[DML] Re: Help me!!!!!!!

["Harold McElraft" <hmcelraft@xxxxxxx>]

The backfire thing is probably caused by an exhaust leak at or near 
the manifolds or crossover pipe. Until you are able to get a good CO 
reading it is hard to say about the idle. More than likely there is 
a vacuum leak you haven't located yet - maybe the vacuum advance 
shut off valve is still off allowing the spark to stay advanced, 
maybe the manual idle screw is open, maybe the seals at the intake 
tubes just after the butterflies are leaking. It sounds like you are 
close but need to be very methodical and absolutely sure of each 
application function and check now. You might start a checklist and 
go back over everything to be sure you haven't overlooked something.

Harold McElraft - 3354

--- In dmcnews@xxxxxxxxxxxxxxx, "painterdave72" <painterdave72@xxxx> 
wrote:
> 
> 
> Hey all please give me some insight to this freaking problem.. My 
car still does not 
> idle smoothly... or rather the engine vibrates at idle..I ahve 
just installed all new fuel 
> injectors and the car runs and accelerates excellently... I have 
done a 
> commpression test on the cylinders and they all have great 
pressure.. I have tested 
> the fuel pressure and it is within parameters and holds pressure 
fine.. Where i have 
> the c02 screw set now is alittle richer from wehre the car dies 
when u lean it out.. 
> that is why i think it shudders at idle,, but if i make it any 
richer the car does the 
> annoying backfire thing out the exhaust.. its now excatly 
backfireing though its just 
> like when u drift down a hill on a motorcyle with straight pipes 
and let off the gas the 
> rumbleing in the exhaust.. i do have a free flow exhaust on my car 
with no cat 
> convertor just straight headers to the muffler.. some mechanics i 
have talked to 
> seem to think it is a result of the exhaust but some people such 
as John Hervey 
> think it is still not right.. I dont think the engine should 
vibrate at idle either.. cause 
> when u give it some gas it stops right away..if i do richen it up 
till the frequency 
> valve shuts off it idles much better but is way to rich and does 
the thing in the 
> muffler.. i am so tired of messing with this.. the car runs 
greatly except for this.. i do 
> have a rebuilt warm up regulator also.. and every other sensor on 
the motor is new 
> say for the actual fuel dist and the accumulator.. and the idle 
speed motor.. Any 
> help?? please?? Thanks..Dave..Vin.. 15275...








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