LC1 TS and gauge mismatch

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
Forum rules
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.
Post Reply
chubbyhubby
MegaSquirt Newbie
Posts: 4
Joined: Sun Dec 19, 2010 11:06 am

LC1 TS and gauge mismatch

Post by chubbyhubby »

Hi, looking for some guidance please.

I have my car idling with the LC1 WB connected. The gauge shows AFR~13.5 which seems about right. The TS read out shows AFR9.5-10. There is ~0.999v ground to signal on the LC1 signal wire and the MS2 O2 input pin. There is ~2.1v on the Innovative Gauge input pin.

Both the LC1 and Innovative gauge share the same ground which is the same as on the OEM NB 02 sensor.

I cant leave the car to idle with the WB control active as it tries to lean out an eventually it dies.

Both devices (gauge and TS) is reading right based on their input voltages (?), hence the difference in AFR, but why should the two outputs (wires) show different values from the same sensor?

Any help would be appreciated!
chubbyhubby
MegaSquirt Newbie
Posts: 4
Joined: Sun Dec 19, 2010 11:06 am

Re: LC1 TS and gauge mismatch

Post by chubbyhubby »

Figured it out.
Classic case of 'engage brain before selecting mouth'!

Use LM Programmer from LC1 disc and reprogram both channels to be the same. One is WB and the other NB by default.
Use COM1 9600 baud and the USB-RS232 adaptor.
Post Reply