Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN







NO Power 04 GMC 4.3


  Email This Post



Pokerface77
Novice

Jul 19, 2012, 5:50 PM

Post #1 of 4 (911 views)
Shortcut
NO Power 04 GMC 4.3 Sign In

04 GMC Silverado
4-3 v6 182000

Check engine light on. P0430 below threshold bank 2, P0300 Random/Multiple, P0101 MAF/VAF (latest code to show).

Began with just the P0430. Truck was running fine so I just put it in the back of my mind. After about 2 wks, light went out. Now, complete lack of power, 0-60 about 30 sec. If I force it, it sounds very throaty like it's in the intake shorkel. I'm suspecting clogged cat bank 2 with such a loss of power. Idles just fine.

This thing normally has plenty of power. Can easily tow my 24 travel trailer all day long. Help please.


nickwarner
Veteran / Moderator


Jul 19, 2012, 6:14 PM

Post #2 of 4 (901 views)
Shortcut
Re: NO Power 04 GMC 4.3 [In reply to] Sign In

If you don't have a way to test the exhaust backpressure, hook up a vacuum gauge and run at idle. Now rev to 2500-3000rpm. If vacuum drops near zero it almost certainly points to a bad cat.


Pokerface77
Novice

Jul 19, 2012, 10:20 PM

Post #3 of 4 (865 views)
Shortcut
Re: NO Power 04 GMC 4.3 [In reply to] Sign In

Exactly right. I just had to confirm my suspecions before taking the leap. Checked, then drilled a few relief holes through the innerds of the cat. Power is back. Now to get a cat replaced. Thanks for the confirmation.


nickwarner
Veteran / Moderator


Jul 20, 2012, 8:42 PM

Post #4 of 4 (847 views)
Shortcut
Re: NO Power 04 GMC 4.3 [In reply to] Sign In

Thanks for posting the fix and glad you want to diagnose instead of waste money. We're always here for the next repair.




NO Power 04 GMC 4.3


  Email This Post
 
 






Latest Forum Post
Hi All, I am based out of India and I own a 4 year old Hyundai I20 1.2 litre ...
I may have asked this awhile back . I want to buy a power probe . I work with sc...
Hi i have a nissan frontier 2.4 with noise and the mechanic told me it was the t...
Can anyone help me... I have a suzuki S4 2012 and this light came in the morning...
1997 Geo Metro 1.3 liter 100,000 miles Hello, my 97 geo metro keeps shuttin...
1997 chevy malibu 3.1 with 142,000mi new sparkplugs & wires gapped at 060 an...

Feed Button


Used Car Search
Used Car Price Ranges:
Under $5,000
$20,000
$35,000

$10,000
$25,000
$40,000
$15,000
$30,000
$45,000
Over $45,000
Search used Cars By Manufacturers:
Used Acura
Used Audi
Used BMW
Used Buick
Used Cadillac
Used Chevrolet
Used Chrysler
Used Dodge
Used FIAT
Used Ford
Used GMC

Used Honda
Used Hyundai
Used Infiniti
Used Jaguar
Used Jeep
Used Kia
Used Land Rover
Used Lexus
Used Lincoln
Used Mazda
Used Mercedes-Benz

Used MINI
Used Mitsubishi
Used Nissan
Used Porsche
Used Saab
Used Scion
Used Subaru
Used Suzuki
Used Toyota
Used Volkswagon
Used Volvo
2010 Honda Civic
$15,770
2004 Jeep
$8,991
2012 Mustang
$22,990
1997 Honda Cr-V
$4,490
2010 Toyota Prius
$17,496
2010 BMW 328
$26,980




Automotive Forum Categories
Automotive Repair
Auto Body Repair and Refinishing
AC Auto Repair Help Forum
Automotive Wiring and Electrical

Auto Insurance and Car Financing
Automotive World
Brake Systems
Car Stereo Repair Advice
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair

Steering and Suspension
Tricks of the Trade
General Discussions
Car Shows and Events
The Bargin Bin
Motor Vehicle Inspection
Car Care Tips
Traffic Ticket Help
Car Racing

Gasoline, Motor Oils, Concept Cars
Remote Control Cars and Vehicles
Truck Repair
Truck Repair Advice


Truck Engine Repair
Truck Suspension Repair
Motorcycle Repair
Motorcycle and ATV Repairs

Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Seat Repair
Car Forum Posts - Sitemap


Search for (options) Privacy