TPS and stepper motor reset without tune ecu

Reverend · 2025-07-02T02:00:01-0500

Evening all.
Just wondering if there's a way of resetting TPS and stepper motor on 2005 Rocket 3 without tune ecu just to possibly get a ride of any description out of the bike. As soon as I get on the throttle it lays down. I will get tune ecu shortly, but $1500 into it already without a ride and have mental issues

Kevin frazier · 2025-07-02T07:04:11-0500

You could do it with a multi meter, you may have a captain close to you that could hook up tune ecu and try and get ya going also. Seen that happen.

atomsplitter · 2025-07-02T09:00:04-0500

The procedures in the shop repair manual require a "dealer tool" to get the voltages set correctly. That's what TuneECU will do for you. Out of curiousity have you cleaned the fuel injectors with an injector tool (like Motion Pro)? Also you'll want to synch the throttle bodies when you get TuneECU. Unlike using vacuum guages doing it with TuneECU should be more precise (altho you can get very close with guages).

Reverend · 2025-07-02T19:13:41-0500

atomsplitter said:
The procedures in the shop repair manual require a "dealer tool" to get the voltages set correctly. That's what TuneECU will do for you. Out of curiousity have you cleaned the fuel injectors with an injector tool (like Motion Pro)? Also you'll want to synch the throttle bodies when you get TuneECU. Unlike using vacuum guages doing it with TuneECU should be more precise (altho you can get very close with guages).

I took the injectors to Mildura automotive engineering and fuel injection and had them done properly. I also asked them to test them first to see if there was an issue.... Which there wasn't

Reverend · 2025-07-02T19:16:01-0500

I thought I read somewhere last week a process but I don't seem to be able to find it

Reverend · 2025-07-02T19:18:08-0500

A dash extra info..after the last 12 minute reset it free revs ok now may splutter up top, but no go trying to ride it.

atomsplitter · 2025-07-03T08:23:02-0500

Your injectors are good from your previous post, so now it's getting the TPS and synchronization set and that should get you sorted (fingers crossed). The engine without load may run but when you add load the fueling has to be correct, otherwise no power. That's why you'll want to verify your TPS is set correctly, the idle stepper can get you started but isn't how you ride it. I have the shop manual (paper copy) and can step you thru the process to TB balancing, and primary/secondary TPS adjustments if you don't have the manual. The correct voltage for primary and seconday TPS is 0.6 volts +/- .02 volts. To ensure you haven't transposed the sensors the primary TPS has the shorter connector cable.

TURBO200R4 · 2025-07-03T10:02:59-0500

atomsplitter said:
Your injectors are good from your previous post, so now it's getting the TPS and synchronization set and that should get you sorted (fingers crossed). The engine without load may run but when you add load the fueling has to be correct, otherwise no power. That's why you'll want to verify your TPS is set correctly, the idle stepper can get you started but isn't how you ride it. I have the shop manual (paper copy) and can step you thru the process to TB balancing, and primary/secondary TPS adjustments if you don't have the manual. The correct voltage for primary and seconday TPS is 0.6 volts +/- .02 volts. To ensure you haven't transposed the sensors the primary TPS has the shorter connector cable.

Just so you understand the .62 is with tuneecu and the stepper motor fully retracted.
With out tuneecu and checking with multimeter should be around .72 volts
Hth

Reverend · 2025-07-03T17:55:00-0500

atomsplitter said:
Your injectors are good from your previous post, so now it's getting the TPS and synchronization set and that should get you sorted (fingers crossed). The engine without load may run but when you add load the fueling has to be correct, otherwise no power. That's why you'll want to verify your TPS is set correctly, the idle stepper can get you started but isn't how you ride it. I have the shop manual (paper copy) and can step you thru the process to TB balancing, and primary/secondary TPS adjustments if you don't have the manual. The correct voltage for primary and seconday TPS is 0.6 volts +/- .02 volts. To ensure you haven't transposed the sensors the primary TPS has the shorter connector cable.

Thanks heaps
I'll get my shift today and we'll work out a suitable time

Reverend · 2025-07-03T17:56:14-0500

TURBO200R4 said:
Just so you understand the .62 is with tuneecu and the stepper motor fully retracted.
With out tuneecu and checking with multimeter should be around .72 volts
Hth

Thankyou I'll get organised and have a sniff

TPS and stepper motor reset without tune ecu

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