injector testing

[will930]

as you may know my car is up and running again =] but i need to test its current injectors to ensure they are giving the same rates the info i have gathered tells me to do this

remove rail
position injectors into 4 individual containers (preferably the same)
keep into place gaffa tape
disable spark at dizzy
foot full on throttle
turn key for 10-15 seconds
then make the that all the sameish level in the container
using same container would aid in this

thanks in adv\nce

 

[frank]

i think the fuelpump will cut after 5 secs if the ecu receives no spark signal will

 

[will930]

well ill have to keep the spark then lol

if i find there iffy ill test the other rail in the same way and use a decent set of injectors

 

[frank]

i think i would just bin that suspect injector personally will, that valve had suffered lean conditions imo

 

[will930]

well it would be a learning curve anywho... thanks anyway ill report back tomorrow if i havent set myself on fire hehe

 

[getawaycar]

Sounds like you are planning some sort of ASNU type testing rig.

The ECU will cut off after 5 seconds without a crank signal.

Without the proper test bench you are basically testing the petrol fuel injectors the same way you would do a leak off test on a modern diesel engine.

It would be far easier and safer just to send them to a specialist and pay for half an hour of their time.

If you have a decent fault code reader/Consult emulator you could do the power balance test and monitor the CO reading, if there are wild differences you may have a dodgy injector.
Alternatively, if you have a diagnostic computer you could scope the injector pulses. On our Snap on machine you can plot all 4 at the same time so its easier to see if there are any differences.






Or you could just buy a handful down the breakers and mix and match! :laughY)

 

[r-reg-sr]

well it would be a learning curve anywho... thanks anyway ill report back tomorrow if i havent set myself on fire hehe

where is this tomoro's world report back?

 

[will930]

I simply swapped the suspect injector for one from old rail