Fuel injector testing?

[SturdyHSV]

I'd like to get my fuel injectors tested as I've been chasing a misfire and have ruled out spark as being the issue, have replaced plugs (previous plugs all visually looked fine and identical), replaced HT leads and swapped a new coil pack through each cylinder, none of which made a difference.

I'm not getting any fault codes from the diagnostics (with EFI Live, not just a generic OBD2 scanner) so don't have a cylinder to focus on, have verified resistance across all of the injectors, so figure the next cheapest thing to try is having the injectors tested. A replacement is only £30 but swapping one of those through the system would be such a messy process with fuel everywhere I'd rather just pull them all out and get them tested definitively.

Anyway, I work in Aylesbury but live in Northampton, any recommendations on somewhere I can take a set to be tested?

Googling turns up a lot of diesel specialists, I'd be inclined to assume they could do the job but thought I'd quickly check on here in case anyone has a recommendation?

[SturdyHSV]

LarJammer said:

Marlin Motors in Bletchley can do it.
Before you do that I would get a temperature probe and see if you can identify which cylinder. Just measure the temp of each (cold) exhaust as it exits the head & see which one is markedly different as the engine warms up. Personally I'd be popping the cam covers off & looking for a broken valve spring.

That's an interesting idea, will see if a friend has a temp probe to hand

I've already had the rocker covers off (pushrod motor) and didn't notice anything broken, but then I wasn't specifically looking at the valvesprings at that time, was just swapping back to stock covers to use the stock coil location and stock HT leads to eliminate the ones I made up myself!

Thanks for the heads up regarding MM too