Heavy throttle from a stop - Timing goes to ZERO (or negative!) - what's going on?
#1
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Swapped a LS2 24x into a 1970 Chevelle, having an issue where when you take off a little hard the engine almost dies (the harder you take off the more the engine wants to die). Scanning it with HPTuners, I can see that the timing drops to zero the same time this issue occurs.
Anyone know what this could be?
Scan file and tune attached
Anyone know what this could be?
Scan file and tune attached
#10
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This is an SD car only, so it doesn't have a MAF
How do you know the VE table needs work? We've been trying to get it dialed in, but after doing paste special - 1/2 percentage, the car goes super lean, and I know the numbers are right (only taking out about 2% from VE results in a 15% lean..) not sure what is going on. That is a whole different issue though..
#11
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#15
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IATs are high, probably due to it pulling in all/or some of the heat from the radiator, but it was also 110 degrees outside that day..
#16
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I think we didn't run into this problem until I did a 4L80E segment swap on the PCM. I need to really dig into the transmission settings and see what can be pulling timing. I think that is where it will be
Does anyone know if Timing can be affected if AFR is way off? If engine starts to die, could the PCM be telling it to pull timing via an idle parameter or something?
Does anyone know if Timing can be affected if AFR is way off? If engine starts to die, could the PCM be telling it to pull timing via an idle parameter or something?