM as it could perhaps be an issue with the PCM that rears its head when the temps go up? I'll call Jesse and see what he thinks?

Man I want tuning software!!!
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Dec 31, 2007 | 04:07 PM
  #29  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Talked to Jesse and went over the details. He still thinks I have a vacuum leak somewhere which is logic I can't argue with. Most importantly, he told me I can buy the EFI scan tool for $250 and it is upgradeble to EFI live. Now that's some great news...where's those kid's damned piggybanks??

I'm going to try and run with the IAC unplugged and see if the problem stays away?

In the meantime, the dog and I are going to go for drive (in the truck) and take a few guns to go shoot the crap out of stuff...that always makes me feel better.
Reply
Old Dec 31, 2007 | 04:50 PM
  #30  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

it's gonna run without airflow metering control if you unhook the IAC; this will not fix a problem.
Reply
Old Dec 31, 2007 | 05:03 PM
  #31  
1Hotbird's Avatar
TECH Apprentice
iTrader: (5)
 
Joined: Jan 2005
Posts: 383
Likes: 0
Default

Originally Posted by Frost
it's gonna run without airflow metering control if you unhook the IAC; this will not fix a problem.
I think he wants to see if the IAC is causing the high RPM idle Problem?
Not the best way to figure it out, Dude get some software!!! Atleast a scanner to get you started!!
Reply
Old Dec 31, 2007 | 05:16 PM
  #32  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

Yeah but if it's opened up when he pulls it, it's gonna stay open and the idle will go high; this isn't really any kind of test
Reply
Old Dec 31, 2007 | 07:09 PM
  #33  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Originally Posted by Frost
Yeah but if it's opened up when he pulls it, it's gonna stay open and the idle will go high; this isn't really any kind of test
Yes, merely a process of elimination. I'm going to get the scan tool ASAP.

Jesse has a good point on the vacuum leak with respect to thermal changes. It was damn cold the last this happened so it could be a material contracting and allowing air in? Or, it may be a fault with the harware like a bad IC or solder joint in the PCM. I can't think of anything else...

Last edited by ssheets; Dec 31, 2007 at 07:14 PM.
Reply
Old Dec 31, 2007 | 07:35 PM
  #34  
Frost's Avatar
FormerVendor
iTrader: (45)
 
Joined: Jul 2005
Posts: 5,913
Likes: 2
From: Richmond VA
Default

...or the fact that the base airflow table is totally temperature dependent and it can easily be off in one cell for one temp and on in another...
Reply
Old Dec 31, 2007 | 07:40 PM
  #35  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Originally Posted by Frost
...or the fact that the base airflow table is totally temperature dependent and it can easily be off in one cell for one temp and on in another...
or that
Reply
Old Dec 31, 2007 | 07:46 PM
  #36  
fuseone's Avatar
TECH Fanatic
 
Joined: Jan 2006
Posts: 1,050
Likes: 0
From: reading,pa
Default

what about a bad tps? did you like back probe it and see what its doing?
Reply
Old Jan 1, 2008 | 12:43 AM
  #37  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Originally Posted by fuseone
what about a bad tps? did you like back probe it and see what its doing?
I watched it on my Predator while the car was acting up and it showed 0% when my foot was off the gas and the car was idling away at 3,000rpm. I did inspect it and clean it with electrical clean for good measure, but I with consistent readings that mimic throttle position I doubt it's the culprit?
Reply
Old Jan 1, 2008 | 01:35 AM
  #38  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

Just got home from family night at the movies so I snuck the SS out for a test drive. It runs perfect!!! It's 17*F outside which is just about what it was the last time I had problems. The car feels real strong and idles great. I'll try taking it out again tomorrow if I get a chance. I need to take the dog out again though first as he's in training for bird hunting.
Reply
Old Jan 1, 2008 | 02:22 AM
  #39  
ssheets's Avatar
Thread Starter
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2003
Posts: 1,037
Likes: 0
From: Gardnerville, NV.
Default

How good is this?
I know I can't tune with it, but will it give me the visibility I need to look at my engine parameters and then work with a tuner to improve it? I believe this is upgradeable to the full tuning version.
Also, how much can I find out without adding a wideband input to it? I'll get one, but not right away.
Reply
Old Jan 1, 2008 | 11:52 AM
  #40  
1Hotbird's Avatar
TECH Apprentice
iTrader: (5)
 
Joined: Jan 2005
Posts: 383
Likes: 0
Default

Originally Posted by ssheets
How good is this?
I know I can't tune with it, but will it give me the visibility I need to look at my engine parameters and then work with a tuner to improve it? I believe this is upgradeable to the full tuning version.
Also, how much can I find out without adding a wideband input to it? I'll get one, but not right away.
That will definatly help you hunt down the problem!! You can watch your Iac counts, your Iac flow tps voltage, and about 200 other perameters. Not sure but you might be able to pull your tune and look at it with the free trial of EFI Live tuning. You wont be able to change it but at least you can see it.
Can anyone verify that you can pull and look over your tune with just the scanner and the free trial of EFI Live???
Reply



All times are GMT -5. The time now is 05:59 AM.

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