Thats a fuel pressure reg, with gauge. No use to you.

 

k coolio.

talked to a bmw mechanic today, i told him exactly whats going on and he said instantly with no hestitation that its my ecu. he says it is the only thing from stopping the injectors from opening and aloowingthe fuel to go through.

he says ive been looking in the wrong place. is he right? how much am i looking for a new ecu etc...

 

very Unlikely it will be the ecu.

 

Sorry to say the BMW mechanic obviously isn't familiar with MFI, if it was multi EFI then he would be correct........

The only thing that opens the injectors is fuel pressure, and is CONTINUOUS injection.

 

wasn't early BMW's fitted with mfi?

 

Probably.......but regardless he still isn't familiar with MFI is he

 

rs 1600i wiring loom hi safechav you seem to know wot your taking about with these cars can you tell me how to convert a rs1600i loom to run on a single coil its got a dizzy with a connecter that is black with 3 wires in it green,brown,and black also on the rs loom it as 2 connecters one is red and the other black how do i wire these to a single coil and which wires go to live and which wires got to negitive as inside the car i have a blue box and now with the new loom i have bought it as a black box that looks like it as 2 relays inside i think but my old loom didnt have this your help would be great thanks

 

sorry to jump on your post i dont know how to send a pm message new to this site

 

No, i was just pointing out he must be a new skool BMW mech, the ones that just use dianostics.

 

well he a s[ecialists in e30s

but he said that regardless of what car its always the ECU that controls the openeing of injectors. ...

talking about fuel pressure... i got my mate to squeeze the inlet pipe from the fuel filter to the metering unit and the car started to rumble when he did that...

but it only happened that once... does that help anthing..

 

if pressure is the issue, it needs to be measure to know what the situation is.


Tell your BMW mech, that he's wrong, as mfi is a 'mechanial fuel injection' as Safe chav has already said.

 

il let him know...

well if fuel pressure is the issue... i guess ill just get it tested...

 

alright did voltage test across the fuel pump, and

at 1st click pump was drawing 8v
during crank was about 9ish


battery was at 12v
and at crank was 10ish...


guessing thats enough for the pump to work?? or should i replace it?

 

well towed it to local garage, a guy who works there has built many rst so he knows whats going on.

found that alternator was put on the wrong way as was the belt, and a coupla wires were out, but nothing related to fuel.

they are going to sort out the timing, which they said will take a good 4 hours, and then look at the fueling... because its all related aparetnly. dont really see how timing the car will get fuel through to the injectors, but dont have much choice now.

so will keep all posted! thanks for the help!

anyone know how i can go about sueing/getting money back from the previous mechanics... this garage said they will write everything out that is wrong and back me up... but what would i do..?

 

4 hours to do the timing?

 

i though id be able to do it in 4 hours... not a qualified machanic!

doesnt matter... needs to be done !

 

Keep going to poor rip off garages and your car will never be as good as it could be, and cost you alot more.

and you would not be able to do it in 4 hours, as havent got the knowledge or equipment.

 

Can you just find out for me how exactly you fit an alternator on a CVH the wrong way.

And on that note im even more interested to know the justification behind telling you the BELT was fitted the wrong way?!?!?!

And as said........4 hours to time it up?!

How much did that little lot set you back?

 

i'm not being funny Hav,


But people keep feeding you b-llsh-t, and as you dont know any better, you believe them.

if you brought the car to me as i said, i could of gave you a honest stat of play of the engine that was built for you. As i dont believe in slating people if they done a honest job, as its their Lively hood.

But 3 hours is long enough to remove, check, and refit, re time the cam, and set the static timin.

 

I dont exactly have a choice do i?? To get the car up to you Dan itl cost me a good Ł60 if not more... i pushed it down to a local garage/

im goin to go down and find out if it was all fitted the wrong way... you are 1000000000000000000000% sure it cant be.. with the belt because then ill take it further with them.

 

also theyr not going to charge me if they dont get the car started... so they can mess around with anything they want as long as they sort out the fuelling problem... thats what im paying them for.

as for the alternator, if they try and 'fix it' and arnt successfull they cant charge me obioiusly!

 

You can only fit that alternator on that bracket one way mate! Well you could probably get it on another way (where theres a will theres a way) but you wouldnt be getting a belt on the pulley though!

And the belt isnt directional, its just a V groove belt?!

 

yea they said the V;s are the wrong way..

anyway, their not concentrating on that... theyr on the fueling so hopefully theyl crack it.

they sprayed some stuff down the intke (carb something.. think it replicates fuel) and the carwas backfiring majorly. does backfire mean that there is air in the system???

 

Hope you get it sorted.

Sounds like they are spraying Carb cleaner in there.

 

They said what taking the piss aint they!

If its backfiring that means the plugs are firing whilst the exhaust valves are open! - check the HT leads ore on in the right order

 

How long have they spent on it now?

 

too fucking long IMO!

 

this particular garage? about 5 hours so far but dont know how far theyve got. they were on the backfiring about 10mins after i got them the car.

overall ive had the caqr for 3 months nearly, a day of which i drove and a week of which ive had. rest of the time its been in the garage. i dont know what ti di anymore

 

quick update,

theyve got fuel through injectors but they are saying theres not enough pressure there to start the engine.

any ideas?

 

So have they tested the fuel pressure?


if its not running yet, and they dont know why, they aren't as clued up as they said.

What have they said the reason is?

 

 

they havnt tested the fuel pressure because they can see thers not enough pressure coming out...

they are still looking for the reason. i made it clear to them that theyr not charging me for investigation. so itl only when they find the problem that theyl charge for parts and fitting etc.

anything i should tell them 2 do?

 

THEY can see there's not enough pressure, But havent checked it. LOL,





Sorry, but we have told you what to do, and you keep asking.


i know what i would be looking at, and have told you so, but you dont want to do it, which is up to you. But i feel i've wasted my time.

 

if they can see fuel trickling out from the injector pipes i dont think they need to check the pressure. They checked it at the inlet pipe to the metering unit and said it was fine. Theyve taken the old metering unit apart to see whats going on.

 

You seem to forget, as we have said, MFI is CONTINUOUS injection and RELIES SOLELY on fuel pressure.

The injectors are sprung loaded and only open when the fuel pressure exceeds that of their springs...............

I myself, even if i came to the "assumption" the fuel pressure was ok i would still test it so i could be 101% sure and categorically rule that factor out.

 

As above, if fuel's the issue, always start at the beginning of the line. THE PUMP. And fuel pressure.


i would like to be able to tell the fuel pressure by just looking. but i cant, so i test the pressure.

 

checked out the car today. pump is fine. its the metering unit. even the 2nd one i got!!! they put mine back on and took the one i bought apart as it was in worse condition to mine. car starts now, but needs help. the flap on the m/u needs to be pushed down and throttle pushed at the same time to get it to rev up, which it does very nicely. wont idle though as as soon as flap ios left, it just cuts out!

ovbiously the first thing they are looking at is the m.u flap. it rumbles up and down when cranking. When cranking, and the accelerator floored, the flap does not move all the way down, onlyjust a tiny tiny tiny amount. soundslike theres a problem here.

any ideas.

 

Well the flap is never going to move all the way down is it?!

A engine being revved with no load will never require as much fuel as a floored engine pulling a whole car...........

If it won't idle it sounds like an air leak mate, its a classic!

A small air leak is enough to stop it idling but obviously at higher revs, where more air is required, a small air leak is less significant.

 

Safe Chav,

i said air leak to Hav before he posted this thread.



Hav, As said yesterday,


the metering unit come off a running car, so abit why its not working now.

 

and the only real way of testing it, is pressure test from the turbo inlet back wards.

This should of been top of the garage list to do 1st,

This could be down to you disconnecting the breather setup and not blanking the metering unit and pipes correctly as i said before..