OK guys, I have done a lot of research and troubleshooting and can't seem to figure this out. Every time I think I found the problem, I drive the car and it's still there.
What's happening is I'm hitting fuel cut at 9-10psi. I disconnect the hose at pressure sensor and still hit fuel cut, electrical plug still connected.
CEL 35 pops up.
I checked the wires:
Key on engine off
VC: 4.7 - 4.9v
PIM: 2.4 - 2.7v,
wire at ecu to gnd - no continuity
GND: 2.5-3.5 ohms
Using a cigarette lighter air pump:
Apply air pressure (9 psi) to turbo pressure sensor: air pump gauge reads 12-16 psi almost instantly.
VC: 4.7 - 4.9v
PIM: 3.1 - 4.7v (voltage drops as I loosen the hose to release pressure)
Apply 12-14psi, pump gauge instantly reads 16-23psi
VC: 4.7 - 4.9v
PIM: 3.1-4.9v
Every thread I can find on MR2OC ends with billwot saying you have a short or open in the PIM circuit (several times per thread!) but I can't seem to find one and I was an electrician for 5 years! Can anyone get me pointed in the right direction? The pressure sensor, wiring, and voltage all seem to be spot on. I do have a JDM ECU I could try but wanted to exhaust all other options first.
Thanks!
What's happening is I'm hitting fuel cut at 9-10psi. I disconnect the hose at pressure sensor and still hit fuel cut, electrical plug still connected.
CEL 35 pops up.
I checked the wires:
Key on engine off
VC: 4.7 - 4.9v
PIM: 2.4 - 2.7v,
wire at ecu to gnd - no continuity
GND: 2.5-3.5 ohms
Using a cigarette lighter air pump:
Apply air pressure (9 psi) to turbo pressure sensor: air pump gauge reads 12-16 psi almost instantly.
VC: 4.7 - 4.9v
PIM: 3.1 - 4.7v (voltage drops as I loosen the hose to release pressure)
Apply 12-14psi, pump gauge instantly reads 16-23psi
VC: 4.7 - 4.9v
PIM: 3.1-4.9v
Every thread I can find on MR2OC ends with billwot saying you have a short or open in the PIM circuit (several times per thread!) but I can't seem to find one and I was an electrician for 5 years! Can anyone get me pointed in the right direction? The pressure sensor, wiring, and voltage all seem to be spot on. I do have a JDM ECU I could try but wanted to exhaust all other options first.
Thanks!