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Dodgy injector? INPA Selective Mass Adjustment values

9.4K views 8 replies 2 participants last post by  marco_polo  
#1 ·
I'm getting the car ready for a remap so I wanted to check the health of the injectors. I read the selective mass adjustment values in INPA (the car was cold). I'm wondering whether this indicates I've got one or more bad injectors?

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Discussion starter · #3 ·
Here are the readings at 88°C

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Assuming a firing order of 1-3-4-2 does this indicate that 2 is over fueling and 1 and 4 are backing off to compensate?

I was planning on taking at the injectors out and running carb cleaner through them. Do you think this will help, or should I send them off to be professionally cleaned?
 
Discussion starter · #4 ·
I also got a screenshot at 71°C, as the coolant happened to be at that temperature when I got home after a drive. (Is that too low?) On a side note, my fuel economy had been a bit disappointing recently at about 39mpg mixed totem and motorway.

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Discussion starter · #8 ·
marco_polo said:
did mine. Just the one.

Turned out to be a worn tip leaking, not sure cleaning would have fixed that!
How bad were your readings for Selective Mass Adjustement in INPA? I just got a quote for reconditioning an injector by Kentinjection.co.uk of around ÂŁ125, so if I can get away with just cleaning them myself and retesting, I'll try that first.