Switch from code 59 to 12P

American Delco GM ECUs and PCMs, ALDL, OBD 1.5.
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Joined: Sat Feb 28, 2009 8:38 pm
Location: Wellington NZ

Re: Switch from code 59 to 12P

Postby delcowizzid » Sat Mar 09, 2019 7:45 pm

98 is fine most of the ones I do at lower levels is around 102kpa .vl400 the guy that wrote the code would be able to answer your questions better he can read the matrix better than most lol.hiw did you feed the baro 1 bar power and earth .does it run properly without shutting off now it's using the 3 bar for baro at key on .the 1 bar baro bar sensor was added cause someone wanted to try use the ecu for flight I don't know how many people actually use it to find any bugs
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem

Posts: 78
Joined: Mon Dec 31, 2012 4:54 am
Location: LasVegastan

Re: Switch from code 59 to 12P

Postby 34blazer » Sun Mar 10, 2019 8:40 am

Hey DW

I used the 5v reference from pin C14, and the ground is tied in with the other sensor grounds.

So I've narrowed it down to the "Use VE multiplier table for VE baro adjustment, clear= use altitude adjusted MAP for vacuum VE lookup"

Using the 2nd baro and update during run bits with the VE mult baro table, the indicated MAP readings drop down to almost zero for a split second which causes a lean condition, at idle it will disable CL idle, and everywhere else it just cuts the fuel delivery.

I deselected the use 2nd baro bit, still occurred
Deselected the update during run bit, still occurred
But once I deselected the use VE mult.....bit, no more random blips in the MAP.

I watched the baro voltage and it stays Rock solid the whole time.
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Posts: 78
Joined: Mon Dec 31, 2012 4:54 am
Location: LasVegastan

Re: Switch from code 59 to 12P

Postby 34blazer » Fri Mar 15, 2019 3:42 am

I have a question about knock counts and KR. When the engine gets into boost the log shows up to 6* KR at times, but on the knock counts histogram it's showing zero. I've verified that knock counts works by tapping on the engine lightly with a hammer, same with KR.


Why is it showing KR but no knock counts?
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Posts: 78
Joined: Mon Dec 31, 2012 4:54 am
Location: LasVegastan

Re: Switch from code 59 to 12P

Postby 34blazer » Fri Mar 15, 2019 3:23 pm

Hmm, apparently I missed the knock counts at first glance, found out where they were occuring.

If anyone has any information on the C20GET/LT3, I'd like to get some tuning notes from them. So far I only know of one person pushing this engine and they are running E85, so their ignition table is much more advanced. I'm running 91 with water/methanol
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