No spark, No injector pulse

[thrillious]

I just put a motor back together after two years and the fuel pump turns on and the car turns over but i have no Spark, or injector pulse. The opti-spark in new and the computer was programed by Fast Chips 2 months ago... it is a 97 camaro LT-1. i want to know if any one has any ideas...

[TraceZ]

Try this

HERE is a link to an article that will help. I plagerized it from somewhere a long time ago, so I can't give credit to whoever wrote it.

[Injuneer]

Have you put a scanner on it to check for codes? Faulty low res signal from the Opti will shut everything down. There is a code for that condition.

[fastTa]

Chances are if you fix the low res (4 pulse per crank revolution) you will also be fixing the fueling problem.

BTW, interesting article:

http://www.charm.net/~mchaney/optisprk/optisprk.htm

[Joe 1320]

By any chance the security light is on? The VATS system (pellet resistor) in the key will cause a no start if it senses the wrong resistance or if the circuit for whatever reason screws up. The column mounted ignition switch can also do this.

Just in case........

here is a proceedure to troubleshoot the ignition system.

Step 1. Connect a spark plug tester to a spark plug wire and
check for spark while an assistant is cranking the engine.
Check each plug independantly. this checks for open
spark plug wires. Spark in one or more than one wire
indicates the problem is in spark plug wires or optispark.
If no spark exists, go to step 2.

Step 2. Check for spark at the coil wire with the spark tester
while cranking the engine. A spark indicates the problem
is in the distributer (optispark). If no spark go to step 3.

Step3. Perform check on ignition coil.
a: Unplug coil electrical connector and check pink wire for
12v. If power go to b.
b. using ohmeter low scale, hook up the leads to the
primary terminals on the ignition coil. Should indicate
very low resistance. If not, replace coil.
c. Using the high scale, hook up one lead to the primary
terminal, the other to the secondary terminal. Should
not read infinite resistance. If it does, replace coil.

Step 4. Disconnect the ignition module connector and with the
key on, check voltage at terminals A and D on the harness
side of the connector. (pink/black and white/black wires)
If under 10 volts check for faulty circuit from the ignition
module to the coil or check for grounded external coil
circuit. If 10 volts or more, change the voltmeter to a/c
scale and measure voltage on terminal B while engine is
cranking. (white wire). If 0 volts, Have ECM checked. If 1-
4 volts, with the key off, disconnect the module
connector. Install a LED type test light on the positive
battery terminal and probe terminal C on the harness side
of the connector (black wire). The light should illuminate.
If not, check ground wire in the harness to the module. If
the test light is on, go to step 5.

Step 5. Remove the coil wire from the coil and ground it to the
frame. Connect LED test light into the optispark harness
connector red wire terminal C. The harness connector that
you will use is located on the passenger side of the
engine up near the fuel rail. You will need to insert a back
probe pin into terminal C. If the test light flashes when an
assistant cranks the engine, the optispark is suspect. If
no flashes, replace the ignition module.