My daughters Nissan Micra refused to start today - engine turned over ok but 
it would not catch.
In frustration she called out the AA (homestart) who asked if it had been 
moved.
oddly enough I had to start it yesterday to get it off the drive so that I 
could park my motorhome.
The AA guy said that it was flooded because it had not been run for long 
enough.
He disconnected a lead (don't know which one) from the fuel injectors & and 
managed to start it..
after reconnecting it ran ok.
He said this is a common problem with fuel injected cars more so on the 
bigger engined ones if they are started moved & switched off pretty quickly. 
He referred to a spate of problems on Boxing Day when a lot of call outs 
related to the same situation.
I have never come across this before - is this common??
I couldn't see what wire he disconnected - I would like to know if this 
happens again in the future.

Ste

spam wrote:


> My daughters Nissan Micra refused to start today - engine turned over ok
> but it would not catch.
> In frustration she called out the AA (homestart) who asked if it had been
> moved.
> oddly enough I had to start it yesterday to get it off the drive so that I
> could park my motorhome.
> The AA guy said that it was flooded because it had not been run for long
> enough.
> He disconnected a lead (don't know which one) from the fuel injectors &
> and managed to start it..
> after reconnecting it ran ok.
> He said this is a common problem with fuel injected cars more so on the
> bigger engined ones if they are started moved & switched off pretty
> quickly. He referred to a spate of problems on Boxing Day when a lot of
> call outs related to the same situation.
> I have never come across this before - is this common??

Very!

> I couldn't see what wire he disconnected - I would like to know if this
> happens again in the future.
> 
> Ste


Easiest to find the fuse for the fuel pump and pull that. 

Chris

-- 
Remove prejudice to reply

Fuel pump relay or main injector fuse if I remember rightly -in the little 
box that goes across the car between the battery and the radiator. Nice and 
handy there!

When you turn on the ignition the system pressurises - so even flooring the 
throttle and spinning over the engine just pumps more fuel in! need to do 
this with the system disabled, so removing the relay or the main fusible 
link will do the trick. I think our guy just kept removing the thing and 
putting it back in while the engine was spinning over, but I'm not sure if 
that was wise (danger of sparks).

I have heard that some vehicles have a "technique" built into the EMS 
software but haven't a clue what it would be, or if it is the same on all 
cars.


"Springtime" <springtime@dial.pipex.com(spam)> wrote in message 
news:43134ce9$0$13704$cc9e4d1f@news-text.dial.pipex.com...

> My daughters Nissan Micra refused to start today - engine turned over ok 
> but it would not catch.
> In frustration she called out the AA (homestart) who asked if it had been 
> moved.
> oddly enough I had to start it yesterday to get it off the drive so that I 
> could park my motorhome.
> The AA guy said that it was flooded because it had not been run for long 
> enough.
> He disconnected a lead (don't know which one) from the fuel injectors & 
> and managed to start it..
> after reconnecting it ran ok.
> He said this is a common problem with fuel injected cars more so on the 
> bigger engined ones if they are started moved & switched off pretty 
> quickly. He referred to a spate of problems on Boxing Day when a lot of 
> call outs related to the same situation.
> I have never come across this before - is this common??
> I couldn't see what wire he disconnected - I would like to know if this 
> happens again in the future.
>
> Ste 

"Springtime" <springtime@dial.pipex.com(spam)> wrote in message
news:43134ce9$0$13704$cc9e4d1f@news-text.dial.pipex.com...

> My daughters Nissan Micra refused to start today - engine turned over ok
but
> it would not catch.
> In frustration she called out the AA (homestart) who asked if it had been
> moved.
> oddly enough I had to start it yesterday to get it off the drive so that I
> could park my motorhome.
> The AA guy said that it was flooded because it had not been run for long
> enough.
> He disconnected a lead (don't know which one) from the fuel injectors &
and
> managed to start it..
> after reconnecting it ran ok.
> He said this is a common problem with fuel injected cars more so on the
> bigger engined ones if they are started moved & switched off pretty
quickly.
> He referred to a spate of problems on Boxing Day when a lot of call outs
> related to the same situation.
> I have never come across this before - is this common??
> I couldn't see what wire he disconnected - I would like to know if this
> happens again in the future.
>
> Ste


Quite a common occurence. It's happened on my wife's Micra and on my own
3ltr Carlton.
The trick is to let the engine tick over for a couple of minutes if you're
moving the car only a yard or two.
If stuck, the fuse for the fuel pump is 15amp and second down from the top
of the right-hand side of the fuse box,
but if you let the engine tick over, you shouldn't have the problem again.

Hope this helps.

R. Murphy wrote:


> I have heard that some vehicles have a "technique" built into the EMS 
> software but haven't a clue what it would be, or if it is the same on all 
> cars.


Most that I've seen use the same technique as for a flooded carb car, 
keep your foot on the floor whilst cranking.

John

?
I've never come across this before, and I move a few cars that are parked up 
for a months on end for a short distance of perhaps 20 feet
you can't flood an EFI car can you?
unless something is seriously wrong
what happens to the cat?

"Springtime" <springtime@dial.pipex.com(spam)> wrote in message 
news:43134ce9$0$13704$cc9e4d1f@news-text.dial.pipex.com...

> My daughters Nissan Micra refused to start today - engine turned over ok 
> but it would not catch.
> In frustration she called out the AA (homestart) who asked if it had been 
> moved.
> oddly enough I had to start it yesterday to get it off the drive so that I 
> could park my motorhome.
> The AA guy said that it was flooded because it had not been run for long 
> enough.
> He disconnected a lead (don't know which one) from the fuel injectors & 
> and managed to start it..
> after reconnecting it ran ok.
> He said this is a common problem with fuel injected cars more so on the 
> bigger engined ones if they are started moved & switched off pretty 
> quickly. He referred to a spate of problems on Boxing Day when a lot of 
> call outs related to the same situation.
> I have never come across this before - is this common??
> I couldn't see what wire he disconnected - I would like to know if this 
> happens again in the future.
>
> Ste 

"  dojj"  wrote in
news:devuc4$n8a$1@news7.svr.pol.co.uk: 


> ?
> I've never come across this before, and I move a few cars that are
> parked up for a months on end for a short distance of perhaps 20 feet
> you can't flood an EFI car can you?
> unless something is seriously wrong
> what happens to the cat?
> 

I've known it happen to people a few times, but I think you have to have 
the engine running for a very short period (i.e. no more than a few 
seconds) to cause it. Whenever I'm moving a car by just it's own length, I 
always let the engine idle, just for a few seconds, before switching off, 
and have never had a problem. Once you've flooded it, the unburnt fuel just 
gets blown through the cat and you have to hope that no damage ocurs.


-- 
Stuart Sharp

dojj wrote:


> ?
> I've never come across this before, and I move a few cars that are parked
> up for a months on end for a short distance of perhaps 20 feet
> you can't flood an EFI car can you?
> unless something is seriously wrong
> what happens to the cat?


It is a well-known problem, as any friendly AA/RAC/Green Flag patrol will
tell you. I know that Micras, some VAG and most Fords suffer from it. I can
only assume that after a very brief run, some ECU's allow injection but no
spark?

The cat would not suffer because it only happens when it is cold.

Chris

-- 
Remove prejudice to reply

Theory I have always worked on is this.

Car starts ok ......then is turned off before end of warm up cycle so plugs
have no chance to self clean.
When you come to re start,  the car is very reluctant due to fouled plugs
and high injection duration (more fuel) due to still being cold.

Cleaning the plugs or removing the excess fuel allows a start.

There is a Nissan modification available which is an alteration to the temp
sensor resistance (reduces injection duration when cold) and multi-electrode
plugs (helps with plug fouling)  But its just as easy not to short run the
car when cold :-)


>>>>I have heard that some vehicles have a "technique" built into the EMS

software but haven't a clue what it would be, or if it is the same on all
cars.

It's called clear start..... if you floor the accelerator pedal the ECM 
switches off the injectors.  Not all cars have this function.


G

"Kippers"  wrote in message
news:df238l$91k$1@newsm1.svr.pol.co.uk...

> Theory I have always worked on is this.
>
> Car starts ok ......then is turned off before end of warm up cycle so
plugs
> have no chance to self clean.
> When you come to re start,  the car is very reluctant due to fouled plugs
> and high injection duration (more fuel) due to still being cold.
>
> Cleaning the plugs or removing the excess fuel allows a start.
>
> There is a Nissan modification available which is an alteration to the
temp
> sensor resistance (reduces injection duration when cold) and

multi-electrode

> plugs (helps with plug fouling)  But its just as easy not to short run the
> car when cold :-)
>
> >>>>I have heard that some vehicles have a "technique" built into the EMS
> software but haven't a clue what it would be, or if it is the same on all
> cars.
>
> It's called clear start..... if you floor the accelerator pedal the ECM
> switches off the injectors.  Not all cars have this function.
>


Only Fords as a rule.

Volvo also introduced the triple electrode plugs intended to give a hotter
burn and less likelyhood of fuel fouling, but most of the 5 and 6 cylinders
will flood easily if started and stopped when cold.

Tim..