ECU ground wire questions
05-07-11, 08:51 PM
#52
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The car started out as a '86 n/a then had a full '87 TII swap done using a JDM TII harness that was re-pinned.
I looked over the NZCONVERTIBLE posts but I'm having trouble pinpointing my problem still. Was going to try adding a ground.
I looked over the NZCONVERTIBLE posts but I'm having trouble pinpointing my problem still. Was going to try adding a ground.
05-07-11, 08:54 PM
#53
Rotary Freak
I'd go get a meter out and go to the boost sensor. Unbolt it and turn it up where you can backprobe the BROWN/RED wire with the meter. Leave the plugs all connected up. See if when the key is ON whether or not you have approx 2.7 vdc give or take a touch.
Deja vu all over again.
Deja vu all over again.
05-08-11, 05:19 AM
#58
Rotary Freak
You do know abouit fuel cut don't you? If the boost is too high on a stk turbo the ECU will cut the fuel to a rotor to protect the motor. That's why they make fuel cut defenders.
You probably know, but just in case I wrote that above. I think boost over eight psi will cause fuel cut.
You probably know, but just in case I wrote that above. I think boost over eight psi will cause fuel cut.
05-08-11, 12:03 PM
#60
Rotary Freak
I'd go look at the volts dc on the brown/red wire in the boost sensor with the connector on the sensor. Key to ON. See if your reading reads like the manual. I THINK it's 2.5 to 2.7 dc with key ON engien OFF.
Fuel cut happens when the sensor outputs???? Ive forgotten the exact figure. I believe 3.65 vdc. The wrong sensor for your car might output this high a volage waaay too soooon. Possibility. NOt a big possible but possible.
Fuel cut happens when the sensor outputs???? Ive forgotten the exact figure. I believe 3.65 vdc. The wrong sensor for your car might output this high a volage waaay too soooon. Possibility. NOt a big possible but possible.
05-08-11, 03:09 PM
#61
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I checked the boost sensor and it reads 2.4 DCV.
I added the ground at the boost sensor, and zeroed in my TPS.
I took it around the block, and the bucking is less severe, although it may be impart to the car now hitting a brick wall when the secondary injectors are supposed to kick on.
Where would I start troubleshooting the infamous secondary injector hesitation?
I added the ground at the boost sensor, and zeroed in my TPS.
I took it around the block, and the bucking is less severe, although it may be impart to the car now hitting a brick wall when the secondary injectors are supposed to kick on.
Where would I start troubleshooting the infamous secondary injector hesitation?
05-08-11, 04:48 PM
#62
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I came across https://www.rx7club.com/showthread.p...rpm+hesitation
I pulled my hose off my boost sensor and plugged it, then unplugged my TPS. (to try and simulate load) I hope I did it right.
When I did that, the car revved rather normal. There was a slight hesitation at 3500, but a little more throttle pushed the RPMs right along.
Where should I go from here?
I pulled my hose off my boost sensor and plugged it, then unplugged my TPS. (to try and simulate load) I hope I did it right.
When I did that, the car revved rather normal. There was a slight hesitation at 3500, but a little more throttle pushed the RPMs right along.
Where should I go from here?
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befarrer
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08-22-15 05:52 PM
