Hard/rough start...

[Stephen Ankney]

Listers,
I'm having some sporadic problems recently with starting my 88 5000s. Heres 
what is happening sometimes: Turn over ignition and it takes anywhere from 
5-10 seconds to engage. Normaly takes 2-3 seconds tops. When it does engage 
the engine idles very rough. Alot of shaking. Seems like it is not firing on 
all 5 cylinders. It is so bad sometimes that I usually have to turn the car 
off and try again!

Sometimes if I just let it idle like this it will smooth out on it's own or 
stall. Most of the time I just keep giving it some gas until it clears up. 
Once it smooths out the car drives perfectly for hours. If I try restarting 
the car right after I turned it off it fires right up but if I leave it for 
more than 20 minutes it usually does the rough start thing again...any ideas 
what it could be?

Also It's done it twice on cold starts too so I dont think it's related to 
hot start problems...and remember this condition has been sporadic. Though 
it is starting to happen more frequently now...

The car has had a recent tune-up minus wires/rotor/cap(they were all still 
"good" at the time) Car also has had a new differential pressure regulator 
put in less than a year ago...new injectors/fuel filter too...

No fault codes stored either...Help!

Thanks,
Steve Ankney
88 5k
Holland, Michigan


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