S300 cranks no start

[Jbrracer]

s300 in p28 ecu.
smanager shows online does datalog, uploads and downloads correctly.
using the "b20 non vtec" base tune.

Car is b swapped hatch with b20b non vtec head.
car will run on p75 ecu fine.

What am I missing


Thank you!

Jeff

[Spunkster]

Is there fuel and spark?

[Jbrracer]

fuel pump primes no spark

thanks

[Spunkster]

You need to try the ECU on a known working vehicle and see if it starts and runs with the calibration for that vehicle. If it does not, then the ECU may be bad.

[Jbrracer]

I will try that, it wouldn’t matter that it’s a non vtec motor and harness correct?

[Spunkster]

It should not matter for just starting it up as long as the calibration loaded is close to the vehicle you are testing in.

[Jbrracer]

hey spunkster

I socketed a p75 and it did start.

I'm suspecting a faulty ecu. any thoughts on what i could try on this bad one before switching to the p75?

Thank you a ton

Jeff

[Spunkster]

You can try replacing the capacitors, but that may not solve anything. https://www.hondata.com/products/access ... acitor-kit

It's usually more costly and takes more time than it is worth to try and repair a damaged ECU. It is better to just get a working ECU instead.

[Jbrracer]

I have a set on hand ill give it a shot