Re: 88 e32 735i COLD starting problem

[ebelmont@xxxxxxxxxxxx]

Hello Alex, 

 Thank you for the reply. I actually had the Fuel injectors redone and
still the car refuses to start? 

Emilio

At 11:45 AM 03/02/03 -0600, alex.fadeev@domain.elided wrote:
>ebelmont@domain.elided wrote:
>> 
>>  I need some help with a problem I am experiencing with my 735i 
>> during cold mornings. The car does not start when cold or left 
>> over night for a long period of time. Moreover,  As soon as I 
>> pull the fuel pump fuse out the car starts up and I place the 
>> fuse in the car is ready to go. 
>
>Emilio,
>Sounds like your engine is over-flooded with fuel during cold startups. 
>Have you checked the spark plugs? Are they bathed in fuel? The most common 
>explanation would be that your fuel injectors are leaking. The longer you 
>keep the car parked, the more fuel they leak that eventually will keep the 
>car from starting. Attempting to start the car with a disabled fuel pump 
>clears the cylinders and eventually the car starts.
>
>> The remainder of the day the car will start regardless of temperature.
>> I have since tried the following to remedy the problem. Complete tune 
>> up. fuel injectors have been rebuilt, 
>
>Hmmm, there goes my theory. 
>
>> new thermo-time switch and fuel pressure regualtor? 
>
>Not sure what thermo-time switch is, but a flaky fuel pressure regulator 
>could certainly flood the engine. 
>
>> I should also mention that once the car has started up it runs 
>> fine and very smooth, also it starts and operates fine during 
>> warm and very hot weather? 
>
>But not recently, right (unless you are regularly commuting to South 
>America)?
>The only difference between cold and warm/hot starts is that one of your 
>coolant temperature sensors tells the DME to enrich the fuel mixture 
>during cold starts (to compensate for fuel condensation on cold cylinder 
>walls). But if anything, most cold start problems are caused by that 
>sensor going bad and the fuel being to lean to start cold engine in cold 
>climate. But your pump fuse 
>I would start by verifying which way it is: flooding or starving. Than 
>keep digging from there.
>
>alex f

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