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I have a '88 GMC Safari, when I start it warm, I have to hold the pedal to the floor a long time (while starting). When it does start, it pours blue smoke for 15 seconds, and then idles really high. If cold, it alternately sputters and idles high at idl

what engine? does it have a

what engine? does it have a check engine lite?

4.3, the engine light did

4.3, the engine light did come on at one point, but I don't think it has stayed on consistently

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