1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

1997 chyenne 1500, rough idle, stalling in p/r/d, chokes when I hit the gas

Thread Tools
 
Search this Thread
 
Old Mar 16, 2019 | 4:56 PM
  #1  
Mike Lord's Avatar
Thread Starter
CF Beginner
 
Joined: Mar 2019
Posts: 4
Likes: 0
Default 1997 chyenne 1500, rough idle, stalling in p/r/d, chokes when I hit the gas

http://imgur.com/gallery/PPTf5HM
for videos of the problem hanged mass air flow sensor
Changed crank shaft position sensor.
Changed throttle body sensor
Changed I a c (idle air controller).

Starts rough, idle evens out, in park or drive or reverse as soon as you hit the gas it stalls out.

Fuel pump and fuel pressure regulator where changed in fall.

We located the idle screw (see picture) and we turned it completely around slowly almost 5 times and it made no difference. We were trying to see if we could get it to not stall out.
This seems really irregular as it should only need tiny little movements


Reply
Old Mar 16, 2019 | 7:06 PM
  #2  
Irish_alley's Avatar
I'm here for the party
5 Year Member
Liked
 
Joined: Feb 2019
Posts: 1,467
Likes: 83
From: Maryland
Default

i would recheck the fuel pressure just to eliminate that. ive even seen new pumps be bad right out of the box
Reply
Old Mar 16, 2019 | 7:12 PM
  #3  
Mike Lord's Avatar
Thread Starter
CF Beginner
 
Joined: Mar 2019
Posts: 4
Likes: 0
Default

Originally Posted by Irish_alley
i would recheck the fuel pressure just to eliminate that. ive even seen new pumps be bad right out of the box
What would be the easiest way to check that? One person technique or two person?
Reply
Old Mar 17, 2019 | 6:40 AM
  #4  
Irish_alley's Avatar
I'm here for the party
5 Year Member
Liked
 
Joined: Feb 2019
Posts: 1,467
Likes: 83
From: Maryland
Default

um a fuel pressure tester
Reply
Old Apr 29, 2019 | 4:15 AM
  #5  
Kenneth Brown's Avatar
CF Beginner
 
Joined: Apr 2019
Posts: 2
Likes: 0
Default

check for a clogged cat.. or muffler. you can check for back pressure in the exhaust. should never be more than 1 to 2 lbs of back pressure.
Reply




All times are GMT -5. The time now is 12:36 AM.