Tuning the tach 68 camaro tic toc tach

[68problemchild]

OK, on the tach:

Cranking
8
8

Reads pretty accurate at 750-850 idle. 3 was 2400 at idle. 8 is pretty much spot on.

but getting this error:


Error code: ERR_IGNORED/4
No response from vehicle.

[Taz]

Glad to hear you got it working ... ignore my inquiry in the other thread - had been curious as to which values had ultimately worked ...


Regards,
Taz

[68problemchild]

Any ideas on this new error code?

The ECM does not need the value to be 6 to work correctly does it? I put it back to 6, still getting error code.

[Taz]

G1202 & G1203 are tach output from ECM - shouldn't cause an issue - as these are output, not input values. If I recall, the original values were 2, then we tried 6 (used by LS1-B PCM) ... then fine tuned to 8 - which corrected Tach reading.

Not sure what you mean by an error code ... never tuned an E38 ... DTC code ?? Or error between modules ?? Original Tach output I believe was serial data - probably to the IPC ...


Regards,
Taz

[68problemchild]

Thanks.

I thought maybe the ecm needed this tach data to calibrate the program but if its just output, that is cool.

Scan tune says this whe I try to read now:

Error code: ERR_IGNORED/4
No response from vehicle.


Its probably unrelated.

[Taz]

OK ... error from Scan Tool, not E38 ... now I understand ... what were you trying to do with the Scan Tool when you received that error ?


Regards,
Taz

[68problemchild]

Just trying to read the car while its running. It wont read it now.

[ScarabEpic22]

Read it while running? Or do you mean scan? You cannot read or flash while the engine is running, but scanning/logging is done with the engine on. Latest software, etc?

[joecar]

+1 reading the PCM must be done with engine not running.

[68problemchild]

Yes its all updated as of last week, when it was reading.

By the way I changed tach to "9"s from "8"s and its more accurate.

All that said, I can reflash but it wont log or scan anymore. What is up? I did have the laptop plugged in. Please tell me I did not brick the controller.


Bug report

Bug report 10 2 2010.txt