Tankerpilot75
Well Known Member
I bought my RV7A two years ago this coming April 3rd. I had a long list of squawks at time of purchase that I've slowly been working my way through. The last item on the list was repair/replacement of an inaccurate fuel pressure sensor.
Several VAF members helped me try to get the original VDO 80 psi fuel pressure sensor working by custom adjustment of my EIS auxSF and auxOFF settings but that led no where. From that exercise I figured out the old sensor was toast and needed replacement.
I called GRT and ordered a new HPS-SS-01 fuel pressure sensor. They priority mailed me one and a week later I installed it. Unfortunately I couldn't get the appropriate readings on my EIS and after struggling for two days called GRT tech support. Several hours on the phone with Eric doing various tests confirmed my new sensor was bad. Sometimes even new equipment can be defective so they priority mailed me a new one. That added another two work days plus a weekend to my journey.
The new sensor arrived Monday and Tuesday I was back at the hangar (an hour's drive from my house) to install the new, new sensor. This time I was extremely careful installing the sensor and new connections Testing all connections for continuity and proper voltage. I once again powered up the EIS only to have incorrect AuxOFF readings. The EIS also shut down after a few minutes. I struggled again for two days second guessing what I could be doing wrong, finally gave up and called GRT tech support once again for help. Eric again was very helpful and we went through more checks not believing a second sensor could also be bad.
Finally Eric had me read him the model number of my latest sensor. That model number sparked both of our attention a little bit because it indicated a 4.5v sensor and I was powering it with the 12v line out of the EIS. Eric said he wanted to check something and would call me back within 30 minutes.
Guess what - I had been sent two incorrect sensors. Both were 4.5v sensors when I should have received an 8 - 30 volt sensor. I was literally frying the sensors with the 12v line feeding it which is why the EIS would shut down after a few minutes. It seems GRT had gotten the wrong voltage sensor from their supplier.
They are now ordering a new batch of sensors and have quarantined their current supply. I will say throughout this ordeal GRT has been very attentive to service and customer support. It's unfortunate they got in a bad batch of sensors and for me it's been a real challenge and time consuming effort to figure out. What I expected to be a half day job has turned into a two week effort and the plane is still down awaiting the correct part. Such is the life of an RV owner!!
Several VAF members helped me try to get the original VDO 80 psi fuel pressure sensor working by custom adjustment of my EIS auxSF and auxOFF settings but that led no where. From that exercise I figured out the old sensor was toast and needed replacement.
I called GRT and ordered a new HPS-SS-01 fuel pressure sensor. They priority mailed me one and a week later I installed it. Unfortunately I couldn't get the appropriate readings on my EIS and after struggling for two days called GRT tech support. Several hours on the phone with Eric doing various tests confirmed my new sensor was bad. Sometimes even new equipment can be defective so they priority mailed me a new one. That added another two work days plus a weekend to my journey.
The new sensor arrived Monday and Tuesday I was back at the hangar (an hour's drive from my house) to install the new, new sensor. This time I was extremely careful installing the sensor and new connections Testing all connections for continuity and proper voltage. I once again powered up the EIS only to have incorrect AuxOFF readings. The EIS also shut down after a few minutes. I struggled again for two days second guessing what I could be doing wrong, finally gave up and called GRT tech support once again for help. Eric again was very helpful and we went through more checks not believing a second sensor could also be bad.
Finally Eric had me read him the model number of my latest sensor. That model number sparked both of our attention a little bit because it indicated a 4.5v sensor and I was powering it with the 12v line out of the EIS. Eric said he wanted to check something and would call me back within 30 minutes.
Guess what - I had been sent two incorrect sensors. Both were 4.5v sensors when I should have received an 8 - 30 volt sensor. I was literally frying the sensors with the 12v line feeding it which is why the EIS would shut down after a few minutes. It seems GRT had gotten the wrong voltage sensor from their supplier.
They are now ordering a new batch of sensors and have quarantined their current supply. I will say throughout this ordeal GRT has been very attentive to service and customer support. It's unfortunate they got in a bad batch of sensors and for me it's been a real challenge and time consuming effort to figure out. What I expected to be a half day job has turned into a two week effort and the plane is still down awaiting the correct part. Such is the life of an RV owner!!
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