Engine backfiring

1997 DODGE CARAVAN
213,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
JUSTTHETIP
  • MEMBER
  • 1 POST
I have changed the crank timing sensor, but the problem still remains, i have tried adjusting the sensor many, many times, but no better results, it seems to happen when encountering a slight grade while speeding up or when calling for more speed to pass, it seems to be worse when engine is hot, on hot days and while a/c is on
I recently replaced the fuel pump, and have checked for vacuum leaks and replaced bad sections, have changed air filter, pvc etc, also had the tranny shift module changed
Any advice will be helpful
Thank you in advance
Jul 24, 2009 at 3:47 PM
Advertisement
Avatar
KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
There are a number of things that can cause a backfire so let's start with this guide:

https://youtu.be/HiI_eeFg-2A

Once we get through this guide, we are going to have to check the timing and the timing chain to make sure it has not stretched.

The fact that you have better operation going uphill points to a load related issue which can be timing.

So please see the info attached on how to check this.

If the timing chain is stretched or not timed correctly then we need to replace the chain.

I attached the info on this as well.

Let us know what you find with this, and we can go from there.

Thanks
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Jan 28, 2022 at 6:25 AM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle