I have a 97 grand caravan and for the most part it runs well. When driving at 60 or greater it will sometimes backfire when accellerating to pass or go up a hill. It doesn't backfire when accellerating at lower speeds. Any thoughts?
Thanks in advance

 

I had that happen when my EGR valve was starting to go bad. Has your mileage dropped off a little?

 

I will check with my wife it's her van. How do you check the egr valve?

 

Th thing that usually goes bad is the vacuum solenoid which comes with the valve. It will eventually set a check engine light. I've gone through this with a few of my caravans and was usually pre-ceded by poor gas mileage before the mil light. On my first 97, I remember a few backfires (one of which actually split the crimp on the muffler) , and this was before the mil came on.

 

well before i totaled my 96 grand caravan se with the 3.3 engine i replaced the egr valve twice i had 288,000 miles on it until i hit a deer with it.. and my fuel mileage never dropped i was still pulling 25 mpg.. but i used my van to haul a ton of papers 7 nights a week..

 

could just be sh!tty gas