HI I love my 2004 diamante. But the dealership is unable to diagnose this problem and I have spent a lot of money with replacement parts for them to do so. Basically it starts like a gem on the cold starts. Or if the engine has been off for an hour. However if I drive 30 mins then turn it off and wait about 10 minutes and try to restart, it dogs the idle rpm needle jumps up and down really really low to nearly zero, it will stall sometimes other times not it pulls-out-of-it or I gun it and then everything is fine - if I then drive so more...such as running earrands and stop again it will proceed to almost get worse with every stop and wait a bit and go again. It throws NO CODES and they can't get it to throw a code. This has been happening for 2 years

Has anyone heard of such a thing. I am getting tired of the dealership trying new parts and nothing works.

I just know there is someone brilliant out there who has seen this before or knows what it is? My car only has 41k miles...I don't go very far LOL

 

Did you ever figure this out? My car is doing the same thing.