cster

Is there an easier way to dry crank the engine after oil change?
ie remove fuel pump relay or fuse or something.
I find the sensors are hard to get to on a warm engine as I am a hairdresser (or something like that) by trade.

EJ22 LAD

iTrader: (12)

your risking it starting, albeit a small run by just removing the relay

ianbott

I've never tried it on a Subaru but on a ford escort I had a while back if you planted your foot flat on the gas pedal and cranked the engine wouldn't start something to do with the EFI.

cster

Then maybe run it down before oil change?

cster

This actually works!!!
I wonder if it is still fuelling the cylinders?

JDM_Stig

iTrader: (3)

crank sensor is dead easy to get too.

MarkCSC

If you have girl's hands

JohnD

iTrader: (5)

I think he doesn't want to rather than can't! It can be a bit fiddly if you've never done it before.
Bit risky admitting he's a hairdresser, on here

JohnD

cster

I can see it easy enough, but my hands are not small and are currently covered in bandages where the skin has burned off - and the sensor is still unclipped!

DannyM

Leave the engine to cool before disconnecting it, shirley?

cster

Just found this - it would appear my problem is solved.

"If you've discovered that you have wet spark plugs (rare on fuel-injected engines), you may not need to remove them to dry them out. Injected engines almost always have a Clear Flood mode: Depress the throttle to the floor, and then crank the engine. As long as you hold the pedal at full throttle, the computer won't inject any fuel, and a few seconds of pumping air through the engine, without fuel, will dry off the plugs."

And they say a good mechanic never gets his hands dirty.

joz8968

iTrader: (13)

For future, you could always splice into the ECU loom's appropriate wires and rig up a permanent fascia-mounted aftermarket switch, so as to be able to quickly disable/enable the crank sensor. An elegant solution.

bigarf

iTrader: (67)

in all my years of owning scoobs i have never disconnected the crank sensor once.and i do atleast 8-10 oil changes per year on the one i have now.and yes its still running fine and yes the oil pressure shoots straight up to where it should be as soon as i turn the key.

joz8968

iTrader: (13)

...And here it starts (again!).................

cster

Well now it looks like you don't have to

BlueBugEye

iTrader: (12)

It's good practice to do it however it's not a requirement, most people will be fine never doing it however by doing it you are making absolutely sure!

speedking

Top tip, works on a Spec D Didn't work on a Yaris though, so use with care.

scoobiepaul

Picture/position of crank sensor please. thanks Paul.

Guest

iTrader: (2)

The engine starting immediately after an oil change with the throttle wide open would have some amusing effects! (for any watching bystanders)

Not so amusing for the owners wallet I would imagine.

RICHARD J

iTrader: (4)

Disconnecting the crank sensor is easy & takes seconds not worth wrecking your engine for. If you can't be arsed to do it at least fill your filter with oil before starting. You may get away with it a few times but one day you may hear that dreaded knock knock knock & wish you had done it properly.

bigarf

iTrader: (67)

you should always pre fill the filter anyway.
well after about 9 years and well over 50 oil changes without disconnecting the crank sensor,i must be one lucky mother f***er.

RICHARD J

iTrader: (4)

Correct you should always pre fill the filter but plenty of people don't realise this. I'd say you have been pretty lucky, after 20 odd years experience as a mechanic Iv heard of several Scooby bottom end failures after oil & filter changes & Iv seen a few posted on here. Hope you continue to be lucky, but I won't be risking it with my pride & joy or my customers.

cster

Well it would be if the engine would start - but it doesn't and that is the whole point of the exercise.
Other than that, great post.

JohnD

iTrader: (5)

Sods law states that your next oil change may be your last!


JohnD

bigarf

iTrader: (67)

i'll soon be able to tell you,as i will be changing it again just after xmas.