Re: [DML] Co2 set
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Re: [DML] Co2 set


It's amazing how little you guys know about the frequency valve and the 
mixture adjustment.... Let me say this - YOUR CO IS WRONG! It will need to 
be readjusted. The frequency valve needs to run all the time. If it doesn't 
run it means that the CO is far out of spec that the ECU cannot control it 
anymore. The CO is set with measurement taken before the catalytic 
converter. You need to replace the O2 sensor because the adjustment will not 
work. You CANNOT absolutely set the mixture by ear!! Why you might ask? 
Because you will not be able to tell if the FV is running at 60-40 duty or 
20-80 and that is important. Read the shop manual for the step-by-step 
procedure on how to set the CO.
No wonder so many people have problems with their DeLoreans and that so many 
think the car is crap. You absolutely cannot do some things by feel alone. 
The CO adjustment is the perfect example here. Of course you might say that 
'I've done it this way many times and it worked'.... right, the car will 
run, at emissions testing it will seem clean (thanks to the cat) but in 
reality the engine will run out of it's parameters either overheating from 
running too lean or washing the rings from running to rich. But you will 
find out about that when its too late.

Have the CO readjusted and don't forget to replace the O2 sensor if it 
wasn't replaced already.

Good luck

Tom Niemczewski
tomciodmc@xxxxxxxxxxx pl ->
VIN 6149 (in Poland!)
Save the dream so you can live the dream...

----- Original Message ----- 
> Hi again I had my c02 adjustment finally set professionally and the car 
> runs
> great.. I do have a question though.. the frequency valve does not run 
> when
> the car is warm though now... at least not at idle.. it does run when u 
> give it
> gas and let off and such.. but just idleing warm it doesnt.. the c02 was 
> set by a
> c0 machine so it is right now.. any suggestions on this..?? Is this bad??
> 15275

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