do i pull one injector and put it into a baby food jar and then run the car for 5 minutes - repeat this on each injector?

jim

Put all four in baby food jars .... crank engine for 30 seconds*** ... you are looking for:

Spray characteristics ... nice conical mist
Volume of each

Disconnect coil so you don't produce any spark.

*** To avoid overheating starter ... 30 seconds max ... then let it cool.

thanks - jim

on D jet - do 1 and 3 fire at same time - same for 2 and 4 ??

or is this only with L jet?

You can make a grid and measure the pattern of each injector too. Flow rate is easy. If it hasn't been done before, the o-rings should be replaced too.

I had a problem after a motor had been sitting for some time. Bosch makes an injector cleaning machine that measures everything. Injector places have them.

But I got instant results by soaking the injector tips in fuel and injector cleaner, and hooking the injectors up to a power source on my bench to get the wires moving.

Got them cleaned professionally after the car ran properly... just to be sure I had a baseline for each.

You should pull the spark plugs to allow the motor to turn easier.

Rich

good point - thanks - jim

They fire in pairs ..... I'd have to look it up to see which are pairs ...