Engine out??

[Brainfire]

From a total technical numpty (me) ... I\'ve been told it\'s an engine out job to change the metering oil pump - is this correct?

[ro284]

No i\'m pretty sure it\'s not correct, you don\'t need to take the engine out, but i don\'t know whats involved to do it, what is wrong with the metering pump? and how do you know? some tech guy will be along shortly i\'m sure,
Bob

[dandan]

isnt the metering pump right on the front of the block? if so i would assume you can take all the frippery off the front and access it while still in the car, there shouldnt be anything blocking access and cant think of any reason why it wouldnt all come undone ok in that situation...
I\'ll vote for engine IN.

[Brainfire]

Bump... would some techie like to elaborate on this for me? I\'ve only ever seen a metering pump when removed from an RX, but really can\'t see why the engine would have to come out to fit or remove it... help!!

[ro284]

kbareham  
mazdarotaryclub.com Full Club Member   Join Date: Mar 2004
Location: Ringwood, Hampshire
Posts: 63
 
 
I replaced the oil metering pump a few months back. It can be done without removing the turbo\'s - mine stayed in place. However you need to remove the water pump housing because the bottom hose union is in the way. Once this is off, its not too bad - just a little difficult to get to the back 10mm bolt on the OMP. I think it took about 4 hours with me finding out what to remove along the way.

Keith
Hope Keith won\'t mind me finding this,but whats wrong with the one on the car now? good luck Bob

[Brainfire]

Ok, I\'ll come clean... I\'m ****ed right off with the car and no one being able to fix it. The story starts with this post  if you want to read it. After a new fuel pump and plugs, things were still much the same. Crawled the 90 miles throught to the garage in Wishaw where the car has now resided for four weeks.

The prognosis? Apparently it\'s giving error codes for the oil metering pump and the TPS. No bits to swap them out with to find out if this is the problem though. I\'m really ****ed off cuz someone here said it was the fuel pump - new fuel pump. Try the plugs. New plugs. Now Mark says it\'s either the coil, the TPS or/and the metering pump. Now it\'s a lose lose situation... I either don\'t buy the bits and the car sits and rots, or I buy them all (not cheap) but there\'s no saying it\'s definitely going to fix it.... was wanting it compression tested, but no one up here can do it...  and although I love the RX, I\'d never buy another one unless I\'d moved a lot further south than I am now. It\'s just been a total pain in the ass. Even the smallest thing and no one here will even lift the bonnet, never mind fix the thing.

Anyway, I\'ve got a metering pump coming from the States, but if it\'s an engine out/in job to do it, I\'m probably going to bin the idea... still open to suggestions from any techies though... *Grrrrrrrrrr*

Kind Regards

M. T. Lightwallet

[ro284]

Well from Keith\'s thread i posted above, it is not an engine out job, i do know that is how Keith knew what the problem was, the metering pump caused his ecu to go into limp mode, engine protection! he got the metering pump from RX motors in Dorset and fitted it himself as per his thread, i\'m sure RX motors would have another pump, if it was my car i would have a go at that myself, but if you are not able to do that, there are some guys running on premix, i do, but i don\'t know how you would get past the ecu picking up the the fault in the pump and going to limp again! but if you could get it going, join the AA or similar for breakdown cover, with premix added set off to Pips or whoever closest for rebuild, if it needs a rebuild get it done and view it as an investment, when you get it back, you will have huge grin, these cars are worth it!
Good luck Bob

[kbareham]

Chaps
Thats right Bob, I did this with the engine in situ. I got the code out the ECU which told me what was wrong first. Tim at RX motors supplied a replacement oil metering pump, and I got to work.
As far as I can remember, you need to take out most of the pipework at the front of the engine, remove the alternator, and then remove the large alloy water assembly that the water pump fits on to. Once this is out, you can just about get to the 3 bolts holding the OMP on.

With that replaced it was immediately back to it\'s usual self.

Good luck!


Keith

[mattmaclennan]

Just get another OMP and plug it in to the OMP wiring beside the alternator, run the car and see if the error goes away. If it does, replace the OMP. If it doesn\'t, get it on an AA truck and send it to a specialist, they will be able to diagnose exactly what is wrong with it and no doubt have second hand replacements avaliable. ENGINE IN

[banned advertiser]

although I love the RX, I\'d never buy another one unless I\'d moved a lot further south than I am now.

Lots of guys in the south still travel 100 miles to get there cars serviced, I\'m sure you could go to Pip the nearest to you like many others, just need to put yourself out.

[Brainfire]

Ok, from the posts above... first, a daft question...

What exactly is premix?

EXACTLY what are the normal symptoms of limp mode?

Anyway, I\'ve got a OMP coming through a friend in the States from an 1995 RX for $80 plus the postage... at least it\'s not killing me, but the fitting costs could well do!!

[kbareham]

To answer the question on limp home, mine started and ran normally with light throttle. Up to about 200mmhg vacuum on the boost guage all was well, but if you tried any more throttle, the engine just cut out. Lifting off the throttle made it run normally again up to this limit.

This means that you can only drive really slowly! Sorry to all those who were behind a blue FD at 55 MPH on the M3 :-)

In my case, the OMP was intermittently sticking, and every time I tried to diagnose the problem, it went away. In the end, the OMP completely failed, and was therefore easy to find.


Keith

[mattmaclennan]

Premix is 2stroke oil or similar added to the fuel in the tank, to act as a lubricant for the apex seals. The more fuel you inject, the more lubrication you are getting. The advantage of running it this way is that you can keep a highly modified motor lubricated as the OMP will only deliver enough lubrication to support the standard redline and the standard boost pressure.