Re: [doc] couple of tech questions

[Martin Gutkowski - DMC Ltd <martin@xxxxxxxxxxxxxx>]

Lambda system will not raise idlespeed. Nothing to do with fuel will 
affect the idle speed. Dodgy starting, yes, dodgy running, yes, but not 
the idlespeed. I would next check your timing and your vacuum advance 
mechanism.

...or stop farting about and bring it in <grin>

The more you run it "wrong", the more likely you are to cause real 
damage. For example running it rich will soak the oil in fuel and reduce 
its lubricity. You may need to change out the oil to prevent premature 
bore wear, cam wear etc etc.

Yes we stock the lambda relay - I found a source of alternatives which 
cost the same as regular relays (£3.50 each) as opposed to Bosh's £12.

RPM relays can be repaired or alternatively they're $40 from DMC Texas

Martin
DMC Ltd

blackaddertoo wrote:

>Hi Martin
>
>Pump ran till i cut the ignition...i think the rpm relay may have an 
>intermittent fault.
>
>so do you stock the rpm and lambda relays?...might as well change 
>them as they're 25 years old anyway for a guess.
>Maybe this is the root of my problems.
>i did have the car running (about 1200 rpm and hunting a bit) and 
>warmed a fair bit.
>temp guage 1/4 to 1/2, and even heater works!.
>then stopped the engine and would not start very well.
>jumped the cold start valve, ran then revs dropped and cut out.
>Gas pedal did not help.
>this is pretty strange, and i am now suspecting the lambda system, 
>rpm relay etc.
>will disconnect the lambda sensor (should run rich?) and i do have a 
>dwell meter which i assume i can take a reading off the diagnostic 
>socket.
>i think warm should read 50-60% if i remember right.
>
>Regards
>
>Steve
>
>
>
>--- In doc-uk@xxxxxxxxxxxxxxx, Martin Gutkowski - DMC Ltd 
><martin@xxxx> wrote:
>  
>
>>
>>blackaddertoo wrote:
>>
>>    
>>
>>>does anyone know the exact use of this? deos it suppress radio 
>>>interference, or make sure there is no spark at the microswitch. 
>>>Does the D run ok without it?.
>>>
>>>      
>>>
>>It's to stop the stereo going "pop" when you drop to idle. Not 
>>    
>>
>present 
>  
>
>>on early cars, makes no difference whatsoever with a modern stereo.
>>
>>    
>>
>>>and my d carried on fuel pumprunning when it had stalled, untill 
>>>      
>>>
>i 
>  
>
>>>pulled the battery.
>>>
>>>      
>>>
>>Until you turn the ignition off? Or pull the battery? If the 
>>    
>>
>former, you 
>  
>
>>have either got a jerry-rigged setup or the RPM relay has failed 
>>    
>>
>(got 
>  
>
>>one in right now with the same problem). If it doesn't cut till 
>>    
>>
>the 
>  
>
>>battery's pulled, there's a wiring fault somewhere and the 
>>    
>>
>ignition 
>  
>
>>relay is powering itself. Rich J had this problem on 2727
>>
>>Martin
>>
>>    
>>
>
>
>
>
>
>
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