Well first off I swapped a 2004 Gt engine into my 96. The engine bolts to an 02 4r70w that I've had in for years (pins swapped and everything). that's just to let you know what's pushing me.
What we've done to the engine:
I believe that should give you some info on the motor. I don't think I left anything out.
Here's some pictures to show vacuum routing etc if it helps.
Now, the issues right now are:
What we've done to the engine:
- Stock internals
- 04 valve covers and we've replaced the heated sensor on the left side cover with a regular sensor.(it's the same thing just no electrical connection)
- We've done the normal stuff for PI swap:
- used my 96 harness
- 96 oil pan (due to the sensors in the 96)
- 96 fuel rails
- 96 coil packs
- We swapped the 04 water pump with the 96 water pump so that I could use the underdrive pulleys I originally had
- 96-98 UPR Off road X-pipe with MIL's
- TR55 NGK Plugs
- Ford Racing plug wires
- MAC CAI with the stock 96 MAF
I believe that should give you some info on the motor. I don't think I left anything out.
Here's some pictures to show vacuum routing etc if it helps.
Now, the issues right now are:
- Driver's side exhaust leak where the X-pipe bolts to the manifold
- low idle/no idle
- Doesn't feel like it's running 100%
- stuttering under light consistent throttle
- CEL codes:
- P0156 - Heated oxygen sensor bank sensor 2
- P1152 - Lack of o2 switches - bank 2 sensor 1 - rich
next, the car idles low, and sometimes it doesn't idle at all. It's almost like there's a problem with the IAC, but I don't want to buy the part only to find out it's not the issue. The low idle could just be because it needs a tune. I can deal with the low idle until a tune, but I can't deal with no idle. Coming up to stop lights and not knowing if the car will cut off or not isn't quite fun.
as for it not running 100%, don't get me wrong..it does feel strong, but it feels a little sluggish in the low RPMs under throttle. It's only for a bit until it hits 1500rpm or so. The exhaust leak could also be helping to the problem here.
The stuttering....If I'm cruising at 45 or 50 in Drive (this is where I notice it the most) the car is a bit jerky. It's very slight, but it's just enough to where it's not smooth and holding at a certain RPM.
Now, the CEL codes. Possible causes listed under the scan for P0156:- oxygen sensor defective
- system running very rich or lean
- engine misfire condition
- fuel pressure very high or low or fuel pump or pressure regulator
We had a bit of an issue getting the vacuum ran right for the EGR stuff, but I think we have it right now so I don't see how that would be an issue, unless it's still off. the o2 sensors aren't new, but they weren't causing an issue before the swap.
Possible causes listed under the scan for P1152:- fuel pressure high
- egr stuck open
- "engine mechanical condition"
I tried to be as detailed as possible so I wouldn't leave anything open and you guys could get a good idea of what I'm working with.
I hope someone can help me trouble shoot this stuff. I'm not sure where to start. I'm hoping fixing the exhaust leak will help with some of this stuff.