Tps ground
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Tps ground
I am doing a ms2 b&g 2.92 fuel only. In early documentation the tps ground just went to ground. Later documentation has tps ground to pin 19 to help with noise. In my case the tps is shared with the factory gm pcm which all the gm grounds ground to a stud on the intake. Rather than physically solder on the gm ground to MS pin 19 I would like to just run the pin 19 ground to the stud on the intake. All the other MS grounds will ground to that stud. Does anyone see a problem with that
Re: Tps ground
The general rule is *all* sensor grounds go to a ground pin on the MS DB37 connector. And MS is grounded to the block via other pins on the DB37.
If you unplug MS, no sensor should have a ground.
The theory is if you ground a sensor to the block, it will share a high current ground which may well have some 'spikes' on it. The sensor inputs are required to measure tiny currents, and these spikes can interfere with that and give false readings.
If you unplug MS, no sensor should have a ground.
The theory is if you ground a sensor to the block, it will share a high current ground which may well have some 'spikes' on it. The sensor inputs are required to measure tiny currents, and these spikes can interfere with that and give false readings.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Re: Tps ground
I will separate them but I expect it is my limited understanding of grounds. When the grounds get to the MS pins 7 through 19 are all common and that is the part that has me not understanding why they should be separated. I am not questioning I am just trying to understand.
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DonTZ125
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Re: Tps ground
The fellows over on the Extra forum have a pretty diagram that explains why certain grounding arrangements are bad; it has to do with the current flow through the main ground wires causing a voltage offset. By grounding the various sensors directly (and exclusively) to the MS, the trivial current flow means no voltage drop and no sensor reading errors. Also - as you noted - noise can get pretty crazy on the heavy ground wires.
Re: Tps ground
Thanks, I think I getting now.