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S300 intermittent issue

Posted: Fri Dec 06, 2019 5:55 pm
by Tylenol21798
Blips in ecu car will read fine, but blips randomly and shows the ecu going crazy. I've attached a picture of what it does when It blips

Re: S300 intermittent issue

Posted: Fri Dec 06, 2019 6:04 pm
by Tylenol21798
Here is my map and datalog

Re: S300 intermittent issue

Posted: Sat Dec 07, 2019 8:25 pm
by crluver123
Check the ecu grounds in the engine harness, and any other grounds you can find.
Make sure you are using Resister spark plugs (R in the plug part number, like BKR7E).
If you have a jumper harness, it may be of bad quality and have a bad wire somewhere.

Re: S300 intermittent issue

Posted: Mon Dec 09, 2019 10:11 am
by Spunkster
Post a picture of the bottom of the ECU showing the solder joints for the ECU socketing.

Re: S300 intermittent issue

Posted: Mon Dec 09, 2019 6:42 pm
by Tylenol21798
It's done with rosin core solder

Re: S300 intermittent issue

Posted: Mon Dec 09, 2019 6:50 pm
by Tylenol21798
I'm thinking it may be a bad wire in the jumper harness, I discovered if you more the ecu the car almost dies.

Re: S300 intermittent issue

Posted: Tue Dec 10, 2019 10:05 am
by Spunkster
That sounds very likely.

Re: S300 intermittent issue

Posted: Tue Dec 10, 2019 10:29 am
by Tylenol21798
I'm getting a new one this week. I'll update you if it fixes the issue

Re: S300 intermittent issue

Posted: Sun Dec 15, 2019 7:40 am
by Tylenol21798
The jumper harness has seemed to fix the issue. Thank you guys for the help.