HI I am at a loss here. Please take your time and read everything I write here, so you will know excactly where I am at.
I want you to know I really Appreciate any help or suggestions and please don't take offense but
PLEASE READ THE ENTIRE POST
before suggesting any theorys.
I have a 2003 GT Car always ran good with no problems before.
Then a week ago one day while driving I had problems with the car losing power and my engine light started blinking..It was stumbling and almost seemed like it wanted to die and when I stopped it started shaken and chockin then the engine light came on. Got home and parked it Next day started it and did the same thing but this time my engine light was blinking so I hooked it up to a DBR II scan tool and got P0172 fuel trim System Rich Bank 1 and "P0302 Cylinder 2 Misfire Detected"
A friend suggested I change the Plugs, Wire, Coil Pack in that order..
So I had on planning to put my stage 1 that I bought a few months back.
So I figured if I am going to change the plugs and wires then I will just install all of the parts while I am there.
So this is what I did
Changed PCM to Stage 1
Changed upper/Lower intake to the plastic ones from a 06 GT
Changed Coil pack from a 03 (used and working)
Changed spark plugs (NGK) gapped at .38
Changed Plug wires to MSD 8mm
Changed MAP sensor
(recently just changed the Fuel pump)
When I was done...she fired up the first crank with no problems. Then I drove it home from my buddys shop which is about half a mile from my house. I didn't have a problem at all with the car. She was running beautiful!
Next day I took her out drove for a good 45 minutes with no problems
and then I came to a stop sign and it started shaken and felt like it was going to die. I started going again and it ran fine
until I stopped again. It felt like the same problem I had before I changed everything.
Today I used my remote car starter and had no problems at all the car idled fine; let it run for about 10 mins before I left. So I left and got about half a block and she started acting up again.
.turned around went home and parked it. Went and did some errands with my other Pt; got home and started the GT again but this time it was shaken/dyin right away.
the engine light hasn't come on and isn't blinking like it did before. Checked to see if there were any error codes that came up; but there isn't any.
No smoke, No backfiring, No Engine light on or blinking, No Codes, just shakes and feels like it's going to die; just like it was doing the first time, before I changed everything.
Yesterday I talked to my mechanic friend (sort of) He told me it is the fuel pump. So I got him to put a new one in
it and again it ran fine. Then this morning I went out and took it for a drive and it started doing the same thing again! I noticed though it runs alright until I punch it/floor it or give it lots of gas at once then it starts doing the same stuff all over again. I am at a loss????? It is driving me nuts and I hate taking my car to a shop to get it fixed. Anyone have any ideas? It's going to snow the next couple of days, so I really want to fix this soon and I can't really afford to take it in..