99 Navi and I dont know what 2 DO!!!!!!!

[b.a.voice]

I'm back fellas and my truck is still giving me problems. The problem with my truck is if I'm sitting at a red light or even just sitting in a parking spot with my car on, you can hear and feel the engine slowly about to die out. You can see the rpm's slowly going to 0 and it will just shut off. When I'm on the highway and say I go about 80mph, it will kinda slow down by it self...the truck will just slow down like I'm pushing the break, not significantly but you can feel it so I have to keep my foot on the gas for it to keep up at the speed that I want.

Here is my thing. I've had the truck for 1 year now and just about two weeks ago I started putting 93 gas in it. Before I was using regular. I know...thats terrible but I had no clue. Its been giving me this problem for about 3 weeks now and I dont know what to do. I took it in and got a diagnostic from the dealer which cost me an arm and a leg and they told me to replace the idle air control valve along with the o2 sensors so I did that and same problem. Can anyone help me out, I need to fix this problem asap. Thanks.


B.A.

 

[LincolnTech38]

did you have the dealer do the work, if so take it back and tell them it didnt fix the problem and you want you money back or it fixed right.

It sounds like you have a clogged catalytic converter.

 

[LincolnTech38]

oh and I still see from your other thread you didnt pay attention to my post and have the vacuum lines checked as I suggested.

if the check engine light is on and you have a p0171 and a p0174 I would start looking for that vacuum leak.

 

[fordtechguru]

cats plugged, naww, air leak would cause ses lamp right? do need more info to go on though.. anything elso you can say??? lol

 

[2001LS8Sport]

It sounds like you have a clogged catalytic converter.

:I

 

[jdmabry]

I think you should check out my post Here. I just went through the same thing.