LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What the hell is going on with my car? (datamaster files inside)

Old May 26, 2003 | 08:34 PM
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What the hell is going on with my car? (datamaster files inside)

http://www.acaenterprises.com/upload...stermemday.zip

if you check out the run one, i took the car up to 6100, first time ive had it over 5.5k. it felt weird when it was up there, and if you look it throws dtc code 11 right when i am starting to accellerate going up to the 6100 peak. MIL code? wtf is that?

also after that, the car has been trying to stall alot when stopping and coming to idle. doesnt do it everytime, but before tonight it never wanted to stall.

any idea what all the knock retard is from? and lastly, anyone have any clue how to work the quarter mile and dyno calculator in datamaster? keeps giving me like 40 second times hehe

also, i have a pcmforless base tune in there now. and the car was running great before i took it to 6100rpm.....
Old May 26, 2003 | 10:38 PM
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Don't know what's wrong, but hopefully you get it fixed ... TTT for ya
Old May 27, 2003 | 12:55 PM
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ttt
Old May 27, 2003 | 04:01 PM
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Not an expert at this stuff, but it does look like your IAC counts are a bit high. That would mean that it is trying to let in more air to compensate for too much fuel.
You seem to have a lot of spark retard even when the knock counter is not incrementing.
Sorry, I don't remember what cam or engine mods you have.
Old May 27, 2003 | 04:15 PM
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230/236/112, ported heads, stock tb
Old May 27, 2003 | 04:31 PM
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Originally posted by thewinner
230/236/112, ported heads, stock tb
From what I have read, sounds like you might want to crack open the throttle blades to let a little more air in. Just enough to get your IAC counts back down to the 40 or less range. That's not going to be a fix for all your troubles, but would be a step in the right direction, I think.

I am still a relative newbie at logs and tuning.
Old May 27, 2003 | 04:39 PM
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the TB elbow is torn a little bit where it goes up on the throttle body, however that shouldnt make a difference since its only on the clamping surface and the clamp should seal it back up. either way ill probably get a new elbow sometime soon. is the trickflow elbow the one without the divider in the middle?

also, i am at 5200-5800 ft so that will explain the low injector DC and some other stuff
Old May 27, 2003 | 05:01 PM
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What injectors are you using? Your BLMs are not so great.
Old May 27, 2003 | 05:02 PM
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BTW, code 11 is Fuel System LEAN.

List your fueling mods.
Old May 27, 2003 | 05:14 PM
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11 is Malfunction Indicator Lamp Circuit fault. 55 is the Lean fuel one. if you look at the run scan, at record 656 the code pops up along with a data error.

fuel system is stock.
Old May 27, 2003 | 05:19 PM
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Originally posted by Tech
BTW, code 11 is Fuel System LEAN.

List your fueling mods.
Where did you get that code? My book says it's the MIL (SES) circuit.
Old May 27, 2003 | 05:33 PM
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11 IS mil fault.
Old May 27, 2003 | 05:53 PM
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**** now that i think about it, there is a sucking noise coming near the TB so it could be the elbow..... but why would it start being crappy now? it tear bigger maybe?
Old May 27, 2003 | 06:39 PM
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Originally posted by thewinner
**** now that i think about it, there is a sucking noise coming near the TB so it could be the elbow..... but why would it start being crappy now? it tear bigger maybe?
Since you know you have a problem there, just get 'er replaced.
Old May 27, 2003 | 07:02 PM
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well drove the car again, never tried to stall out except for once in the driveway....and it did stall.

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