Do they make any difference? Are they worth getting?
My understanding is that they may help the air fuel mix on pre-injection (carby) engines. Most engines after '86 have an efficient stoichiometric fuel mix and engine management system. If you really want to improve economy optimise tyre pressure and take it easy.
Some vehicles show marked improvement with higher pressure injectors. You need to ensure fuel supply pressure is adequate for new injectors and that the ECU settings are optimised to suit this new configuration. Depending on the vehicle ecu chip programming can work wonders.
Hey mate, I was sucked into thinking I could get a bit better performance out of my old 4.2 diesel slug, should of spent it wisely on a few cartons instead and put it towards a turbo, snorkel, exhaust etc.
Your right Grit. Thats what I ended up buying a 4.2 turbo,I then put a 3 inch mandrel bent exhaust, and snorkel on and am absolutely wrapped. No more getting overtaken by them Toyotas