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Join Date: Feb 2011
Location: denver
Posts: 728
warm starting issue

i've seen this posted for the early CIS cars but mine is an 84 - car used to start when cold in about one revolution on the starter but when warm it would take 20-30 seconds - well this has gradually gotten worse - now it takes about 20-30 seconds when cold and last night it took me about 3 -4 minutes to get it to catch - i changed out the FI relay,,no effect - i can hear pump running - last night after it caught and i drove it home i smelled gas - tried to trace it and it seemed to smell the most in the passenger front wheel well - is that where the carbon canister is - i had changed out all the fuel lines 2 years ago and none look like they are leaking now - so.. what do you think is going on? - leaky injectors might explain the hard starting but not the gas smell - once it starts the car drives great - no stalling or hesitation - could the check valve on fuel pump do this? - i had cleaned the ground points but that was also 2 years ago - would they have corroded again that fast? - thanks
84 928 S
Old 06-10-2018, 12:09 PM
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Mrmerlin's Avatar
Join Date: Jul 2000
Location: Philly PA
Posts: 4,487
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I would replace the 3 way junction in the RF wheel well, thats whats broken.
also time to remove the rust and metal collars in the washer fill tube and tank inlet, drain the tank out.
Most likely your fuel pump check valve is leaking, order and new check valve, it comes with the 3 sealing washers,
a fuel filter if yours is old,
and the short hard line from pump to filter.

I would also suggest to run a bottle of Techron and 6 oz of MMo in the fuel,
also check the dampers and FPR for the fuel smells in the respective vacuum lines
^^^ Stan ^^^ 2011 BMW K1300S Magma red
1988 S4 Auto , Elfenbein Perlglanz, Pearl Gray
1988 S4 5 sp, Black / Black leather/ Carmel carpet
Old 06-10-2018, 01:00 PM
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