Car "stumbles" at lower rpms
#1
Car "stumbles" at lower rpms
Ok, I finally got my car running decent. LC1 reads fine, yeaa!!!. I do have a problem and it is that at lower rpms (1000-3000rpms) when I'm cruising and apply throttle the car stumbles, its not smooth at all. I did many logs and used the analizer but I cant get rid of it. Could it be a timing issue or VE table is not adjusted right??
Any ideas?
BTW the car does have a 7lbs flywheel but I dont belive it makes such drastic driveability issues. Im sure its the tune, but I dont know where to look.
here is my (well, brainecks tune modified to suit my car) tune
Any ideas?
BTW the car does have a 7lbs flywheel but I dont belive it makes such drastic driveability issues. Im sure its the tune, but I dont know where to look.
here is my (well, brainecks tune modified to suit my car) tune
#3
Here is a log and here is my other map that I smoothed out by hand after analizing the 1st map (the one I posted) through the log.
I didnt have time to try it yet but it should make it better.
Cruising AFR is 14-16 it jumps all over.
#5
Is AE kicking in during cruise? If the MapDot/TpsDot threshold is too low, or if there is noise in the signal, you can have AE kick in when you don't want it and make AFR wildly jump around...
If it's just happening at tip-in it could be AE just needs to be dialed in.
Otherwise it may just need a good steady state tune... I've felt cars run like CRAP that just needed a good tune, and people had been driving them that way for a while and dealing with it. Tune it and a beautiful thing happens .
If it's just happening at tip-in it could be AE just needs to be dialed in.
Otherwise it may just need a good steady state tune... I've felt cars run like CRAP that just needed a good tune, and people had been driving them that way for a while and dealing with it. Tune it and a beautiful thing happens .
__________________
Jerry a.k.a. 'FoundSoul'
DIYAutoTune.com
'91 Miata BEGi S3 GT2560 w/ MSPNP - 14.1psi - 253whp, 232wtq
'95 Miata n/a
A few other cars....
Jerry a.k.a. 'FoundSoul'
DIYAutoTune.com
'91 Miata BEGi S3 GT2560 w/ MSPNP - 14.1psi - 253whp, 232wtq
'95 Miata n/a
A few other cars....
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09-05-2015 09:02 AM