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Old 12-13-2009, 12:52 AM   #1
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Default Mspnp install on 91 1.6 tuning help

Don't want to waste anyone's time, This thread can be deleted...

Last edited by flash13783; 12-13-2009 at 01:51 PM.
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Old 12-13-2009, 06:23 AM   #2
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Dude, first:

Learn how to type.

Second, you cannot tune your car without a wideband safely.

Third, why would you lie to your ecu? If your timing isn't 10, why would you put in 10? It's a computer. You put crap data in, and you get crap output.
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Old 12-13-2009, 01:30 PM   #3
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I have a wideband. I don't know how to tell the ecu to read it. That's why I am on here asking for help. As for setting it to 10 that's wat all the instructions say to do. That's supposedly how u sync the timing of the car with the timing in the ecu.
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Old 12-13-2009, 01:31 PM   #4
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I vote . There is a really cool thing on this site, it's called search.

-Rouphis
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Old 12-13-2009, 01:38 PM   #5
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Old 12-13-2009, 01:47 PM   #6
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Thanks for the help i appreciate it. Sorry for asking for help.
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Old 12-13-2009, 03:48 PM   #7
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So you have a car, then you changed it... how would the manual know that?

If you swapped out the engine, would you still follow the directions of what the manual said?
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Old 12-13-2009, 04:09 PM   #8
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no but thats why i got on here. i just read the complete manual. I found out i need to re load the firmware cause i did the afm delete. As far as the timing from what i read it doesnt matter if i advanced it or not. When i set the the fixed angle to 10 that wat it is with the stock computer, and thats why i check the timing then to make it stock and sync it with the mspnp so they match. Then set it back to -10. hopefully the car will run right after i do this.
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Old 12-13-2009, 04:21 PM   #9
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Hopefully.

Also, RTFM.

Also:

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Old 12-13-2009, 04:44 PM   #10
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Wow! Just when I thought you were going to actually try to help me.

(Let me make sure I proof read my post before I post... It's kinda hard to be grammatically correct when I'm posting with an iphone)
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Old 12-13-2009, 04:54 PM   #11
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You got your first to do, really: Stop lying to the computer. Provide it with good data and it will do its job well.

As far as the wideband setup, this is from the instalation manual:

Wideband oxygen sensor

The MSPNP can work with many aftermarket wideband sensor systems such as the Innovate Motorsports LC-1 which is the system we recommend for ease of install and use. You will need to connect the MSPNP to a programmable analog output from the wideband sensor’s controller, and install the controller according to the manufacturer’s directions. You should ground the wideband to the engine block near the factory ECU ground wire to ensure an accurate signal.

There are two ways of connecting the controller to the MSPNP. You can either connect the analog output to pin 10 of the MSPNP center connector, or you can cut and splice the oxygen sensor signal wire to the analog output. If you use pin 10 for wideband input, you must disconnect the stock oxygen sensor. Do not ground the oxygen sensor wire if you disconnect it; leave it completely unconnected and taped off if necessary (make sure it can’t short to ground or anything else).

After connecting the wideband sensor controller, you will need to change a few settings on the MSPNP. Section Four has the details of how to change this.

This is section four that it references:

Wideband oxygen sensors

MSPNP supports many common wideband oxygen sensor systems, including the Innovate Motorsports LC-1 / LM-1 line (LC-1 is our wideband of choice) and most other systems that provide a programmable analog voltage output. There are a few changes needed to the software settings to make in order to properly display and use the wideband sensor input.

To make MegaTune display the output correctly, select Configurator from the MegaTune Program’s File menu, or from the MegaTune group in your Start Menu. This will open up the configuration program. You will see a list in the left hand column of the Configurator that starts with MegaTune2.25 and then includes a list of project cars. The project you will use is either “MSPNP MM9093 with AFM” or “MSPNP MM9093 without AFM”, depending on whether you have kept the factory AFM or removed it and used a GM style IAT sensor. Click the plus sign in a box next to the project to expand the options under this one, then expand settings.ini, and then expand Settings.



Then select LAMBDA_SENSOR. You will see a menu of aftermarket wideband controllers at the right. Select the one that corresponds to the controller you will use. The LM-1 default will use the INNOVATE_1_2_LINEAR if you are using its default volt meter settings, while the LC-1 will use the INNOVATE_LC1_DEFAULT settings if you have not changed its outputs. Note that the Innovate products and many others have programmable outputs, and these options are simply for the default configuration. Adjusting the LM1 to use a wider range of output voltages, such as setting it to give 0 volts at 10:1 AFR and 5 volts at 20:1 AFR, will reduce the effects of noise in the input. This is recommended for best performance though you will need to program your LC-1 or LM-1 outputs to match, that’s easy though. Once you have specified the wideband settings, go to the File menu and select Save. Then you can run MegaTune and have it display the correct air-fuel ratio.

Once you have set the Configurator for the sensor, you will need to change a few settings in the MegaSquirt’s memory using MegaTune. You will find most of these in the Exhaust Gas Settings option under the Basic Settings menu. You will need to set the EGO Sensor Type to Wide Band, and change the EGO Switch Point to the voltage that your controller sends for a 14.7:1 air fuel ratio. The MegaSquirt will try to maintain this air-fuel ratio when running in closed loop mode. The Controller Authority setting limits how much it can change the amount of fuel delivered, so that a faulty sensor can only cause the engine to be off by a small amount.

The Open Loop Mode settings under the More Settings menu regulate when the MegaSquirt will start ignoring the oxygen sensor input. Unless you have modified the MSPNP to use a potentiometer TPS, you will need to set this to KPa. This lets you turn off the oxygen sensor correction above a given manifold pressure.

However, if you have a wideband oxygen sensor, you do not need to turn off this correction at full throttle like a factory ECU. Instead, you can make MegaSquirt target a lean air-fuel ratio while cruising, and go to a rich air-fuel ratio under boost – and have the oxygen sensor help you target both. To enable this, select Lambda AFR Settings from the More Settings menu, and turn on the 8 x 8 AFR target table for VE Table 1. Once this is on, you can go to the AFR target table and set your targets as a function of manifold pressure or boost and RPM. The values in this target table will be the raw voltage output from the oxygen sensor controller, not actual air-fuel ratios.

MegaTune is also able to tune the VE tables on its own, based on inputs from a wideband sensor. This feature is called AutoTune. The software will adjust the VE tables in a limited range to make the air-fuel ratio match your target settings. Use this feature with caution and make sure your targets and sensor readings are correct before you enable it. You will usually still need to do fine tuning by hand. You should not rely entirely on AutoTune mode to get your car in tune.
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Old 12-13-2009, 05:44 PM   #12
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I read this, and have done it. I'm still getting 17.1 a/f at idle, and after doing everything it says to do the car is just idling really rough...
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Old 12-13-2009, 05:47 PM   #13
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Read the section of the manual regarding tuning, and then get to work.
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