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It seems like a relatively straight forward process, but somehow I managed to mess it up. Wanted to see if someone could point me in the right direction. I am going by "version 2" setup.
Attached is a photo of how I hooked it up. The hoses that I removed from the wastegate and actuator that go into the rats nest I left open. Do I need to cap or loop those lines?
Can runs terrible, like the MAP sensor is unplugged. What did I do wrong.
Messing with those hoses shouldn't have any impact on how the car runs or generally drives. If you get it really wrong you could overboost or have very low boost, that's pretty much the only negatives from working in that area.
The plumbing is pretty clearly laid out in the the Version 2 diagram. Tee the inputs from the top nipples coming off the compressor housing into the Profec solenoid, tee the nipples pointing up from the 2 "cans" into the Profec output, and cap the nipples on the cans that point to the right.
If the car is running poorly that's a whole different problem than any of this plumbing.
Messing with those hoses shouldn't have any impact on how the car runs or generally drives. If you get it really wrong you could overboost or have very low boost, that's pretty much the only negatives from working in that area.
The plumbing is pretty clearly laid out in the the Version 2 diagram. Tee the inputs from the top nipples coming off the compressor housing into the Profec solenoid, tee the nipples pointing up from the 2 "cans" into the Profec output, and cap the nipples on the cans that point to the right.
If the car is running poorly that's a whole different problem than any of this plumbing.
Dale
Which is why I am so confused. Literally parked the car from running perfectly fine, install exactly how you just said. Started the car in the garage and it sounds like a go kart without power. Didnt drive it at all. The only thing I didnt cap is the hoses going to the solenoid, but figured it doesnt matter because they make a loop back to the wastegate? Hopefully my actual photo showed up with comments in red?
I believe the previous owner has the rats nest simplified and maybe moved hoses to different locations? Another thing to note is that I could not find how the previous setup was controlling boost. Car is running 14psi, but I dont see any kind of manual boost controller or the Apexi boost controller installed. Figured maybe they put pills in the line to keep it at 14psi. Or is it possible that they ran the MAP sensor back to the wastegate? It literally feels like the MAP sensor is unplugged(its not).
Last edited by iceman4357; Jun 29, 2020 at 09:19 AM.
The MAP sensor should be plugged into the back of the upper intake manifold. I would double check that it's plugged in to that and not T'd into something weird. The MAP sensor should always have its own vacuum source, NEVER any T's.
Stock, the 2 nipples that point to the right on the cans go up to the 2 solenoids bolted to the front of the UIM, the wastegate and turbo precontrol solenoids. They go in the solenoids then out back to the primary turbo inlet duct. Mazda had to vent it back to the intake like that for emissions reasons.
Could also be possible you just flooded it from starting it cold and shutting it off or something. May have a fouled plug.
The MAP sensor should be plugged into the back of the upper intake manifold. I would double check that it's plugged in to that and not T'd into something weird. The MAP sensor should always have its own vacuum source, NEVER any T's.
Stock, the 2 nipples that point to the right on the cans go up to the 2 solenoids bolted to the front of the UIM, the wastegate and turbo precontrol solenoids. They go in the solenoids then out back to the primary turbo inlet duct. Mazda had to vent it back to the intake like that for emissions reasons.
Could also be possible you just flooded it from starting it cold and shutting it off or something. May have a fouled plug.
Dale
Thinking it may be fouled plug, sounds like its running on half a motor. Video link below. Messing with these hoses, I believe should not have an impact like this on the motor. Going to swap all hoses back to way they were to see, then will pull the plugs and check.
EDIT-- Was able to figure it out after tearing it apart multiple times. Dale was correct in the fact that it flooded. I disconnected the fuel pump, cleared the motor, plugged it back in and started it. Still sounded terrible but once the plug warmed up for 30 seconds, it came back to life.
The crazy part is why it flooded. I ran the car for 35 minutes, boosted, fully warmed up. I recently replaced the fuel filter right before it flooded, but assume the stock FPR wouldnt cause the car to flood. The original fuel filter was really heavy relative to the new one. No idea when it was changed last or if ever.
Appreciate the help Dale and Ernie William from Phalanx rotary here locally in STL.
Last edited by iceman4357; Jun 30, 2020 at 02:07 PM.
