By Regretting my choices
Hello. I purchased this unit as a "non runner" with the intent of using the frame to build a go-cart, but once I got it home it seemed way to good to part out. The motor cranks over, and I have spark, but no fuel. If I put a little fuel in the cylinder it fires up until that fuel is burnt, then of course it dies. The fuel pump is not running and I have removed the plug and there is no power going to it. I have checked the safety switch on the brake pedal and its fine, I have checked the fuses, all good, but am not sure where to go from here. The shifter is missing on the unit, but the indicator light on the dash shows its in neutral, and the e-brake indicator switch is working as well. I am thinking of jumping power to the fuel pump next to see if it runs and if the motor will start.
What am I missing? What can stop the fuel pump from getting power to it?
By David Trost
Interesting problem. My Massimo runs great - but when the fuel level drops just a bit, it just stops. It restarts easily, but I have to keep my foot on the accelerator pedal. When I top it off with gas, it again runs fine. I already replaced the fuel pump, but that didn't work.
Thanks for your help!
I need help and idea's on the best options for a water tank/spray rig for a Mule Pro 6 passenger, used in the 3 passenger mode. This will be for support of prescribed burns, once called controlled burns, to clear under brush and slash after logging operations and wildfire prevention. Occasionally used to apply fertilizer, insecticide or herbicide on pasture. Also to provide supplemental water for crops, gardens/landscaping. Ideally it would be about 50 gal, with both a boom and hand held sprayer, and with a high volume pump. It would be nice to be able to suction pump to load the tank from surface water.
There are a lot of dealers, brands and units to choose from but I hope to hear from those that have some real world experience with this.
I've had my Massimo 500 for about a month. So far I'm really happy with it and until today haven't had any issues . When It was delivered, the fuel gauge had one bar so I put a couple of gallons in to get me going. Still showed one bar on gauge but I figured not enough to register. Today I thought that I'd add a 5 gal can to top off. Well, I learned that the gauge wasn't working when, you guesssed it, the tank overflowed after a couple of gallons in. Still only one bar on gauge.
I could probably figure this out by starting with the basics (checking wires , the sending unit , etc. ) but before I got a-rippin and a-tearin , I thought I might save some time and I'd check and see if anyone had already had this problem and what the fix was. This is a 2007 with the electronic dash. Everything else seems to work . Any help would be appreciated .
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By Joe Toup
There does not seem to be a lot of good sources out there for troubleshooting and diagnosing ECU problems with my Massimo Buck 400 (which is also a Bennche 400 & Cazador 400 only with different badging), so I thought I'd share some info that I found during my searches the past few days. I was trying to diagnose and repair a hard starting issue. Using the following info, I was able to figure it out. My ignition coil threw a 0351 code. I discovered how to read the codes without an OBDII code reader. The following procedures should help you check your fault codes and clear them if needed.
Fault Code Troubleshooting for Delphi MT05 ECM on the Massimo Buck 400, Bennche Bighorn 400, Bennche Cowboy 400, and Cazador 400
*NOTE: The MT05 ECU is not really OBD 2 compliant. It is much more similar to an OBDI system. I know this because I once converted a Suzuki Samurai from carburetor to a full on EFI system a while back and it had all of the same type of sensors as a Delphi EFI system. The MT05 ECU controls either 1 or 2 cylinder engines commonly found on Massimo, Bennche, and Cazador.
Much of the ECU info was found here:
https://netcult.ch/elmue/HUD ECU Hacker/Delphi MT05 Manual.pdf
Delphi EFI System Design
Delphi EFI employs 5 sensors to monitor engine performance.
1. Crankshaft Position Sensor
2. Coolant Temperature Sensor
3. Oxygen Sensor
4. Throttle Position Sensor
5. Manifold Air Pressure/Manifold Air Temperature (MAP/MAT) Sensor
Delphi EFI employs the following system components.
1. MT05 Engine Control Unit (ECU)
2. Fuel Pump
3. Multec 3.5 Fuel Injector
4. Idle Speed Control Valve (Idle Stepper Motor)
5. Multec Ignition Coil
6. Fuel Vapor Canister Purge Valve
Using the Digital Dashboard to Decipher EFI Trouble Codes
In addition to the diagnostic scan tools, you can use the engine warning light of the Siemens dashboard to diagnose EFI problems. The digital dashboard receives signals from the MT05 ECU, and the engine warning light will flash a diagnostic trouble code (DTC) if the ignition key is switched on/off for three cycles.
When you turn on the ignition, the engine warning light will illuminate, which indicates the EFI system is operational. After the engine is started, the engine warning light will extinguish if the EFI system is working properly. However, if the engine warning light remains illuminated, it indicates the EFI system is not working properly, and there is a system component failure.
Deciphering Diagnostic Trouble Codes
To read the diagnostic trouble code (DTC), open and close the ignition key three times in rapid succession, as follows: open/close—open/close—open. At this point the engine warning light will flash a DTC which indicates the fault in the EFI system. Refer to the attached fault code table to identify the corresponding problem.
The engine warning light will emit a sequence of flashing lights. If the light flashes 10 times, the translated number is 0. If the light flashes one time, the translated number is 1, et cetera. For example, if the MAP/MAT sensor is disconnected, or the connector is shorted to ground, the engine warning light will flash in the following manner (This is an example only).
The engine warning light will flash 10 times: The first number of the DTC is 0
After an interval of 1.2 seconds, the engine warning light will flash 1 time: The second number of the DTC is 1
After an interval of 1.2 seconds, the engine warning light will flash 10 times: The third number of the DTC is 0
After an interval of 1.2 seconds, the engine warning light will flash 7 times: The fourth number of the DTC is 7
The resulting DTC is P0107.
In my case, I had an ignition coil failure that threw a code. When I checked, it was in this sequence: 10, 3, 5, 1. The 10 represents a 0. So the actual code was 0351. I fixed a loose wire and rebooted my ECU using the procedures I detailed below.
If there are other fault codes, the engine warning light will flash the next code in 3.2 seconds after finishing P0107. After all existing fault codes are flashed, the engine warning light will repeat the fault codes, in sequence, until the ignition key is turned off.
To clear fault codes you need an OBDII Fault Code reader and a Delphi 6 pin connector adapter cable that you have to order from China and wait 8 weeks…or you can simply reboot the ECU using the instructions detailed below.
Rebooting the ECU
Perform the following steps to reboot the ECU.
1. Turn off the ignition for 15 seconds.
2. Turn the ignition on/off for 5 cycles. Make sure each cycle lasts about ½ second, verifying the start of the fuel pump for each cycle. If the fuel pump doesn't start during any cycle, begin the entire reboot procedure from the beginning.
3. Turn off the ignition for 15 seconds.
TPS (throttle position sensor) re-learn procedure after rebooting ECU.
This must be done after replacing the TPS or the ECU....and after rebooting an ECU! Source: ECU Hacker. Reworded slightly to make it a more sensible flow in my mind. 1. Turn idle screw one full turn clockwise before starting 2. Start engine, run at low idle until engine warms. Maybe a couple mins. 3. Idle should be above 1500 rpm. If it isn’t, turn it up to 1700 then shut engine off. Do another reboot of ECU. 4. Restart engine and let it stabilize at 1700 rpm. Then turn idle screen down to 1500 rpm and let it stabilize for a few seconds. Once it stabilizes, set to final recommended idle speed for your machine. The placard under your seat should show idles speed, valve adjustment, spark gap, etc. mine shows 1600 rpm.
5. Shit it down. Wait 10-15 second before restarting. Procedure is now complete. Final Notes:
I have included pictures of the OBDII connector and the Delphi 6 pin connector in case anyone wants to go buy your own and build a connector to use for an OBDII reader. You can do the same thing with code reading and resetting using your check engine light on your dash. But some folks want to do it with code readers.
Hope this helps some folks. I have been scratching my head until tonight on how to reset my fault codes. Then I discovered all of this on some motorcycle forums. The source for the diagrams is here:
https://netcult.ch/elmue/HUD ECU Hacker/
I am not a technician. I do not endorse any manufacturers. I am just an OCD driven old man that likes to work on my own crap. I have lots of time to figure things out. If you run into a problem that stumps you, give me a shout. I may be able to give you some ideas. Or maybe not. This system is essentially an OBDI and very simplistic. If you are methodical and patient, most problems can be figure out thru a process of elimination.