All times are UTC - 6 hours [ DST ]




Ask A Question Reply   
Author Message
 

contributions: 1
My 95 z71 dies when I turn on lights and heater battery good alternator good. Running rough no power too? Changed fuel filter.break petal gets harder when I give it gas to?


   
Reply with quote  
* Search   
 
User avatar

contributions: 2275
Images: 37
Location: Oregon
I would check your exhaust back pressure.

the brake booster works on engine vacuum (unless you have hydroboost) so if you engine is running poorly and you open the throttle to accelerate you loose your vacuum. So, it must be pretty bad if it is affecting your brake pedal.

turning on electrical loads ( the lights, the heater...) make the engine have to work harder because they make the alternator work more putting a load on the alternator belt slowing the crank pulley.

you might also check your cylinder compression...

you should also look at your injector spray pattern. you should have throttle body injection so with your air cleaner and the air cleaner riser removed you can watch your injectors spray fuel down the throttle body.
https://www.youtube.com/watch?v=5A4a5OOGqPo


   
Reply with quote  
 

contributions: 11
start with checking codes-
check for a vacuum leak- use the old spray trick.
FYI: Can also check back pressure with a vacuum gauge.
This should be a spider fuel injection YES? Anyway check fuel pressure.

How did test alternator as being good?


   
Reply with quote  
 
User avatar

contributions: 2275
Images: 37
Location: Oregon
95 should be throttle body. 96 should be CPI.

also, possibly weak egr valve problem could cause it to open under load.


   
Reply with quote  
Ask A Question Reply   

   Similar Topics   Author   Replies   Views   Most Recent 
New Articles View the first 1995 Chevrolet Silverado Exhaust Blows Black Smoke

in Chevy Silverado

sweetnsassyjenn

2

1959

Wed Mar 17, 2010 12:15 am

sweetnsassyjenn View the latest

New Articles View the first Chevrolet Trailblazer Dies Out Idle and surge with A/C

in Chevy Trailblazer

Sue

1

4179

Tue Dec 01, 2009 1:16 am

Mechboy View the latest

New Articles View the first 94 chevy silverado 5.7l runs then dies

in Chevy Silverado

Slurper

1

2293

Sat Feb 01, 2014 2:57 pm

carriedi View the latest

New Articles View the first 1999 Silverado Starts and dies

in Chevy Silverado

Jeffrey

3

2533

Fri Oct 17, 2014 12:36 am

carriedi View the latest

New Articles View the first 90 chevy silverado dies when i floor it

in Chevy Silverado

Mayhem0311

5

2779

Wed Nov 13, 2013 3:05 am

carriedi View the latest

New Articles View the first 1991 chevrolet silverado trans leak at shaft

in GMC Trucks

kilo35

1

1238

Wed Jul 24, 2013 8:33 pm

TerryAuto View the latest

New Articles View the first 94 chevrolet silverado tbi problem with exessive fuel, timin

in Chevy Silverado

eduardo1

1

2002

Sun Nov 10, 2013 11:01 pm

carriedi View the latest


All times are UTC - 6 hours [ DST ]



Search for:
Jump to:  
Contact Us