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E36 M3 (1995-1999)

 
 
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Old 07-01-2018, 10:07 AM
M3 4L M3 4L is offline
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E36 s50b30us long start hard start 318ti

Here we go.
New here so give me a sec to catch my bearings, thanks.
95 318ti, has s50b30us swap.
Car caught fire right around the battery.
It was mainly cosmetic and some minor burning into the harness around the battery.
That issue has been resolved. New wiring harness and intake manifold.
Here is the rub: the car is a hard starting, long cranking bitch! It smelled like fuel something fierce. I inspected all vacuum hose and found several small issues I corrected, I won't bother with those details, those fixes seemed to cure 80% of the fuel smell. Occasionally I would have a back fire during startup.

Ok. Here is where I'm at currently. Still long cranks to start. Has no vacuum leaks, has fuel drainback check valve installed (discovered this on a fuel system leakdown test with guage), checked coolant temp sensor is good, mass air is working, injectors are fine they are not leaking or batch firing. No check engine light. Now, when car starts (you slightly pump the accelerator to start) it's great, no fuel smell or anything.

Why the hell is this thing LONG crank starting? It revs to 2500 when you start and returns to a normal cold idle. I can NOT hear a fuel system prime when you turn the key on to start. Don't know if these are both normal for Beemers or not. Some relays just started clicking today when I turn the key on (fuse panel under hood, never heard them before, car still starts same).

I have tore this apart several times to check harness, vacuum lines, and sensors.

Anything helps! Thanks people!
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