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ignition cuts out when pwm on

Posted: Thu Apr 06, 2023 4:05 pm
by Lookout22
i was on the dyno today tuning my car and and i finally got to turning my boost controller on and it seems like everytime i did, it would casue some weird ignition cut. ive never run into this before but it put the brakes on the day for sure. can someone please help me see what wrong here? calibration file and datalogs attached

Re: ignition cuts out when pwm on

Posted: Thu Apr 06, 2023 4:20 pm
by Spunkster
The issue appears to be related to VTEC activation. Check the wiring for VTEC and grounding engine bay grounds as it may be grounding through the VTEC solenoid.

Re: ignition cuts out when pwm on

Posted: Thu Apr 06, 2023 5:00 pm
by Lookout22
I grounded the crap out of the engine in three different spots. It still only does this when pwm is activated.

Re: ignition cuts out when pwm on

Posted: Thu Apr 06, 2023 5:21 pm
by Lookout22
Also some of the examples I see are no where near vtec activation

Re: ignition cuts out when pwm on

Posted: Fri Apr 07, 2023 9:00 am
by Spunkster
Post pictures of the grounds in the engine bay.

Re: ignition cuts out when pwm on

Posted: Fri Apr 07, 2023 11:51 am
by Lookout22
There’s enough to ground a lightning bolt

Re: ignition cuts out when pwm on

Posted: Fri Apr 07, 2023 2:47 pm
by Spunkster
I don't see anything that goes from the battery or fuse box.

Re: ignition cuts out when pwm on

Posted: Fri Apr 07, 2023 3:41 pm
by Lookout22
Battery is trunk located and ground is one of those same cables grounded to the body. Where is the fuse. Normally grounded ?

Re: ignition cuts out when pwm on

Posted: Fri Apr 07, 2023 3:54 pm
by Spunkster
I would recommend that you try the ECU in a known working vehicle before doing anything else. I suspect a wiring issue in your vehicle is the cuase.