Testbook questions

Just got my Rangie 4.6 HSE back from service from the local LR specialist,
but the Check Engine light came on shortly after, so took it back and they
connected the car to their test book console and I watched while the
'engineer' read the codes, looked quizical, then selected 'reset all' on the
engine management computer. It came up with some warnings like 'settings
will be lost, 'ensure throttle is closed' etc. After, the lamp stayed out
so I drove the car home. Now the base engine idle speed is far too slow,
the car nearly stalls when you stop at junctions etc, but the idle speed
will then climb back to normal. Makes moving in a car park real fun! Also
noticed that the temp gauge now reads in the red, and the engine is
definately not overherating. Are these symptons of a badly set up car afer
being reset by trst book?

Alan C
'98 Range Rover 4.6 HSE
'75 Series III 109

"Alan C" <[email protected]> wrote in message
news:[email protected]...
> Just got my Rangie 4.6 HSE back from service from the local LR specialist,
> but the Check Engine light came on shortly after, so took it back and they
> connected the car to their test book console and I watched while the
> 'engineer' read the codes, looked quizical, then selected 'reset all' on
> the engine management computer. It came up with some warnings like
> 'settings will be lost, 'ensure throttle is closed' etc. After, the lamp
> stayed out so I drove the car home. Now the base engine idle speed is far
> too slow, the car nearly stalls when you stop at junctions etc, but the
> idle speed will then climb back to normal. Makes moving in a car park
> real fun! Also noticed that the temp gauge now reads in the red, and the
> engine is definately not overherating. Are these symptons of a badly set
> up car afer being reset by trst book?
>
> Alan C
> '98 Range Rover 4.6 HSE
> '75 Series III 109
I'm not all that familiar with testbook, but if I were you I'd get it
straight back to the $pecialist and ensure that he understands 100% that it
didn't do it before, so he'd better fix whatever "he" did to it.
Badger.

In <[email protected]> Alan C wrote:
> Just got my Rangie 4.6 HSE back from service from the local LR
> specialist, but the Check Engine light came on shortly after, so took
> it back and they connected the car to their test book console and I
> watched while the 'engineer' read the codes, looked quizical, then
> selected 'reset all' on the engine management computer. It came up
> with some warnings like 'settings will be lost, 'ensure throttle is
> closed' etc. After, the lamp stayed out so I drove the car home.
> Now the base engine idle speed is far too slow, the car nearly stalls
> when you stop at junctions etc, but the idle speed will then climb
> back to normal. Makes moving in a car park real fun! Also noticed
> that the temp gauge now reads in the red, and the engine is
> definately not overherating. Are these symptons of a badly set up car
> afer being reset by trst book?

You need to check with the LR specialist but the management system on
your vehicle is one of those that "learns" how you drive. It is
generally said that it can take about 400 miles before it gets itself
sorted out again and adapts itself to the engine and your driving style.

The temp gauge doesn't sound right though.... I'm not sure that that is
"controlled" or adjusted by the engine management system.

cheers

Dave W.
http://www.yorkshireoffroadclub.net/

>>>>> "Alan" == Alan C <[email protected]> writes:

Alan> the codes, looked quizical, then selected 'reset all' on the
Alan> engine management computer. It came up with some warnings
Alan> like 'settings will be lost, 'ensure throttle is closed'
Alan> etc.

What he did was to reset both the fault codes and the adaptive
settings on the vehicle. Now, that may have been the right thing to
do - I don't know without knowing the specific fault codes that
appeared. But I do know that the reset of the adaptive values will
be responsible for the problem you now describe...

Alan> Now the base engine idle speed is far too slow, the car
Alan> nearly stalls when you stop at junctions etc, but the idle
Alan> speed will then climb back to normal. Makes moving in a car
Alan> park real fun! Also noticed that the temp gauge now reads
Alan> in the red, and the engine is definately not overherating.
Alan> Are these symptons of a badly set up car afer being reset by
Alan> trst book?

You clearly DO have a problem somewhere. With the adaptive values at
default, the engine is not happy. Hot suggests running too lean,
perhaps. It should come back to normality within 30-50 miles.

If the light stays off, all well and good. If it doesn't, come back
with the exact fault codes (test book supports screen dump to
printer), and the adaptive values before and after the reset.

Then we have some information to make some intelligent assumptions
about where the problem lies.

ANdy


--
Andy Cunningham -- www.vehicle-diagnostics.co.uk
Eagles may soar, but weasels don't get sucked into jet engines.

> You clearly DO have a problem somewhere. With the adaptive values at
> default, the engine is not happy. Hot suggests running too lean,
> perhaps. It should come back to normality within 30-50 miles.
>
> If the light stays off, all well and good. If it doesn't, come back
> with the exact fault codes (test book supports screen dump to
> printer), and the adaptive values before and after the reset.
>
> Then we have some information to make some intelligent assumptions
> about where the problem lies.
>
> ANdy

Really just an update - Engine is not running hot, traced temp gauge
fault to the sensor, got a spare anyway, but cleaned the contacts and
all back to normal. Fault codes - I've got an OBD II code
reader/reset tool which works pretty good on this Rangie. It was
giving a P1187 code, according to Andy's site this is "O2 sensor
heater short" but according to the manual is heater open circuit.
Took the O2 sensors out (again, only replaced them 3000 miles ago) and
one was open circuit. Replaced under waranty anyway. Check engine
light stays out, no new codes, good! Low idle still eident though,
revs drop when braking to a standstill, more so when cold, and
sometimes stalls. Revs will climb to normal idle mostly. Will have a
go at finding the not mentioned base idle screw in the plenum
somewhere! Wish me luck!

Alan C

cutlea01 wrote:
>
> Really just an update - Engine is not running hot, traced temp gauge
> fault to the sensor, got a spare anyway, but cleaned the contacts and
> all back to normal. Fault codes - I've got an OBD II code
> reader/reset tool which works pretty good on this Rangie. It was
> giving a P1187 code, according to Andy's site this is "O2 sensor
> heater short" but according to the manual is heater open circuit.
> Took the O2 sensors out (again, only replaced them 3000 miles ago) and
> one was open circuit. Replaced under waranty anyway. Check engine
> light stays out, no new codes, good! Low idle still eident though,
> revs drop when braking to a standstill, more so when cold, and
> sometimes stalls. Revs will climb to normal idle mostly. Will have a
> go at finding the not mentioned base idle screw in the plenum
> somewhere! Wish me luck!

Don't play with the base idle - as others have stated the 'adaptive
learning' will take 500 miles or so to sort this one out on it's own.

--
EMB

> Don't play with the base idle - as others have stated the 'adaptive
> learning' will take 500 miles or so to sort this one out on it's own.

I HAD to do something, the car would stall when pulling up at
junctions and manoeuvring into a parking space was really fun! Found
the blasted screw, under the tamper proof plug on the plenum above
where the idle control valve is fitted. Gave the screw about a 3/4
turn anti-clockwise. This had no effect on the idle speed when I
restarted the engine, but it now does not drop below 600rpm when
pulling up. All sorted. Then RPI returned my phone call and confirmed
that occasionally the base idle will need to be reset. Much happier
drive

BTW - The adaptive learning has over the last 300 miles or so made the
engine smoother and more powerful feeling, but made no difference to
the idle characteristics.

Alan C