ctmystique
Hard-core CEG'er
Ok here's my plight...
In the early spring I had spun a rod bearing in my 2.5L mystique so I did a 3.0 hybrid conversion with 2.5 heads and SE intake setup. Ever since then the cars has had a rough time starting. It starts ok when cold but recently after it gets hot it won't restart until it cools back down. I believe this may be due to high compression?? I tried replacing the starter but that didn't help the starting issue. It has also been idling very rough @ 750 rpm. If I bring the idle up to 1500 rpm it runs fine. I'm at my wits end trying to figure this out.
Here's what I've tried and or changed.
1. new plug wires (plugs were new at engine swap)
2. idle air control
3. cam sensor
4. crank sensor
5. engine wire harness(really bad insulation deterioation)
6. new starter
7. coil pack
8. maf sensor
9. SVT computer
10. SVT injectors
11. SVT exhaust
These are not in any particular order just as I remember that I've swapped.
I also am getting CEL codes
p301 misfire cyl 1
p302 misfire cyl 2
p303 misfire cyl 3
p171 system lean bank 1
p174 system lean bank 2
p1401 DPFE sensor circuit high voltage
I have a DPFE sensor that I'm going to swap out soon as well.
If anyone has had the same or similar symptoms I'd be eager to try some suggestions.
In the early spring I had spun a rod bearing in my 2.5L mystique so I did a 3.0 hybrid conversion with 2.5 heads and SE intake setup. Ever since then the cars has had a rough time starting. It starts ok when cold but recently after it gets hot it won't restart until it cools back down. I believe this may be due to high compression?? I tried replacing the starter but that didn't help the starting issue. It has also been idling very rough @ 750 rpm. If I bring the idle up to 1500 rpm it runs fine. I'm at my wits end trying to figure this out.
Here's what I've tried and or changed.
1. new plug wires (plugs were new at engine swap)
2. idle air control
3. cam sensor
4. crank sensor
5. engine wire harness(really bad insulation deterioation)
6. new starter
7. coil pack
8. maf sensor
9. SVT computer
10. SVT injectors
11. SVT exhaust
These are not in any particular order just as I remember that I've swapped.
I also am getting CEL codes
p301 misfire cyl 1
p302 misfire cyl 2
p303 misfire cyl 3
p171 system lean bank 1
p174 system lean bank 2
p1401 DPFE sensor circuit high voltage
I have a DPFE sensor that I'm going to swap out soon as well.
If anyone has had the same or similar symptoms I'd be eager to try some suggestions.