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1991 Chevy Blazer

Tiny
HAPABOY7
  • MEMBER
  • 1991 CHEVROLET BLAZER
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 127,000 MILES
I've recently found that my Blazer has a tendency to stall out when both idling as well as when I apply the brakes. It also tends to jump and jerk when placed into reverse. I've driven the car around the block and found, for the most part, that if I placed the car into neutral and then applied the brake it seemed not to stall out. I feel as if I'm trying to drive a car with manual transmission in a high gear without using the lower gears. I think this maybe a major problem, so I wanted to get second opinions before a spend a fortune fixing it.
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Tuesday, June 30th, 2009 AT 1:21 PM

7 Replies

Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
Those three things make me think of what happens when a torque converter is locked up.

Do you know how fast it is idling when you are in park?

If you are at a stop and put it in drive, does it stall suddenly, or slowly?
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Tuesday, June 30th, 2009 AT 2:39 PM
Tiny
HAPABOY7
  • MEMBER
  • 4 POSTS
No. Unfortunately there is no RPM meter in the car, and yes sometimes it does stall when I put it back into drive.
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Tuesday, June 30th, 2009 AT 3:22 PM
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
If it was the converter, it would stall suddenly, everytime you put it in gear.
Does it do that?
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Tuesday, June 30th, 2009 AT 3:32 PM
Tiny
HAPABOY7
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  • 4 POSTS
It doesn't do it, suddenly but it does stall most of the time.
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Tuesday, June 30th, 2009 AT 3:33 PM
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
I'm really needing to know what it's idling at.

Does it run smooth in park?

And I want to make sure of some info.
You have a 4cylinder
with an automatic
and 4 wheel drive.
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Tuesday, June 30th, 2009 AT 3:39 PM
Tiny
HAPABOY7
  • MEMBER
  • 4 POSTS
I can try to find out. It is a 4.3L, V6 EFI, 4 Wheel Drive, and Automatic. I just tried it again and it seems to run fine while in neutral, but definitely jumps and jerks while in reverse, and stalls out when put into drive.
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Tuesday, June 30th, 2009 AT 5:52 PM
Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
Sounds like it might be idling too low.
Or the idle control isn't working.

Pick up a $10 dwell/tach meter at a parts store.
And report back with the RPMs
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Wednesday, July 8th, 2009 AT 11:18 PM

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