- Sat May 21, 2022 9:49 pm
#57079
1992 MX5 with Speeduino PNP, GM IAT, vTPS, AEM 30-0300 WB.
Stock everything else.
I've had speeduino running since 2020.
Never had issues with cranking over. Idle runs a little high, but overall it's ok.
However I've had the dreaded hesitation since day 1. I was never able to tune it out. Consequently I've not been able to get a good tune because the hesitation causes so much trouble.
Today I updated the latest firmware + loaded the latest basetune and setup my WB and my vTPS.
I've attached a log I took earlier today, it's short but should have enough data.
Mechanically my car is like any other stock 92. I don't believe I have any vacuum leaks. My throttle looks good.
The hesitation happens when I push the throttle in. I can accelerate very very slowly without any hesitation. But if I try and drive it normally, it will immediately bog down/hesitate. It's as if it's misfiring, but on all cylinders.
This only happens under engine load. In neutral I can rev it to redline real smoothly.
Here's what I've tried:
WUE ON and OFF. No effect.
ASE ON and OFF. No effect.
AE ON and OFF. No effect.
Dwell settings, can't recall, but I messed around quite a bit with no effect.
VE tuning, more fuel.. less fuel.. no effect.
Stock everything else.
I've had speeduino running since 2020.
Never had issues with cranking over. Idle runs a little high, but overall it's ok.
However I've had the dreaded hesitation since day 1. I was never able to tune it out. Consequently I've not been able to get a good tune because the hesitation causes so much trouble.
Today I updated the latest firmware + loaded the latest basetune and setup my WB and my vTPS.
I've attached a log I took earlier today, it's short but should have enough data.
Mechanically my car is like any other stock 92. I don't believe I have any vacuum leaks. My throttle looks good.
The hesitation happens when I push the throttle in. I can accelerate very very slowly without any hesitation. But if I try and drive it normally, it will immediately bog down/hesitate. It's as if it's misfiring, but on all cylinders.
This only happens under engine load. In neutral I can rev it to redline real smoothly.
Here's what I've tried:
WUE ON and OFF. No effect.
ASE ON and OFF. No effect.
AE ON and OFF. No effect.
Dwell settings, can't recall, but I messed around quite a bit with no effect.
VE tuning, more fuel.. less fuel.. no effect.
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