Injector testing

mikeywarduk · 04-04-2020, 04:58 AM

Does anybody know a program the will test the Injector flow to see if they are leaking or a way to check if they are leaking I know inpa does but I carnt seem to get that to work with my car for some reason it won't find the n47 dde 7 module and I've searched through every file any help much appreciated

Phil325i · 04-05-2020, 06:37 AM

Other than BMW diagnostics, I don't know a programme. But the classic symptom of leaking injectors is problems on cold start-up. Engine coughs and hesitates for a few seconds while the excess fuel that's leaked into the cylinder overnight is burned off. You can also pull the spark plugs after the engine has been off overnight. The leaking injectors can be identified by those plugs that are found to be wet with fuel. As the plugs are very close to the injectors in the cylinder head, the leaking fuel drips onto them.

By the way, if you are replacing piezo injectors, at least renew all those in a bank (cylinders 1-3 or 4-6) rather than just one. And buy the latest revsion of injector avialable

Hope that helps...

EDIT - I see you have a four cylinder diesel, so ignore comment about six cylinders!

04-04-2020, 04:58 AM	#1
mikeywarduk Private First Class 2 Rep 102 Posts Drives: Bmw 320d Join Date: Feb 2019 Location: Worcestershire iTrader: (0)	Injector testing Does anybody know a program the will test the Injector flow to see if they are leaking or a way to check if they are leaking I know inpa does but I carnt seem to get that to work with my car for some reason it won't find the n47 dde 7 module and I've searched through every file any help much appreciated
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04-05-2020, 06:37 AM	#2
Phil325i Brigadier General 639 Rep 3,212 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Other than BMW diagnostics, I don't know a programme. But the classic symptom of leaking injectors is problems on cold start-up. Engine coughs and hesitates for a few seconds while the excess fuel that's leaked into the cylinder overnight is burned off. You can also pull the spark plugs after the engine has been off overnight. The leaking injectors can be identified by those plugs that are found to be wet with fuel. As the plugs are very close to the injectors in the cylinder head, the leaking fuel drips onto them. By the way, if you are replacing piezo injectors, at least renew all those in a bank (cylinders 1-3 or 4-6) rather than just one. And buy the latest revsion of injector avialable Hope that helps... EDIT - I see you have a four cylinder diesel, so ignore comment about six cylinders! __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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