I can work on this after school and ill take some more logs.
Why is there no tables dealing with acceleration enrichment? Or pump shot?
I can work on this after school and ill take some more logs.
Why is there no tables dealing with acceleration enrichment? Or pump shot?
If you don't "notice" your engine dropping 100+ ftlb, then it may well be that the PCM may be miscalculating the value for TRQENG... (I said may a few times...).
For an experiment, try bumping up the shift pressure curve at around 200+ ftlb and do a test drive.
There is PE vs RPM B3618 which is enabled by Throttle vs RPM PE enable B3616.Originally Posted by cmitchell17
I asked Jesse (Wait4me) to look into that a couple of days ago. He told me he'd ask Ross to put it into the calibrations once they have some free time.
Is the torque curve supposed to drop 100ftlbs stock?
It does really feel like it looses a lot of power especially on a downshift at like around 35mph it will rev up to about 5800rpm and it sure does not feel like it pulls like other stock 5.3 I have rode in.
Im going to mess with the pressure some.
The truck seems like it runs good, but I still havent checked the plugs since I have gotten it. But one problem I can't even get the plug wires off. Is there a trick to it or do they just get stuck on? I tried to twist them but cant get them to come off and I dont want to pull to hard on them.
If you feel it losing power, then the PCM is calculating the torque properly.
Are you getting misfires (log these, and listen/feel also)...?
Engine can run good at light load with bad plugs/wires, but will misfire under high load.
How many miles on the plugs/wires...?
Twist them using a pair of pliers...
if they are very stuck, you need new ones anyway, so slice them (longwise) with a razor knife (careful).
Also, understand that the experimenting with the pressure at 200ftlb is for the purpose to eliminate the trans. cal. settings (torque reduction and abuse management) as the cause, and is not to be seen as the "fix", so don't forget to undo this when done experimenting.
Last edited by joecar; January 30th, 2007 at 10:26 AM.
I just bought the truck about 2 weeks ago.
I just cant get the wires off to check the plugs. Can i spray like penetrating lube on it or is that bad?
And I dont think im getting missfires I will log them though, at idel I might be able to feel a small shake but not much.
Try twisting and turning while pulling on them... They can be a pain sometimes.
The shake at idle isn't something to worry about unless it's real bad. You can get rid of most of it by raising the idle timing 3-4* and/or bumping idle speed up 25rpms or so.
Ok I bumped up the pressure and took a run.
The WOT shifts feel a little faster and stronger.
Does it need more pressure and is it safe to put more pressure in it?
And will a stock transmission even be able to give a good frim shift at WOT?
It ok to have more pressure;
But do diagnose the torque drop (hmmm... is air cleaner ok);
I'll look at these files when I get on my other PC.
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