Which software version does it have? If it is earlier than C02C I would recommend getting the ECU updated. Bob Price can update it.
Before you try to start it read "Tony's Ram 500 Tips"
http://www.jetpilots.org/PDF%20files...M_500_Tips.pdf
Ram 500's can be difficult to start, however once started they run fine. Mine has the latest software, C03. Here is what works for me:
- Fully charge the ECU battery before starting.
- Fill the gas bottle 10-15 minutes before you start to allow the gas temperature to come up to ambient temperature, or warm up the bottle in your hands for a few minutes after filling. Some guys have had better luck with a larger gas bottle, like the Jetcat one.
- Make sure that the glow plug has two coils pulled out.
- With a McCoy #9 plug I set the glow plug parameter to 55. If you use a Rossi plug you will need more voltage, about 45 should work. If it is cold out you might want to decrease the value by 5 or so. A lower number gives higher voltage. If you have the older software levels that start with an A or B the glow parameter works opposite, a higher value gives more voltage.
- Set the gas adjust parameter to 10 - 15 less than the ambient temperature. The lower the value the more propane it lets in.
- The Start PW parameter should be set to 5 less or equal to what the pump PW reading is at normal idle. This value can vary depending on how strong your fuel pump is and your fuel tank set up. 105 works on mine. If it is not ramping up on kero then increase the number. If you are seeing flames shooting out the back then lower the value.
I have put well over 100 starts on mine and done a lot of experimenting with the start parameters. Even with the above I can get a good automatic start about 50% of the time. What works every time with the above is to leave your Powermax can connected and give it an extra squirt of gas a few seconds after it lights off.
I plug in my data terminal for each start. It always lights off fine. Then I watch the EGT. If I see the temperature start to drop off then I give it a little squirt of gas and then it runs up fine. As stated above I need to do that about half the time.
Good luck. let me know if you have any questions.
Joe