starting issues

[Dirty325ix]

I just got my e30 running but there is a starting issue

If i leave the car overnight it starts first try and runs fine
But once i turn it off i cant get it to start
It turns and almost starts (barly hits 300rpm) then dies and i cant get it to start again. Tried putting it in gear and starting it and it moves the car but still fails to start

[dback]

Hello,

Had the same on two e30's. The engine coolant temp sensor grounds in a round plug under the intake manifold. If the connections are corroded the ECM thinks the engine is cold all the time and provides a really rich mixture. Adding to this is the throttle switch which gets filled with oil. I removed the maf and air filter housing, removed the throttle body & replaced the cork gasket for the coolant hoses. Cleaned the throttle body, replaced the throttle switch and adjusted it. Using a plumbers wrench I disconnected and cleaned the round electrical connector contacts near the oil return tube. I also replaced the valve cover breather hose from the valve cover to the throttle body. Any loose metal hoses in the throttle body, I secured with lock tite bearing retainer.
Carefully inspect the big maf boot for cracks. Once restarted and at operating temperature I fine tuned the maf mixture using propane enrichment. I also decided to install a new ect.

[dnguyen1963]

Smoke test is your best friend. Have a shop perform the test ASAP.