Lets talk about my KR (update 11-28) - Page 5 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 10-08-2007, 07:42 PM   #41
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Ryan just sent me an email, saying kinda what andrew said. He said try swapping PCMs, and MAF'*. And then get back to him.
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Old 10-08-2007, 08:12 PM   #42
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If that 29* was at WOT then you do have an issue... The 95'* should see 19-20* Max at WOT...

I agree.... swap the parts out and try again

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Old 10-08-2007, 08:24 PM   #43
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Dont worry i know Don. When i saw that i did one of these . Also look at that open loop run... what was it 22 degrees the whole time. I always see 19. But today it is 22 . Just random stuff like that.
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Old 10-12-2007, 07:42 PM   #44
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Not the pcm. Today after work, i stopped by the garage and swapped pcms. Drove around and then scanned. Exactly the same thing. I will swap MAF'* this weekend also but i am leaning towards tuning.
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Old 11-23-2007, 10:20 PM   #45
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Figured i would give an update on this.


Ryan did me a custom pcm. It arrived today. I put it in and let the car get up to normal temp (189 degrees). I gave it a quick rev and say the normal 15 degrees of kr. I know it isnt driving or whatever but it kinda broke my spirits. So i am going to wait for a decent day where i can go WOT. (been snowing lately and may be alittle while before they get it cleaned up). But i will keep everyone updated.



Ryan told me that he took away timing in key areas to narrow it down the real or false kr. He wanted me to try it and report back to him.

But i did notice the IPW'* were right at 22 when i went wot. That would be showing them maxing out. I do have a set of L67 injectors coming, so those are going to go in and i am going to have them tuned in. Then it is just back to the drawing board again
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Old 11-23-2007, 10:27 PM   #46
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L67 injectors? From what year?

Hope not S2. You'll have a really tought time with those. Even S1 L67 injectors are going to be way over a practical increase, and I really don't see you outflowing yours. You may have a PCM issue still. I'd love to see you swap PCM'* with another member with a known-good unit.



Your PCM needs time to 'learn' a few things. Have patience.
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Old 11-23-2007, 10:31 PM   #47
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I swapped pcms with my black bonneville which i knew was good and it didnt change anything. So that is why Ryan suggested his idea.

I am trying to be patient just seems like god is agaisnt me being NA .



As for the injectors, yea they are S2. I know they are wayy overkill but i got them very cheap. Any ryan said that he can tune them in easy. As for outflowing stockers, i wouldnt think i am but the ipws are showing them to be outflowing. Even though i have heard that the pcms ipws through a scanner are not very accurate and you can go to 25ipws but i dont want to rule out any posibilities, and like i said they were cheap enough i couldnt really go wrong.
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Old 11-23-2007, 10:38 PM   #48
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You'll cause yourself more problems simply by introducing another variable into the system. Your injectors are 21lb stock? Going by memory here. 36lb S2 L67 injectors are RIDICULOUSLY oversized for your application. Even if they were tuned right, what'* the point?

What are your LTFT'* and STFT'*? That'll tell you if you're having injector issues. There'* NO WAY you are outflowing stock injectors. How about swapping in a known-good set of six injectors that are correct for the L36 in case one of them is flowing LOW.

Check your plugs again too. You should be reading them on a regular basis.
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Old 11-23-2007, 11:12 PM   #49
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I have tried 2 sets of injectors besides the ones in (stock sets). When it all pans out the scans are just about exactly the same as for fueling. I have sent them all to ryan, and he is the one that suggested my injectors were close to maxing out.
(as for the bigger injectors, i do have some far out in the future plans that may somday require injectors this big with this build, well not real far out but after i get things running the way they should be)

Last time i scanned my LTFT were +10 and STFT were 128.
Injectors were 21-22 ipws
O2s were high 700'*-low 800'*

To me it was calling for more fuel somewheres.



I truely dont know. When it comes to tuning that is my weakness. That is why i am relying on what i read, ryan, and peoples' input.


As for plugs, i will pull them tomorrow and take a look at them. I havent really been driving the car lately and probably havent even put 1000 miles on these plugs, maybe not even 800 miles lol.
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Old 11-23-2007, 11:52 PM   #50
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Get some good pics of those plugs, TJ. Number them as you take them out.
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