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. I replaced the fuel pump and filter, checked for spark, and checked that the EGR wasn't stuck (don't know how well it is working, but its not stuck)
Cars & Trucks - GMC - Safari - 1988 GMC Safari
Answers & Comments
Hello, holding the pedal to the floor overrides the computer and causes it to stop pumping fuel to the injectors thinking the engine is flooded and you are trying to clear it. Since the engine starts like this, it's an indication that one or more of your injectors are leaking. The high idle supports this since there will be excessive fuel in the combustion chamber.
Hi, I wouldn't mess with the timing yet. I did intend to mention your spark plugs. I would expect them to be fouled and/or "wet" from the excess fuel. The intermittent spark could be still in the rotor/cap assembly, or take a look at the coil. Check the connections at the coil and the actual coil wire going to the distributor. Make sure all of the spark plug wires are seated tight on both ends.
The injectors deliver different amounts of fuel depending on the engine operating conditions.