E34_525i

Thanks Andy! We didn't remove the ecu, as the loom was never removed from the car. My mate only has the stats off. but I'll txt him to print off that stuff while he's at work today. I don't think we changed the CAS, so that could be faulty. We still have the complete parts car. So swapping any bits or bobs is no problem. As always, it's just process of elimination. But you need to know what you're looking at, to reach the finish. Thanks for the helps guys. Great forum!

Thanks mate! That's the kinda advice I was looking for. Where is the ecu located? And are the pins numbered, or do you have a pinout? The manual my mate downloaded is better than nothing, but the wiring diagrams are pathetic. I did still the hoses into a receptical prior to key turning.

I'm usinf my mates account to post this, as I tried for ages to create my own account, but the website kept saying I got the code wrong/asking me questions I had to google the answer to. (I'm not a beemer guy) Anyway, I've been helping my mate try and fix his 1988 NZ new factory manual E34 525i. It has the single ohc M20B25 engine. About 18 months ago, it dropped a cylinder. He tried swapping out the injector, and the spark plug and lead. Turned out it had two broken rocker arms/cam follwers. even swapping those didn't bring it onto all 6. So Rather than trying to fix it, he started swapping in another engine from a donor car he bought. The previous owner of that car suposedly had $3k in recipts for having the motor overhauled. (My mate didn't get the recipts, so like "it's got a fresh engine bro" on trademe, we have to take that with a grain of salt) That said, it was VERY clean under the cam cover. The cam was in very good condition. (unlike the old motor, where the cam was f-d) He got the replacement longblock bolted in. Then life dished up one of those curveballs, (sh*t happenes) and the car was parked up untill now. Her indoors has decree'd that he has too many cars. (He does too) and after he bought another one recently, the beemer has to gtfo. So we've started trying to get the bastard running. Which brings us up to where we're at now. We refitted the injection manifold, and reconncted all the plugs etc. Hooked the fuel and return lines up the fuel rail. After much time was spent doing battle with it, the damn thing refused to fire. I pulled the line off the rail, and no gas comes out when the the key is turned/when cranking. I don't know bout bmw's, but nissans prime the pump for a few seconds when the ignition is switched on. We aren't seeing jack sh*t. (it aint never gonna go till we do) The annoying thing is that apart from the motor running on 6, it still ran prior to being torn down. Before I resorted to asking here, I did some googling. I read somewhere that some BMW's rely on there being spark before the fuel pump will pump? (Which sounds crazy if you ask me) Now I don't know if that's the case with this car, but there is some kind of pulse sensor(?) on number six spark plug lead. We found a plug on the loom which seemed to fit the plug on the other end of this "sensor". Also, given that car makers love to change things with no good reason, we reused the manifold, tps, afm etc etc off the OG motor from this car. The workshop manual we have ins't very good. Any idea where I can find the fuel pump relay? Also, the oil level sender fault is coming up. (I didn't see this, but my mate said it said this) He thought maybe that's why it wouldn't go? (I doubt this) Where is the oil pressure switch on one of these? The one in the bottom of the sump looks more to me like an oil level switch. (And old 13B I had once had one of those) My mate is going to swap the og one back onto the new engine. Sorry about the essay. Also sorry if I should have searched for the answers. Any advice would be appreciated.

as the title says, does anyone have one for sale? non airbag type thanks Karl

Hi All, I have recently re-lit the BMW flame after owning a E30 320i around 9-10 years ago I Purchased a 1991 525i off a work mate to do up and sell but decided to hold onto it. unfortunately it didnt last long, I lent it to a friend and it was involved in an accident and ended up getting written off. So I then decided i would shop around for another one, I had a couple of requirements for the replacement car, it had to be manual and if possible have leather interior. I found a 1988 NZ New 525i manual with leather for sale in Wellington So I promptly purchased it. The Black car has a M50B25 with 150kms on the clock, and the White car has a M20B25 with nearly 270kms, so the long term plan is buy the wreck off the insurance company so I can put the M50B25 into the white car with the manual box. I see there are a few people who have done that conversion so I will no doubt be asking a few questions, mainly in the wiring department cheers Karl