Ideally, a cct test needs to draw a similar current to the rated load on that circuit - a test light is great for basic cct integrity - but might not draw enough current to find the real issue - The LED test lights are notorious for this, needing microamps to illuminate
![Roll Eyes :rolleyes: :rolleyes:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
You'd need to know the size of the lamp, and thus the current draw it demands..
My preference is to use lamps of various sizes - for example, a headlamp - given each filament will draw about 4.6A - and a 21W bulb will draw about 1.7A ....so, if your solenoid circuit will run a 21W bulb without issue, then it is fine.... ( it's a great use for headlamps with one blown filament ...
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Change the FIP and the injectors - BUT, you loose a lot of power in so doing, so you "need" to fit a full width intercooler and then tune the thing properly ( or better, get someone who has the proper kit, and get them to do it ) - it's a last resort really - but, to me, who hates electronics and modern vehicle "reliability" - it was the only way forward..... I now have 146HP and no electronics ....
Well, take as much care of it as you can
![Er... what? o_O o_O](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
- be careful near the wires etc .... mine let the smoke out, so I had no option
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Ah - technically yes.... When mine died, about 5 years ago, I was quoted over £1K to build a new injector !! ....