I'm having a problem where it feels like the fuel injectors are completely cutting off under certain conditions.
The first time I recall this happening was about 1.5 years ago. At the time, I was running 2 extra injectors, the MPI, and an FM clamp, and my EGR pipe was welded shut.
I've since changed my IM, turbo piping, rebuilt the motor, rewired the MPI, got new secondary injectors/few rail, installed a JoeP FCD, etc etc etc.
If i reset the computer, it will normally occur within 3 miles or so, the first time I drive it.
What it did was this:
The car will be warmed up. I'll be cruising down the road at a light throttle position, usually doing 40+mph.
1-All of a sudden, the power cuts off.
2-The WBO2 shows fully lean (leaner than 20:1...off the charts)
3-The car would continue to have no power for several seconds (NOTE: Although if I go WOT, it will respond as normal, and then return to step 1 moments later).
4-All of a sudden, it would backfire. Sometimes it would cycle between steps 3 and 4 several times, until finally...
5-One of the backfires would stall the car. While still cruising, i would simply turn the key into the "off" position, and back into the "on" position.
6-The car would run fine instantly, but it would immediately throw a CEL, which would complain about insufficient EGR flow.
Once the CEL was on for the EGR flow, the above would never occur again until I reset the ECU again.
However, to avoid this CEL, I've recently hooked up a new EGR pipe, although due to lack of EGR provisions in my exhaust mani, the EGR pipe is just breathing in air from the atmosphere.
While this works great for avoiding the CEL, it does the same thing that I listed above, albeit without actually throwing the CEL. The problem is that it does it about 1/3rd of the time I drive the car.
Input?
The first time I recall this happening was about 1.5 years ago. At the time, I was running 2 extra injectors, the MPI, and an FM clamp, and my EGR pipe was welded shut.
I've since changed my IM, turbo piping, rebuilt the motor, rewired the MPI, got new secondary injectors/few rail, installed a JoeP FCD, etc etc etc.
If i reset the computer, it will normally occur within 3 miles or so, the first time I drive it.
What it did was this:
The car will be warmed up. I'll be cruising down the road at a light throttle position, usually doing 40+mph.
1-All of a sudden, the power cuts off.
2-The WBO2 shows fully lean (leaner than 20:1...off the charts)
3-The car would continue to have no power for several seconds (NOTE: Although if I go WOT, it will respond as normal, and then return to step 1 moments later).
4-All of a sudden, it would backfire. Sometimes it would cycle between steps 3 and 4 several times, until finally...
5-One of the backfires would stall the car. While still cruising, i would simply turn the key into the "off" position, and back into the "on" position.
6-The car would run fine instantly, but it would immediately throw a CEL, which would complain about insufficient EGR flow.
Once the CEL was on for the EGR flow, the above would never occur again until I reset the ECU again.
However, to avoid this CEL, I've recently hooked up a new EGR pipe, although due to lack of EGR provisions in my exhaust mani, the EGR pipe is just breathing in air from the atmosphere.
While this works great for avoiding the CEL, it does the same thing that I listed above, albeit without actually throwing the CEL. The problem is that it does it about 1/3rd of the time I drive the car.
Input?
