aca va el procedimiento para ajustar el ralenti, por si no lo tienes, ya que le has metido mano a todo
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You now need to set the idle speed on your vehicle. Start by jumping the A&B pins
on the ALDL (Assembly Line Data Link) connector under the dash. Pins A&B are on
the upper-right-hand side. These are the same two pins you jump to read codes
from the ECM. Now turn the key on (the Check Engine light should be lit) and
leave the key on for at least 30 seconds. The computer will extend the IAC
plunger all the way out to allow adjustment of the idle speed.
After the 30 second wait, unplug the IAC (square 4-pin connector on the throttle
body) WHILE THE KEY IS STILL ON. This prevents the ECM from adjusting the idle
speed while you make your adjustments.
Block the drive wheels, set the emergency brake, and start the engine. Set
the idle speed by adjusting the idle speed screw. The engine should be at
operating temperature for this. The exact setting is on the emissions label
on the radiator shroud, but in general, the idle speed should be about 500 RPM
in Drive, 700 in Park / Neutral, or if you have a manual transmission,
somewhere between 600-800 RPM. Remember that the truck is running during this
adjustment, so stay clear of the fan, and make sure it can’t roll or otherwise
be put into gear while this is done.
Once the minimum idle speed is set, turn the engine off, reconnect the IAC,
and remove the jumper from the ALDL connector. The TPS minimum voltage must now
be set. Turning the idle-speed screw may have moved the TPS idle voltage away
from the specification, so it should be adjusted next.
Connect a voltmeter between pins A (usually dark blue) and B (usually black,
or black/pink) of the TPS, and turn the key on. Don’t start the engine.
Loosen the two torx screws holding the TPS in place, but don’t remove them.
Rotate the TPS until the voltmeter reads between 0.45 and 0.55 volts, with
0.50 being ideal. Tighten the mounting screws (carefully, they thread into
soft aluminum) and re-check the voltage to make sure it’s still within range.
The best way to set the TPS voltage is with a scan tool. This way you can view
what the computer actually sees.