ECU nailed

Vauxhauls have a very stupid design flaw with  the z19xe engine namely the ecu is strapped to the engine which is subject to heat and vibration.
This engine was fitted   to several vauxhaul cars  so if this engine presents itself with certain conditions the ecu is always the no1 suspect.
In fact most  of these  ECU engined cars are in the scrapyard because of this fault

lunar auto diagnostics

Full range of engine fault diagnostic services Contact us for help

125,east bawtry road
Rotherham
south Yorkshire
s60 4lq

Some problems cant be fixed

A car over a certain age or mileage will reach a point  where it isn't worth   throwing any more  money at it.
Its the time to get scenario.Cars are money pits at the best of times.However people get attached to their cars so its usually somebody else to knock them back into the real world

Your alternator

Everybody knows  a car as a generator or dynamo as they were known.
Alternators can   produce a situation that doesn't affect   starting etc but will  alter the way your engine electronics function.
We always test for these conditions as part of our diagnostics procedures,not saying to much  for the competition will be earwigging but suffice to say  your alternators function plays a large part in your engines electronics

Tel:07891903013




lunar auto diagnostics

Full range of engine fault diagnostic services Contact us for help

125,east bawtry road
Rotherham
south Yorkshire
s60 4lq

loop states

When you start your from cold the engines computer is using a lot of its built in maps until  the O2 sensor and catalytic converter reach operating temperature.
Until then  the computer will  use its default values to some extent,and not apply any fuel trims to the system.

If you are in Sheffield and need   a hand with your engines running state let us know
Tel:07891903013

lunar auto diagnostics

Digital multi meters

A classic multimeter must have  an input impedance of ten megohms to avoid damaging the ecu that deals in very small  currents.
Most meters are 10 but it is  necessary to check before you start prodding about  and messing things up

lunar auto diagnostics

Full range of engine fault diagnostic services Contact us for help

125,east bawtry road
Rotherham
south Yorkshire
s60 4lq

Automotive engine diagnostics sheffield

Automotive engine diagnostics Sheffield is our second name
We offer  full diagnostic services throughout Sheffield so if you have a BMW or a Nissan micra give us a try.
Remember throwing parts at a problem trying  to solve  it never works.If your garage as started mumbling new item  at £300 then its time to walk away from them
Many problems can be solved with simple  solutions ie re wiring or  cleaning of a component an airflow meter or  an ABS brake sensor

Tel.07891903013

lunar auto diagnostics

Full range of engine fault diagnostic services Contact us for help

125,east bawtry road
Rotherham
south Yorkshire
s60 4lq

Never let a garage do it

If you have had your car into a garage and the possibility of a new ECU starts creeping into the picture then they are simply guessing or using the  swap parts scenario in the vain hope of correcting the problem.
This practice can quickly spiral out of control and give you  big  bills and big headaches.
There are a few out there who  understand test equipment and its capabilities,we do and can pursue a fault  using intuition and imagination
So if you are in Sheffield/Rotherham we can cater for all  your needs   regarding  engine fault diagnosis

lunar auto diagnostics

Full range of engine fault diagnostic services Contact us for help

125,east bawtry road
Rotherham
south Yorkshire
s60 4lq

It will cost you a lot more

It is tempting to ignore an engine light if it isn't affecting your engines running to much
It is expensive to run a car at the best of times let alone having to pay out £40 pounds to find out why a fault light as appeared.
The rule with engine problems id a little fault can escalate into a big fault and an expensive one very quickly.

lunar auto diagnostics website


lunar auto diagnostics

Full range of engine fault diagnostic services Contact us for help

125,east bawtry road
Rotherham
south Yorkshire
s60 4lq

the code is just part of the story

A diagnostic code is just the beginning.
A code  stating  a sensor is at fault doesn't instantly mean the sensor is at fault.
Wiring condition whether it be chafed  broken or simply  the resistance as become excessive

live data from a 2001 volkswagon polo

This is snapshot of data from a 2001 polo  no symptoms just a check that all is in specification
we carry out these  checks to ensure the engine isn't struggling or heading foe either a pending code or a code that will illuminate the dash board MIL light
This car uses a wideband fuel sensor that gives you a far better  determination of mixture strength
Oxygen sensor current is the line to look for measured in milliamps