lengthy Engine swap issue and question

[QiK]

Ok this is the situation...

first let me apologize for being so wordy I usually lurk on this site but I cant figure out what’s going on so:

I have had this 10/94 build obd1 m3 engine since last year. I purchased it off eBay as a package with the wiring harness and tranny.(Mistake 1) Turns out the engine had several exhaust valves that needed replacing because it was an early build m3 engine, and apparently they have a habit of failing.

I then had it shipped via central transport across country. (Mistake 2) the wonderful company decided to turn my engine into a piñata. When I received it was completely off the pallet and lying on its side. Almost every engine accessory was missing or damaged.

And finally I decided to rebuild the engine rather than junk it. (Mistake 3) Apparently they don’t make valve guides specific to 1995 m3 engines anymore. Each valve guide had to be lathed down the specific size needed for my engine valves.

I first tried to put the engine into my blue 1992 bmw and obviously the engine would not start. it turned over fine it just wasn’t getting gas. Also I realized that the head needed to be fixed too. I took it out and sent it to the machine shop. while the head was at the machine shop some chick hit and totaled the blue car so I opted to put the engine into my other white 325is daily driver.

Now that you have the background story here is the question.

I have it completely installed in the white car. I’m still having trouble getting the fuel pump to start pumping gas to the engine. Obviously I’m having a wiring harness issue; however I replaced the fuse and the relay for the fuel pump. I can manually turn the fuel pump by grounding one of the wires on the relay. The engine is still not starting after I get the gas up to the fuel rail manually. It sounds like the over all wiring harness isn’t grounding correctly but I’m totally at a loss any help would be appreciated

I noticed that some other electronics connected to the engine wiring harness aren’t working correctly but is that the wiring harness or the ecu I’m using?

** I’m using a 413 ecu

Any other random help would be appreciated as well

[BadGTho]

you def have a sensor or harness problem.

when you turn on the key do you get juice to the pump relay?

can you run the pump off the battery with a switch for now to get it to run?

as an aside.. rather than go through that pain with the head.. why not just buy a reman complete head.

[QiK]

the electric to the relay is working fine if i plug a wire into the brown/green stripe wire on the fuel pump relay the fuel pump turns on.

i tried to keep the pump manually turned on by a new wire from the relay to ground it out...the engine still didn't start, I'm assuming because the wiring harness issue is affecting other functions like the coils and spark plugs but i'm not sure yet I'll post any new info i get as i diagnose it

the engine is completely rebuilt the head issue was taken care of 2 months ago... i did consider it but i figured just rebuilding the head would insure me the most miles possible for the cheapest price because the 95 engine has frequent valve failure on the exhaust valves and by rebuilding them now i wouldn't have to worry about it in the future

[BadGTho]

it might be a fuel pressure issue.

[QiK]

na, the fuel pumps not turning on at all i have to manually turn it on by grounding it

[Paradigm_Guy]

There is a DME relay that could be the fault. It's near the fuel pump relay.

[QiK]

does the dme control when the fuel pump turn on and off or is it just like old cars when the key is turned on the fuel pump stays on

i reused the relay from my 325 wiring harness so i assumed that relay would still work with the m3 dme and wiring harness ill check now and repost in a bit

[carstereopro]

do you have spark?

if you jump the fuel pump and everything else if fine, it should start/run.

any chance you have the return/feed fuel lines reversed?

When I swapped the S50 into my 318ti we had starting issues, but they were EWS isues. After we figured the EWS system out, I grounded a wire in the harness and the car fired right up.

Since you have no EWS system, got to be a fuel, spark, or DME/wiring issue. Since you figured out how to force fuel into the system, checking for spark would be the next step.

[QiK]

thanks everyone for the in depth and educated answers.

and the return lines are not crossed i checked them last night

what is ews system? because my fault code reader is telling me that what your saying is correct.... there is no ews input. should there be?

also i am getting no spark, so im in the process of aquiring a new dme and gonna try that if no dice then i'll at least know its gotta be the wiring harness somewhere.

[QiK]

ok folks this is the deal in case any one is using the search later.

the 1992 bmw has no ews system to speak of. when installing a 95 or later m3 engine 95 percent of the dme available require a matching ews module before they will allow the car to turn on.

there are two ways to get a 413 that works without an ews system

1. purchase a "red" or "Burgundy" labeled 413 dme that are available in the early model 95 325

2. put a performance chip in your silver 413 designed to delete the ews feature as well as add some hp. pretty much any brand name performance chip will work aa, dinan etc...

this info was passed down to me by another user that i pmed so i cant take credit for the research

thanks every body for the input

[carstereopro]

Originally Posted by QiK

ok folks this is the deal in case any one is using the search later.

the 1992 bmw has no ews system to speak of. when installing a 95 or later m3 engine 95 percent of the dme available require a matching ews module before they will allow the car to turn on.

there are two ways to get a 413 that works without an ews system

1. purchase a "red" or "Burgundy" labeled 413 dme that are available in the early model 95 325

2. put a performance chip in your silver 413 designed to delete the ews feature as well as add some hp. pretty much any brand name performance chip will work aa, dinan etc...

this info was passed down to me by another user that i pmed so i cant take credit for the research

thanks every body for the input

If you can get a hold of the DME wiring schematic and pin configuration of the harness, you can also ground out the EWS trigger circuit to permanently disable the EWS circuit.

This is what I had to do when I installed an OBD1 drivetrain & DME into my EWS equipped OBD2 318ti.

[QiK]

yep its pin 66 on the dme... something needs to be done with pin 1 and 3 but its kinda weird something about crossing the wire not sure though.

[MMTuning]

You have an EWS issue. EWS was put into late 94 and up cars. You will need to contact Andy at AKG Motorsports. He can hook you up with all the necessary parts to get it running. I have had these issues with putting the euro s50-b32s into older E36s. www.akgmotorsport .com