Absolutly Frustrated!

Okay, Im going to try and make this as simple as possible explain.. straight to the point the best that I can.

I have a 1999 Cougar, automatic transmission, v6, 2.5 L engine, built date of Aug 1998. Here are the problems/symptoms: stalling, stuttering, dies while in park and while ideling, check engine light on (no codes except memory code for lean exhaust on bank 1 and 2).While driving, I have to have my foot on the gas and the brake at the same time to keep it from dying in traffic. The best way to describe it would be to say that it acts like its running out of gas. Then, this morning I was warming it up, and I got out to scrap the ice off my windows, and it died. As a result, the key was left in the on position for about 3 or 4 min. Not very long at all, but when I went to start it, didnt want to. It was like the battery was weak and dying or something. I had to sit for a couple mins to get it to started. Another strange thing is that the LED display that shows my odometer, clock, temperature, etc keeps messing up. Sometimes its on, sometimes its partial visible, and sometimes its completly gone. (when it comes back on, its still current)

The things we have already done... rebuilt alternator, replaced fuel pump, replaced mass air flow sensor, replaced air coolant sensor, cleaned EGR valve, replaced air intake hose, and changed air filter. Its about to drive me crazy because we have no idea what to fix, and the mechanics say there are no new codes. They have no clue. I've heard several different things from different people. Ive heard about battery wires being misrouted to the alternator causing it to go bad, Ive heard something about vacuum lines leaking, o2 sensors going bad, the cat converter going out. I wondered if anyone else has had this problem. HELP!!! :wtf:

you have a vacuum leak, which is throwing a lean code and is causing it to run like crap.

You might have a vacuum leak at the upper intake manifold gasket. Have you ever uninstalled the manifold?

Okay, Im going to try and make this as simple as possible explain.. straight to the point the best that I can.

I have a 1999 Cougar, automatic transmission, v6, 2.5 L engine, built date of Aug 1998. Here are the problems/symptoms: stalling, stuttering, dies while in park and while ideling, check engine light on (no codes except memory code for lean exhaust on bank 1 and 2).While driving, I have to have my foot on the gas and the brake at the same time to keep it from dying in traffic. The best way to describe it would be to say that it acts like its running out of gas. Then, this morning I was warming it up, and I got out to scrap the ice off my windows, and it died. As a result, the key was left in the on position for about 3 or 4 min. Not very long at all, but when I went to start it, didnt want to. It was like the battery was weak and dying or something. I had to sit for a couple mins to get it to started. Another strange thing is that the LED display that shows my odometer, clock, temperature, etc keeps messing up. Sometimes its on, sometimes its partial visible, and sometimes its completly gone. (when it comes back on, its still current)

The things we have already done... rebuilt alternator, replaced fuel pump, replaced mass air flow sensor, replaced air coolant sensor, cleaned EGR valve, replaced air intake hose, and changed air filter. Its about to drive me crazy because we have no idea what to fix, and the mechanics say there are no new codes. They have no clue. I've heard several different things from different people. Ive heard about battery wires being misrouted to the alternator causing it to go bad, Ive heard something about vacuum lines leaking, o2 sensors going bad, the cat converter going out. I wondered if anyone else has had this problem. HELP!!! :wtf:

i agree ,the intake manifold gaskets may be at fault, if you change them replace them both, upper and lower questions [email protected]

i agree ,the intake manifold gaskets may be at fault, if you change them replace them both, upper and lower questions [email protected]
My mechanic (not the dealership) unplugged my EGR valve on Friday and its been running fine ever since....whats up with that?

The EGR or intake gasket or crack intake is the problem