My truck has started backfiring. it drops to a low idle when i start it, and it makes a weird noise when the rpm's drop.
Sep 25, 2019 at 3:00 PM
Engine backfiring
HUNTER STUCKER
- MEMBER
- 1 POST
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Hello,
This could be a problem with the Idle Air Control (IAC) valve on your engine. This is a PCM controlled valve that allows the proper amount of air to bypass the closed throttle plate when the vehicle is at idle. In the diagrams down below I have included diagnostic testing guide for your vehicle's IAC valve. Please go through it and get back to us with what you are able to find out.
Thanks,
Alex
2CarPros
This could be a problem with the Idle Air Control (IAC) valve on your engine. This is a PCM controlled valve that allows the proper amount of air to bypass the closed throttle plate when the vehicle is at idle. In the diagrams down below I have included diagnostic testing guide for your vehicle's IAC valve. Please go through it and get back to us with what you are able to find out.
Thanks,
Alex
2CarPros
Images (Click to enlarge)
Sep 25, 2019 at 4:15 PM