"99 Rodeo

Yup one of two things have someone or you clean the EGR valve it sound as though it is doing whay mine did , sticking take it off and soak the base in carb cleaner for about 30 mins or so then make sure the little plunger moves freely. another cause if this is a known fault of the intake gasket (plastic ) breking apart alowing air where it should not be getting you can find this either by listening to an idling engine for a hiss of lightly spaying carb cleaner around the base of the intake with an idling engine if it is leaking the engine will speed up or try to die if to much is sprayed

Thanks for the info! I'll have my husband check it out. I am just confused though...why isn't something like this caught with an overall check up on the car?

2 things, the problem is intrmitant, sometimes the egr valve sticks and other times it works fine. AND most machanic, don't check everything and also don't have a clue, and love to take your money anyway. My own son is a machanic, and I have asked him questions that he can't answer, I can't either but I play and find out for myself...I found this only by accident , when my passport was acting up ,

I told my husband about waht you said and he's going to check it out. Of course, it hasn't done it again! lol That's why I've always had trouble trying to explain what it is the car is doing. They always look at me like I'm crazy...