Re: [DMCForum] Flat acceleration curve/Fuel system issues- Need advice
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Re: [DMCForum] Flat acceleration curve/Fuel system issues- Need advice



Did you ever strip and clean your distributor? The bob-weights may be
gummed up and at full throttle there's no vacuum advance, under partial
throttle, the vac advance my be compensating for the mechanical advance
not working properly

Martin

cruznmd wrote:

>I am at wits' end with my engine right now.
>
>I'll describe the main symptom:
>
>When accelerating, or under a heavy load like hill-climbing, the
>engine bucks and the tach jumps a lot(seems to indicated a misfire or
>non-firing of some cylinders). These days I only get about 1/2 to 1/3
>pedal travel before the car does this.
>
>If I don't push the pedal beyond the "failure point", the car
>accelerates smoothly as fast as that much throttle will allow.
>
>I have checked the lambda with a dwell meter. Frequency valve buzzes
>away happily. I have tried cleaning the injectors with a special
>pressure rig that Vixen Dave lent me (engine runs off of the can
>contents). I have changed filters and tank pickupscreens several
>times. Mike C. and I have inspected my tank. It's clean with no
>floaties.
>
>Coincidentally, my idle regulator (only 1 year old) hums as is should
>but when you disconnect it with the car running, the idle doesn't
>jump or change. Idle is rock steady at 800 rpm. Does that mean I have
>a huge vacuum leak somewhere? I can't find one. My brass screws are
>CLOSED and the throttle linkage setscrews are set completely shut. I
>have a new O-ring on the idle regulator tube. I have the brass keeper
>ring. When I pull the CO screw plug the engine stumbles mightily,
>which Martin says should happen if all or most of the vacuum leaks
>are plugged.
>
>A fuel pressure test rig is in the mail, but I want to hear what you
>all have to say.
>
>Thanks,
>
>Rich A.
>#5335
>
>
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>
>Yahoo! Groups Links
>
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>.
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>




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