PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Wtf is this??

Thread Tools
 
Search this Thread
 
Old Nov 27, 2012 | 12:30 PM
  #1  
brandon9598's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Dec 2009
Posts: 132
Likes: 0
Default Wtf is this??

Alright on a very serious note - I have a potentially extremely dangerous issue with my car. First off, I have a 99 m6 z28. Your basic exhaust/intake car. Well recently I have discovered an oil leak on the driver side. And also this issue, I can't recall, seems like it didnt start till after my Aeroforce and A/F ratio gauge install. But that could just be me getting paranoid.

Okay, for the issue - First off, when I'm cruising around, if I put the car in neutral to coast around at all, my lights will flicker and dim really badly and RPM's will drop quite a bit.
Secondly, and most scary, my car will DIE when decelerating after applying the brake and clutch pedal. It doesn't really seem to do it at a set speed, but I have almost wrecked several times due to this issue. I have checked my MAF and IAT sensor - neither are dirty and I was told this should be the first area to check. I really need help trying to figure out what the hell this issue is because I really don't feel like totalling my car. Please help!
Reply
Old Nov 27, 2012 | 12:41 PM
  #2  
Undertow74's Avatar
TECH Fanatic
15 Year Member
iTrader: (45)
 
Joined: Oct 2007
Posts: 1,284
Likes: 13
From: South Carolina
Default

check all your grounds, your battery connections, and your alternator output.
Reply
Old Nov 27, 2012 | 12:44 PM
  #3  
brandon9598's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Dec 2009
Posts: 132
Likes: 0
Default

How do I check the alternator output?
Reply
Old Nov 27, 2012 | 12:53 PM
  #4  
Undertow74's Avatar
TECH Fanatic
15 Year Member
iTrader: (45)
 
Joined: Oct 2007
Posts: 1,284
Likes: 13
From: South Carolina
Default

if you don't have a multimeter, you should just be able to swing by napa/autozone and they can test it for you with a VAT. or any shop for that matter. but if you have a multimeter you can put the test lead on the excite wire stud on the alternator and then increase your engine rpms and you should see your voltage climb up to at least 12.5-13 volts
Reply
Old Nov 27, 2012 | 12:57 PM
  #5  
brandon9598's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Dec 2009
Posts: 132
Likes: 0
Default

Oh yeah and I meant to add that ZERO engine codes are showing up! - and this may or may not matter, but I have a capacitor installed for my sound system, and when I first installed it it was holding 13-14 volts and now sometimes it will climb all the way up to like 17 or so.
Reply




All times are GMT -5. The time now is 10:39 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