Low RPM wot stumbling
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Low RPM wot stumbling
I have my tune dialed in fueling wise better than it's ever been before. I was able to get the VE dialed in +/- 4 and the MAF +/- 2%. Car drives phenomenally.
I am having some issues low rpm when I hammer the throttle in 2nd and 3rd gear. My fueling appears to be dead on but it is not making much power.
I am getting 13.0 a/f across the board wot and 26* advance.
Is this too rich for those low of rpms? What else can I try?
I am having some issues low rpm when I hammer the throttle in 2nd and 3rd gear. My fueling appears to be dead on but it is not making much power.
I am getting 13.0 a/f across the board wot and 26* advance.
Is this too rich for those low of rpms? What else can I try?
#2
Those kind of stumbles are usually timing related
However, even if fuel is dialed, all engines need a lot of fuel in rapid throttle transitions like idle to wot. Think of it like a carburetor's accelerator pump
If the engine does not get enough fuel it will stumble. Combined with a timing curve not properly dialed will make the hesitation much worse
However, even if fuel is dialed, all engines need a lot of fuel in rapid throttle transitions like idle to wot. Think of it like a carburetor's accelerator pump
If the engine does not get enough fuel it will stumble. Combined with a timing curve not properly dialed will make the hesitation much worse
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Ok it looks like the timing is like 16* +/- around that w/ fueling 12.7-13.0. Once it goes through the low rpms the timing goes to 25s and it takes off.
Should I just set the timing aorund 25* all the way through there or is there a reason it is so low.
Also, In the low rpms in 3rd and 4th gear if you floor it, it sounds almost like its knocking. Drives perfect everywhere else though.
Should I just set the timing aorund 25* all the way through there or is there a reason it is so low.
Also, In the low rpms in 3rd and 4th gear if you floor it, it sounds almost like its knocking. Drives perfect everywhere else though.