325is with fresh s52 obd1 swap. No spark, No fuel

[petrothegreat]

I just finished up swapping a freshly rebuilt s52 into my 325 in hopes of having a more competitive track car, for moar funner times! But as usual nothing goes as planned. I originally thought fuel was my only issue, so tested DME relay, fuel pump relay, and fuse(electrical is my nemesis!) Then I decided to check for spark and there was no spark either, but car does crank. So while researching the obvious hit me. Check codes. I received a 1281 which is low voltage to DME (reset codes, disconnected
DME and battery for approx. 20 min (no longer pops)), and a 1223 which is a head temp sensor(still waiting on turner temp splitter). I will be contacting turner today to ensure the chip I received is proper one for my DME. I also checked my crank sensor ohms which was within spec.

I find 99% of needed info from research and knowledgeable people around me, but im stumped here. Can someone offer experiences, knowledge, or next step I can take

[JEC928]

Does battery deliver 12 volts or more?

[petrothegreat]

Does battery deliver 12 volts or more?

Yes just over 12 volts

[JEC928]

Well I'm stumped too. Bump!

[jcbrown630]

Check ALL the grounds. Poor grounding can wreak havoc in electrical situations.

The connectors and connection locations on the body must be clean bare metal.

[petrothegreat]

Check ALL the grounds. Poor grounding can wreak havoc in electrical situations.

The connectors and connection locations on the body must be clean bare metal.

I have checked all grounds. I just downloaded schematics for my chassis and I plan on checking the whole system in the next couple of days. After yesterdays brief diagnosis, I want to say I have an open or short between pin 87 on fuel pump relay, and fuel pump connector. I was however going off of an idiot light, but I plan on borrowing a multimeter when I go through the whole system.

[ChuckDizzle]

I had to override EWS for my OBD-1 s52 swap, my first chip was from Turner as well. The car would crank endlessly but wouldn't start. I clipped the EWS and the car fired up right away.

[petrothegreat]

I had to override EWS for my OBD-1 s52 swap, my first chip was from Turner as well. The car would crank endlessly but wouldn't start. I clipped the EWS and the car fired up right away.

What do you mean by override ews??. I did clip wire 66 on the dme connector, and the chip has software for ews delete.

[petrothegreat]

bmw.jpgThis was last event last year..in DE

[jakermac]

What engine harness, and what crank position sensor are you using?

[petrothegreat]

What engine harness, and what crank position sensor are you using?

Harness out of the 325i and im using obd1 cps