S50 help

[Siggo]

Coil pack ground it has only 1 on should if have 2

[Brianmoooore]

If the rev. counter bounces (I presume you mean more violently than just reflecting the change in engine revs. when the fault occurs), the fault is nothing to do with anything in the fuel system, or ignition coils.
The rev. counter is driven by processed signals from the crank position sensor, and what you describe is classic symptoms of a failing CPS, although a problem with a power feed to the ECU (such as a duff. DME relay) or a Fault with the ECU itself can give similar results.

[Siggo]

Ok he's replaced cps or so he tells me . Still having trouple with the relaye s most of them have 30 87 on the bottom of them .not sure I did the right one. Taken all of them out one by one to find out witch one was fuel and car still ran

[Brianmoooore]

I'm hampered a little by the fact that I'm not familiar with the S50 set up, but I'd expect the DME relay to be a lime green colour and have five pins.

[Siggo]

Great I know were that is. Will get on that tomo cheers

[Siggo]

Still no joy . Lasted abit longer did the wire bypass .two nuts missing on coil pack plus the ground was under the coil not between coil and nut. Blue relay behind glove box seems burn out taken that out. Ecu is warm but not to hot. There's no vacume when petrol cap is off just sound of pump. I have a cone filter and it's very hot we're it is could it be that sucking in hot air.will try and move it but panel needs cuting to get it away from every thing

[Brianmoooore]

the fault is nothing to do with anything in the fuel system, or ignition coils.

[Siggo]

That still does not help me bud. I'm no expert just doing what I can

[Brianmoooore]

It helps you a lot! It tells you what to NOT waste time and effort on.
Concentrate on getting the rev. counter to behave, and you'll probably find the engine fault is cured.

[Siggo]

True the rev counter only jumps when when car plays up but that might be cos me still on the gas and I'm trying not to stall

[Siggo]

Checked pipes best I can only thing I found was the petrol tank beather valve has the larger pipe cut with a bolt pushed into it. Should this run alway back to tank. Plus tried with petrol cap of was worse can ran about 10 min then dead. Waited to cool then all good got it back home. Trying new garage next week I trieda˜¥

[Bally]

Try these guys seem to be getting good reviews don't know anything about them myself
http://forums.m3cutters.co.uk/showthread.php?t=27326

[Siggo]

Yeah cheers matey I know the guy have used him years and he is good. it's his mate who put the engine for me and has who has since works for him but he won't work on modified cars anymore.strange I know so have taken my custom else were

[spook]

I would get a scanner on it mate, be carefull which one you buy as you will want one that fits the older style ports, i think any car over 2001 has the newer ones.

I had a non start issue last year that turned out to be a loose connection inside one of those plugs.

The scanner didnt pick that up but somehow it cleared the fault so i could drive it to an Indy.

[DanThe]

Unless the garage you take the car to is familiar with the S50 conversion in an E30 there is a good chance you will be going round in circles again, no amount of ecu scanning will tell you if a wire has been spliced wrong or is damaged, missing etc etc and not many garages want to do this work, same as your engine swap man

[Siggo]

I know he is the man to go to .i Have tried he just said no . It already had a 2.8 in befor when I bought it so all that side was all done just plug and play

[maggspower]

Don't try and frankenstein the fuel breathers. Leave it as per e30, i.e. breather run to N/S engine bay. The e36 breather can be a nightmare pressurising and vacuuming the tank. throw the little valve away, then block then block the holes. It will throw a code, but thats all.

I have just had real issues getting one of these to run right, they are very touchy about anything being out of parameters, because race engine innit.

Your problem certainly seems heat related, if it had not already been done then the CPS would be prime candidate. There are 2 cam sensors also, test them before replacing though. The MAF is critical on these, unplug it see if the problem persists. The ECU knows that its unplugged and runs an Alpha-N type map so removes it from the equation, before plugging it back in spray the inside of it with some electrical contact cleaner, I will stress again these things are really sensitive if not 100 percent right.

There is also the temp sender, its in the head just behind the oil filter housing. in an e36 there is one to do it all, so now you should have 2 brown one for the clocks and a black one for the ECU, this is the one that could possibly be at fault. Inlet will have to come off to access.

[Siggo]

Thanks for that. Il check that. Yeah defo heat related. It's had new air mass & cps. One more thing Im trying is coils .When I think about it it only happend since I've had I bigger rad fitted

[Siggo]

How do you post pictures thanks

[Brianmoooore]

How do you post pictures thanks

See the 'stickies' in the 'for sale' forums.

[Siggo]

Right managed to speak to the guy who fitted the engine. He has replaced the chips in the dme because he said he had trouple geting it to run . He said it is over fueling. I have the old chips.should I get then put back in. Could it be this. Car has been running fine for months tho before this problem

[Brianmoooore]

If it was over fuelling it would throw lambda sensor fault codes.

[Siggo]

Got a mobile diagnostics coming out so il see for my self what's showing cheers

[Siggo]

Right dam thing won't even start now. Fuel pump use to make a noise I can't here that now. Does it come on when car is going or should you here it with one turn of the key.

[Kos]

Just take it to someone who knows what they are doing like DanThe

[Brianmoooore]

Fuel pump is switched on by the (processed) signal from the crank position sensor. Everything points to a problem in this area, including not recording a fault.
As Kos says, get it to someone who actually understands how these things work.

[Siggo]

I have tried 2 machanic now and £ 1500 later still not right that's why I'm trying

[M3Pete]

You haven't tried the "right" mechanic, it would seem.

[Siggo]

True that. Been let down by 3 diagnostic guys today never tuned up or called back. Hopefully got one guy coming out tomo who has got great right ups.