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honerboys's Avatar
 
Join Date: Feb 2011
Location: denver
Posts: 755
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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
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84 928 S
Old 06-10-2018, 12:09 PM
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Petie3rd
 
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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
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Old 06-10-2018, 01:00 PM
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hey merlin - thanks for the info - i checked that 3 way plastic connector - it appeared to be ok and all hoses were tight - i replaced the check valve on the pump even though the old one seemed to still be working - when i loosened the banjo junction there was plenty of pressure in the line up to the engine - what regulates that pressure and decides when it's enough and returns the excess to the tank? - is that the job of the left or right side fuel pressure regulator or do they work in tandem, with one monitoring the left bank and one the right? - it still starts hard when warmed up - i did notice that if i shut it off for less than 5 minutes it starts easily more than that and it's harder to start - i'll check for fuel in those vacuum line next - also i might try adjusting the idle mixture screw as the exhaust smells a little too gassy - or it could be leaky injectors - i did run a bottle of techron through it last year - didn't notice any difference - another thing maybe unrelated is the idle surges a bit - 50 rpm or so
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84 928 S
Old 07-08-2018, 07:41 AM
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Join Date: Mar 2010
Location: Texas
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Honer,
Check your temp II sensor. Faulty Temp II can make your car really hard to start. It's easy to test and easy to access.
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Old 07-09-2018, 08:22 PM
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