I just installed a S300 on a P28 ECU. Every calibration loads fine and responses to any change that I upload. When I start driving, under normal acceleration, the engine stall for a fraction of a second exactly at 2K RPM. Once pass the 2K the engine keeps accelerating normal. I noticed when this happens my LM-1 goes above the 20:1 range. It seems like the injectors or cut-out at that point. A different calibration doesn't make any difference. A/F ratios and idle is normal and no ECU codes. The only thing I did was cut the ELD cable for future data logging.

This problem is pretty annoying because when the engine stalls and comes back again it pulls your neck really hard, it makes the car undriveable.

Any help would be appreciate it.

Thanks

 

What spark plug wires are you using? Some brands give off excess noise that interferes with the ecu. If you have MSD wires I could see those being the problem.

Other than that, I don't know a whole lot about the s300 unit itself. Is it just an instant before it kicks back in? Does the ecu reset when it does this?

 

Try calibrating your TPS. Connect to the S300, turn the key on, open your map, click on the lightning bolt( or hit F10), on the parameters tab select the TPS. Without touching the throttle click on the 'read' button for minimum throttle. Then push the throttle to the floor, click 'read' for maximum throttle. Upload the map. That will clear up many TPS related issues.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 &raquo;</TD></TR><TR><TD CLASS="quote">What spark plug wires are you using? Some brands give off excess noise that interferes with the ecu. If you have MSD wires I could see those being the problem.

Other than that, I don't know a whole lot about the s300 unit itself. Is it just an instant before it kicks back in? Does the ecu reset when it does this?</TD></TR></TABLE>

I'm using OEM spark plug wires and OEM coil.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">Try calibrating your TPS. Connect to the S300, turn the key on, open your map, click on the lightning bolt( or hit F10), on the parameters tab select the TPS. Without touching the throttle click on the 'read' button for minimum throttle. Then push the throttle to the floor, click 'read' for maximum throttle. Upload the map. That will clear up many TPS related issues.</TD></TR></TABLE>

I'll try to do that tomorrow. One thing I noticed earlier today that when the engine stall the injector and the duty cycle goes to green on the display window.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H22_EK00 &raquo;</TD></TR><TR><TD CLASS="quote">One thing I noticed earlier today that when the engine stall the injector and the duty cycle goes to green on the display window.
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That means that the ECU is going into fuel cut and the duty cycle is zero. The TPS calibration will probably correct your problem.

 

Couldn't wait until tomorrow so I went outside and did what you said. Problem fixed! Maybe I pissed my neighbors you know open exhaust at 8PM at night

TPS were off, it calibrated to -4% to 96%.

Thank you very much I really appreciate your help.