go in reverse sometimes it stalls?

1998 CHEVROLET BLAZER
192,000 MILES • 4.3L • V6 • 2WD • AUTOMATIC
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BRIBRI4275
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When I first start it then go in reverse sometimes it stalls. Also, when I put it into drive it doesn't go past 2,000 RPMs and it seems to lose power. What could cause this?
Sep 30, 2024 at 1:30 AM
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STRAILER
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It seems like you may have two problems but let's handle the stalling in this thread. I would first replace the IAC valve which should helps with the stalling. Here is a guide to go over as well and I have included two guides that can help as well.

https://www.2carpros.com/articles/stall-at-idle

And this guide can help get any codes that can lead us to the problem:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with. I would service (clean) the throttle bore and IAC passages as well.
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Oct 1, 2024 at 10:30 AM