Issue with 165 ECM and injector PW

American Delco GM ECUs and PCMs, ALDL, OBD 1.5.
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Issue with 165 ECM and injector PW

Postby 34blazer » Tue May 21, 2019 3:30 am

Hi again

I've recently switched to Siemens deka 80# injectors. Now I'm having an issue with the AFRs going lean starting at 180kpa. Fuel pressure climbs as it should. I've had to add so much PW that the injectors are static before the AFRs are back in the 11.0 range.

I have the 1227165 ECM and have read that those have had issues with the injector drivers. Is there a PW limit I'm reaching?
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Re: Issue with 165 ECM and injector PW

Postby delcowizzid » Tue May 21, 2019 10:26 am

Are they genuine seimens the market is flooded with chinese fakes now
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem

Posts: 107
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Re: Issue with 165 ECM and injector PW

Postby 34blazer » Tue May 21, 2019 10:35 am

Yep, I checked them over before installing.
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Re: Issue with 165 ECM and injector PW

Postby 34blazer » Tue May 21, 2019 10:21 pm

Anybody ever heard of the injector driver in the 165 having issues with certain high Z injectors?

Seems slow in here lol
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Re: Issue with 165 ECM and injector PW

Postby delcowizzid » Tue May 21, 2019 10:48 pm

I run 60lb seimens on them just fine .you don't accidently have the tune setup in single fire mode it will cut flow in half maybe post up your tune or pm it to me if you want me to have a look over it
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem

User avatar
Posts: 4895
Joined: Sat Feb 28, 2009 8:38 pm
Location: Wellington NZ

Re: Issue with 165 ECM and injector PW

Postby delcowizzid » Tue May 21, 2019 10:48 pm

And a log of the issue
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem

Posts: 107
Joined: Mon Dec 31, 2012 4:54 am
Location: LasVegastan

Re: Issue with 165 ECM and injector PW

Postby 34blazer » Wed May 22, 2019 2:21 am

I'll post up the tune a little later.


Just looked at the log and single fire is not active at all, also double checked in the calibration.

In 8D there is a PW limit that needed to be fixed.

Is that the same for this fuel strategy?
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