E30ls1

[Reyhan335]

good news, i called the guys at texas speed. they said they will buy my pcm back and and switch over the tune to my new pcm.

[Reyhan335]

If it wasn't for the pic showing the PCM ur using, my next suggestion was to try another known good PCM since yours might have been fried.

Thank you man


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[Q8y_drifter]

so what do y'all think? when i get this new computer. do y'all think it'll start?

If it wasn't for the pic showing the PCM ur using, my next suggestion was to try another known good PCM since yours might have been fried.

[Q8y_drifter]

Correct. The PCM and engine don't care about year up to about '04ish.

However, the harness must be wired correctly for the PCM (or PCM must be correct for the way the harness is wired).

Yeah I'm aware. I was replying to his question on whether or not the engine itself (being a 98) matters :)

[Reyhan335]

so what do y'all think? when i get this new computer. do y'all think it'll start?

[The Dark Side of Will]

It shouldn't matter.

Correct. The PCM and engine don't care about year up to about '04ish.

However, the harness must be wired correctly for the PCM (or PCM must be correct for the way the harness is wired).

[Q8y_drifter]

Wow looks like the Po for the computer lied too.... So now I have a tuned 97-98 ecu? And I need 99+?

Does it matter if the motor is 98?


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It shouldn't matter.

[Reyhan335]

just 2 day shipped a pcm from the PSI harness website. it won't be tuned but it'll turn the car on.

https://www.psiconversion.com/products/pcm-programming/PCM-1003.html

[Reyhan335]

Wow looks like the Po for the computer lied too.... So now I have a tuned 97-98 ecu? And I need 99+?

Does it matter if the motor is 98?


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[Q8y_drifter]

97-98 PCM



99+ PCM

[Reyhan335]

Hold on.. what PCM is that? 97/98 F-Body?

The harness needs a 411 or 896 PCM (99+ LS1) since the pinouts are completely different.

It's an 01 fbody computer
And the motor is a 98 ls1

I bought the computer when I thought the motor was a 2001. But then found out Po lied to me.

But I found out that the 2000-2001 are better to have on these motors


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[Q8y_drifter]

BTW here's the pin outs for future reference

97-98 PCM

http://lt1swap.com/1998_ls1_pcm_pinouts.htm

99+

http://lt1swap.com/2001_PCM_CONN_PINOUT.htm

[Q8y_drifter]

Hold on.. what PCM is that? 97/98 F-Body?

The harness needs a 411 or 896 PCM (99+ LS1) since the pinouts are completely different.

[The Dark Side of Will]

I don't have a pinout in front of me, but basically, you should be able to pull the connector off the ECM, then turn on the key and see +12V at the pins specified in the pinout.

If not, follow those wires until you find something wrong.

There should also be a "keep alive" hot at all times +12V wire for the ECM to use to retain idle learn settings and fuel trims. If this isn't supplied, the computer may not turn on correctly when the key is turned on.

[Reyhan335]

Connected the obd2 port and nothing. The ECM won't turn on. There's power on the harness. And relays.

Relays are clicking. There's power to all the fuses. I checked power on the coil switch and there's power there. But even with the ignition on the obd2 port should work. What am I doing wrong for the computer to not get power




My grounds



And one more on the other side from body to block




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