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Blazer Stalling at red lights

Tiny
STADNYKC
  • MEMBER
  • 1994 CHEVROLET BLAZER
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 195,000 MILES
Starts and idles fine, lots of power. Changed fuel pump, fuel filter, cap and rotor, spark plugs, and cleaned the egr valve and its still stalling at red lights.
Saturday, July 4th, 2015 AT 2:10 PM

20 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Clean the throttle body and idle air control, see if it helps? If your fully obd1 compliant, check for applicable codes, see if anything shows up? Go from there.
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Saturday, July 4th, 2015 AT 2:50 PM
Tiny
STADNYKC
  • MEMBER
  • 4 POSTS
When I bought it I used one of tjose cans of sea foam motor treatment that goes through the intake. I have also put a jumper from the a and b connectors and no trouble codes are coming up.
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Saturday, July 4th, 2015 AT 6:02 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Does the mil on the dash work? You should have got at least a code 12, if nothing else? I've seen plenty of older vehicles where that lamp was out. On these vehicles, I use a scanner that shows live engine data, even though I can't check codes, I can still look at live engine data, see if I notice anything.

If the tcc is hung-up, it will kill the engine when you come to a stop.
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Sunday, July 5th, 2015 AT 10:13 AM
Tiny
STADNYKC
  • MEMBER
  • 4 POSTS
I get code 12 but thats it. Ive been told the catalytic converter might me plugged full so im taking that out to check
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Sunday, July 5th, 2015 AT 6:07 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Just my opinion, I don't think the problem is a clogged exhaust? If clogged exhaust it should bog down under load? I hope you get it going your way.
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Monday, July 6th, 2015 AT 8:51 AM
Tiny
STADNYKC
  • MEMBER
  • 4 POSTS
What sould be the next thing to check if its not the exhaust?
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Monday, July 6th, 2015 AT 8:57 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I mentioned your torque converter clutch.
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Friday, July 10th, 2015 AT 7:19 AM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
Would the torque converter clutch locked up cause my Blazer to immediately shut off when put into drive?
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Tuesday, March 22nd, 2022 AT 10:42 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,490 POSTS
Yes, it will, when the converter has a problem there is no "free wheel" affect so the engine will stall the second you put it into gear. If you send a video I can tell for sure, you can upload it in your response.
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Thursday, March 24th, 2022 AT 9:54 AM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
I will go to the shop tomorrow and get a video. I agree though, that is exactly what it's doing.
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Thursday, March 24th, 2022 AT 1:56 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,490 POSTS
You can put the car in neutral when coming to a stop to see if the problem goes away, this will confirm the issue.
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Thursday, March 24th, 2022 AT 1:57 PM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
It won't even drive to check this, but I do believe you can go from Park into neutral without shutting off. Only cuts off when put into any drive gears, as if the key was turned off. Just cuts right off.
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Friday, March 25th, 2022 AT 10:19 AM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
I'm trying to find a ride over to shop for video. Do you by chance have a video of what this would look like yourself? I'm pretty positive you're correct but the shop seems to not want to. It's been there a month!
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Friday, March 25th, 2022 AT 10:21 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,490 POSTS
We don't have a video of the failure because the torque converter needs to be cut open to see it. I wanted to see a video of the vehicle coming to a stop and then stalling that way I could be sure. It sounds like it is the problem though.
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Friday, March 25th, 2022 AT 10:44 AM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
Okay yes, because it cuts out when put into drive, we can't drive it. I gave them the info, hopefully he reads up on this but they have spent a month on it, and it's being done free to me, so I just have to accept it as is. I just wish they had found this info out on their own a month ago instead of guess work. Had I known they too would be guessing at stuff, I'd had just kept doing that myself. They were successful in getting it to idle without shutting off at least. Sounds great idling, lol, but I'm still without transportation. Not sure how I'll get it back to the house. How difficult is it to change the torture converter? It's just disconnecting transmission and moving it back a little to access TC? Or is it more involved?
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Friday, March 25th, 2022 AT 11:00 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,490 POSTS
You must remove it completely. These videos will give you an idea of what is involved:

https://youtu.be/3vJAojsrfuU

and

https://youtu.be/ZC7xHVMKLRw

Please run down these guides and report back.

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Friday, March 25th, 2022 AT 11:05 AM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
Okay great. You are much appreciated sir.
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Friday, March 25th, 2022 AT 11:23 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,490 POSTS
Use 2CarPros anytime, we are here to help. Please tell a friend.
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Friday, March 25th, 2022 AT 11:24 AM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
So, the transmission has to be removed completely not just disconnected and pushed back some. Okay, well that just assured me to not let the person saying he can do it, do it. That helps immensely. Okay. I have to make some calls to find someone. Thank you again.
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Friday, March 25th, 2022 AT 11:33 AM
Tiny
CHRISTINA MICHELE PECK
  • MEMBER
  • 10 POSTS
I absolutely will be recommending you guys every time. Wish I knew about you when this first began. Better late than never though. Won't be selling Blazer after all. Thank you
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Friday, March 25th, 2022 AT 11:34 AM

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