E34 Troubles

[calibra]

There are two O-rings on each injector, one at the fuel rail and another at the head.
Remove the fuel rail and do them all, they are cheap.
Better yet send the injectors out for ultrasonic cleaning and "refurbishing" which will get you clean injectors, a fresh screen in each and new O-rings.

mine doesnt have a rail its a old diesel just have the main pump with pipes leading off to the injectors

[Ross]

Ah yes. Please forgive my yankcentric reply.
I've never laid eyes on a BMW rattler so will remain in suspense for the correct solution.

[calibra]

hehe for giving it a go would of been nice if it did have petrol injectors

[Morgenster]

Trouble starting on a hill facing up? How much diesel is there in the tank at that time? If I remember correctly the pump is forward in the tank and if your tank is not well filled it'll be sucking air on a serious incline.

As for the injector troubles: do you notice any problems while the car is running?

Oh and the center vents only blow cold(ambient) air on basic E34 models and I keep those closed during winter. Then again I don't even have airco.

[Ferret]

Where's the injector leaking from?

Is it coming from the pipe connection bolt at the top, the return hoses at the side or where the injector seats in the head?

If it's the bolt at the top, wrap a rag around it, back the bolt off (try not to get diesel in the face!) and get some /very/ fine glasspaper and sand the end of the pipe and top of the injector clean, wipe up any mess with the rag and bolt it all back together.

It'll run like absoloute **** for about 5 minutes after start up if you get air in the line... if you're going to clean injectors best to do them one at a time and then run the engine for 5 minutes...

If you clean them all in one batch, like I did on my 205... you're in for trouble as the injection pump cant build pressure to open the mechanical injector. Took me a good 20 minutes of engine cranking to get the 205 to restart :P

[calibra]

for replys guys

with the vents there is a hot and cold setting but it doesnt seem to work didnt know if it had a sensor or just a cable that might of come adrift.

the injector is leaking at the base i think might be coming from the return pipes i have replaced them but its not like there much holding them on. Ill get an injector tool today and take it out and have a good look at it.

with the fuel pump in the take im now 100% sure its dead i pumped 12volts to it and it still didnt make a sound so ill order a new one, im still only getting 6volts down the line to the pump so might fit my own relay and take a feed from the battery. can anyone tell me does a relay need many volts to switch on?

I fitted the one valve this morning and it doesnt seem to have done much to help me run it round the block switched off and then tried to start up again and had to crank it for about 10secs before it started but im guessing and hoping really that its this injector thats the problem with this (compression) but we're see im going to full it right up and see if starting gets better

[Ross]

The relay will close with way less than 12 volts, but weakly. If you've had low voltage there the points in the relay could be toasted from arcing.

[Ferret]

ross
i tested the pump lead with the relay removed and a fused wire in its place pin 30 and 87 guessing its the same for the diesel as it is for the petrol, i just done what the bently manual said for testing. was hoping another relay might have been the key looks like things are going to get hard if its not

I have no idea what goes on with these pump wires but they tend to burn out too quickly. Mine had been re-run by someone at some point with much thicker cable...

It's hard work getting cable into the e-box though without dismantling a whole pile of stuff!

[calibra]

ross
i tested the pump lead with the relay removed and a fused wire in its place pin 30 and 87 guessing its the same for the diesel as it is for the petrol, i just done what the bently manual said for testing. was hoping another relay might have been the key looks like things are going to get hard if its not

[Barney Paull-Edwards]

Ross has just made a good point,tomorrow try connecting a jump battery then give it two bursts of glow plug, if it fires up uphill straight away theres your problem, and mine,low voltage.Me am going to renew 12v feeds from battery to Starter and ECU with welding cable, good cross-sectional area.