For anyone running any sort of EFI in your plane, you probably have an AFR Gauge (O2 Gauge). Like me, many of you probably use the PLX Devices AFR set up. Well, their customer service has completely gone down the wayside.
First, the history: Upon initial fire up about 2 years ago, my gauge did't work correctly. Had to pull out the amplifier box from under the panel and send it in for service. That took almost 2 months.
6 Months later, gauge stopped again, this time testing showed it was the gauge itself, had to pull it from my panel and send it in... took a month.
Also note, that as of about 6 months ago, you can't call technical support, they ONLY do tech support via email and it takes a full day to get a response... so good luck if you're trying to troubleshoot in the hangar...
Typically, I get about 30-40 hours out of a Bosch O2 Sensor. Mainly because of running a little rich to keep cool on climb-outs etc. Now that I'm running leaner, I'm getting longer wear. I typically expect to change the sensor as part of my oil change.
About 5 months ago, I decided to upgrade to the newer system running the newer software which, for one, allowed me to use the LSR 4.9 O2 sensor which supposedly would last longer. Also, I could have it send info wirelessly to my phone (kind of a novelty)...
First of all, as a returning customer, they offered NO discount or deal to upgrade to the new system....
Got the system installed. Fired it up, and the gauge did what it normally does, went all the way to "Lean" then showed "Air".
First flight was a 3 hour flight to Heber, Ut, from San Diego. About an hour in, I noticed the gauge reading 14.3 no matter what I did with the mixture. Thought this was odd, but I know my set up well enough now that I can really fly without that info.
Flight home a week later showed the same thing.
I contacted PLX since this was less than 30 days from purchase. I felt confident it was a bunk Bosch sensor. They gave me a list of tests to perform. Due to schedule and travel it took me 2 months to get a chance to pull the cowl and spend a couple hours doing the various tests. Which, proved it WAS the sensor.
I sent all the info to PLX and they verified it was the sensor. So I said "Great, send me a new one and I'll send this one back".... No doing... They claimed they do not cover the sensor under ANY type of warranty. They offered me a $5 discount on a new one (That's less than 10%)... I argued with them at length over 20 emails that since they sold the sensor and it was essentially bad right away, they should replace it... Nope....
Called Bosch: PLX is not an authorized dealer, so they couldn't warranty it. If I had bought the sensor from Amazon, they would cover it....
Opened a case with BBB thinking MAYBE they will step up and do the right thing... again, they spent A LOT of time fighting me and now have a blemish on their record since it's unresolved.
Now, I know what you're thinking, it's a $55 sensor.... just buy a new one (I did and it worked fine)... it's not the point... after all the running around I had already done with this company, I wanted to hold them accountable at least ONCE.
If the sensor had lasted even 10-15 hours, I would have chalked it up, and moved on.
I have posted my experience on every open forum possible and every car review forum I use....
Since then I have converted over to a system from Allen at 14.7. (14point7.com) He's VERY knowledgable, the system was a drop in replacement, it's slightly less expensive than the PLX system and he offers great customer service. He even asked me to send him a used sensor so he can analyze how the leaded fuel affects it to see if he can make them last longer.
For now I kept the same PLX gauge because it works with his system and looks pretty good. He does have one the exact same size that will drop in the same mount hole.
Do yourself a favor: DO NOT DO BUSINESS WITH PLX!!!