reigelser did pass the time by typing:
> I just tried the proposed starting procedure. KeyOnEngineoff for 10sec and
> then crank but no vroom. I needed a second try. When I turn the key I hear
> the Fuel pump for approx 1sec (I believe its the fuel pump).

Your correct, the pump runs (primes) the system for about 1 sec.

> With the engine
> cold there is a little delay in the throttle response. Between Pushing the
> throttle a bit and the revs coming up is a ~0.5sec delay. When I rev the
> engine at 2000 and go of the Throttle it goes all the way down to ~300rpm
> before it comes up to 800 again.0

That's normal. Your letting off the throttle is telling the engine to
go into braking mode.

> I checked the connectors (cleaned them with WD40)

WD-40 isn't a contact cleaner. Go to a local NAPA and get some
electrical contact cleaner that is safe for plastic. They make
two types, one is for cleaning alternators and you don't want that
one.

> and the ground cable:
> seem fine. Between engine block intake manifold and fire wall I measure ~0
> Ohm resistance, so the ground seems good.

That's good.

> I can not reset the error right know, because I don't have the reader
> available. But in the past I tried 50 times to reset the error and it is not
> erasable. Sometimes the light goes off, but comes back on immediately.
> Sometimes the device tells me, the error can't be erased.
> At the moment the Check ENgine Light readt out tells me 12, 24, 55. Don't
> know what 55 is, 12 means the PCM (or was it PMC) was disconnected from the
> battery. I am going to get the reader again to reset the error.

Recapping just a bit.

55 = end of codes
12 = battery disconnected within the last 50 power on/off cycles
and is only applicable if found with boatloads of other codes.
When you find it paired with lots of codes it is usually a bad
or loose battery cable. But it can indicate a faulty ground or
power wire to the PCM.
24 = Throttle position sensor input above or below acceptable
voltage. TPS signal does not correlate to MAP sensor.

With the ignition on, engine not running, backprobe the TPS.
One of the outer pins will have 5V on it. The other will have
zero. With the ignition OFF you should be able to probe between
the ground and the corresponding sensor grounds for the MAP, CPS, O2 sensor,
ECT and MAT sensors. Again, it helps to have the schematic with
your wire color codes. My 93 has black with light blue stripe as the
sensor grounds.

With the ignition ON, engine not running, measure the center pin.
Throttle closed > 200 milliVolts
Throttle wide open < 4.8 Volts
Anything in that range will adjust. The way you
adjust the TPS is by turning the key ON (engine not running)
then slowly cycle the throttle between full closed and full open
about 5-6 times. Then turn the ignition off.

See that second bit "TPS signal does not correlate to MAP sensor".
It could be the rubber hose between the MAP sensor and your inake has
a leak or the MAP sensor is failing. They can fail without setting
codes. They are of course bloody expensive and hard to test.

Just like the TPS sensor, the map sensor has three pins
A,B,C

A = Ground
B = output (.5v with ignition on, engine off)
C = 5V

There is no easy way of testing this doodad.


--
-- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
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