My 1995 Grand Cherokee is acting up this week. After about 30 miles of driving it. The truck starts to slow down on its own. I push the gas and it just bogs down. After shutting the truck off for a few hours its fine for another few miles and happens again. Any help would be great. The engine sounds fine. It just feels like someone is pushing the brakes.
Oxygen sensor maybe? Check that too. Don't go tossing parts at it these are just ideas to check first not to replace. Yo know how long it's been since the O2 sensor has been replaced right? Is the Cat original? How may miles on these parts?
The cat is original and so is the O2 sensor. The mileage is 194,000 The muffler is new. I unbolted the muffler today and the cat is completely empty. Its hollow inside. I bought this jeep 1 month ago. It passed all California smog. I dont drive it everyday just when its bad weather.
Wow . I can't believe it passed with a hollowed cat . I'd definately toss a new fuel filter on it and then run a pressure test to see how healthy the pump is if the filter doent do the trick .
Btw , mods get anal about removal or modifying emmisions equipment due to federal laws . Legally you should replace it however you now have a good arguement since it passed the strictest emmisions testing in the US . What do the feds know right ?
The truck was sitting for about 9 months as well. So the empty cat wont affect anything with the sensors? Does it need a new O2 sensors ?Theres no check engine lights everything runs fine. Prolly gas is no good and fuel filter needs changed. I thank you for all your help.
I unpluged the O2 sensor. Check engine light has come on. Still does the same thing at about 30 miles. The engine runs great. At about 55mph the truck seems to just start slowing down. I push the gas pedal all the way down and the truck just slows down. I turn it off the air lowers the truck down and its fine for another few miles. I changed the fuel filter also.