Starter cranking

SonicVQ

If you want to crank the engine for about 10 seconds without starting, you don't need any tools or have to remove any fuses. Our cars have a "clear flood" mode.

With one foot pressing on the brake (or clutch to the floor) use the other foot to hold the accelerator pedal to the floor, then push start.

The engine will crank for about 10 seconds, and will not start as the fuel injectors are turned off.
Also no codes will be set. I have done this many, many times on my G37 while researching how quick oil pressure builds.

If you want to have fun with your buddies car or on a test drive, use this method the next time you start it. I did this when I drove my friends brand new Maxima. I thought it was funny, and he thought his car was broken!

Note:
Based on some testing, this doesn't work on all cars. When I tried it on my old 2001 BMW 530, the engine raced towards redline for a moment.

ZoomZ

Thanks. I kinda asked this in my first post, but I guess it's not well known. I have performed similar functions like this (throttle re-learn) but wasn't sure if starter would time out or crank if fuel pump and ignition fuses are pulled.

I had a look at the starting circuit wiring diagram last night. Simple enough system. Read nothing about this feature, but will look again.

Thanks again.

SonicVQ

You are correct.... most don't know about this useful feature... AND it is not mentioned in the FSM anywhere.

I am only aware of if after watching a ScannerDanner video a few years ago, and thought that I should try that to see if it works on my G37 - It does!

ZoomZ

Nope, nothing in FSM. Only thing I found was, start OFF is controlled by ECM, based on Engine speed and Battery voltage. Makes perfect sense. Just no flow chart to show what speed and what Batt. voltage.

Not a big issue, just liek to learn things. As you have posted, we learn something new everyday.

ZZ

SonicVQ

On my car, the clear flood cranking speed is around 175-185 RPM and battery voltage was 9.5 - 10.5.

ZoomZ

Ok good to know, thanks. However, I was looking for Normal start cut-out engine speed and Batt. voltage. You would think FSM would list that. (what the ECM see's)

All they care about is NOT starting. lol