quote:

ORIGINAL: jkgray80

Just run your studs in & out a couple times & that will be good enough. As for ''''''''''''''''no codes''''''''''''''''. I hate that about people, i.e. "Well the dang ole light aint on & since the computer is smarter than me , aint nuthin wrong" You can have whats called a '''''''''''''''' in perimeter''''''''''''''''  failure. It will take someone that knows what they are lookng at when scanning through the computer. The info is there, they just arent seeing it. If you have emissions testing in your state, look for a state approved emissions repair shop.

quote:

ORIGINAL: hquick

Yeah....need to get it on a scanner. CMP retard needs to be set at +/- 2 deg. But I don''''''''t think that''''''''s your issue.
Did you replace the dizzy...or atleast check the gear? They wear BADLY and cause all sorts of issues.
Have you had a crank relearn done since installing the new motor?

quote:

The Crankshaft Position (CKP) sensor sends pulses to the PCM as the reluctor wheel teeth rotate past the CKP sensor. The PCM uses the CKP pulses to synchronize the ignition and fuel injector operation, and to time the interval between each CKP pulse. The PCM determines when an excessive change in crankshaft speed occurs by comparing each new time interval with the previous interval. A misfire causes an unexpected change in the crankshaft speed. A certain amount of acceleration/deceleration is expected between each firing stroke, but if the crankshaft speed changes more than an expected amount, the PCM interprets this as a misfire. The interval between CKP sensor pulses is extremely small. At high engine speeds, slight variations in the following components make misfire detection difficult:

Crankshaft
Reluctor wheel
CKP sensor
The PCM learns variations during the Crankshaft Position System Variation Learning Procedure. The PCM compensates for these variations when performing detect misfire calculations. Only a scan tool can command the PCM to perform the Crankshaft Position System Variation Learning Procedure again.
Perform the learning procedure after the following actions:

A PCM replacement
Any operation or repair involving the crankshaft, the CKP sensor, or the CKP sensor to reluctor wheel gap relationship.
An engine replacement.
The ignition switch is in the ON position until the battery is drained.


FWIW, this is lifted directly from the GM service manual.

quote:

ORIGINAL: hquick

Dizzy = Distributor so the gear on the bottom of the distributor.

When you replace the motor or PCM (computer) in one of these vehicles you ''''usually'''' need to perform a ''''crank relearn''''.
Found this description on another site:

quote:

The Crankshaft Position (CKP) sensor sends pulses to the PCM as the reluctor wheel teeth rotate past the CKP sensor. The PCM uses the CKP pulses to synchronize the ignition and fuel injector operation, and to time the interval between each CKP pulse. The PCM determines when an excessive change in crankshaft speed occurs by comparing each new time interval with the previous interval. A misfire causes an unexpected change in the crankshaft speed. A certain amount of acceleration/deceleration is expected between each firing stroke, but if the crankshaft speed changes more than an expected amount, the PCM interprets this as a misfire. The interval between CKP sensor pulses is extremely small. At high engine speeds, slight variations in the following components make misfire detection difficult:

Crankshaft
Reluctor wheel
CKP sensor
The PCM learns variations during the Crankshaft Position System Variation Learning Procedure. The PCM compensates for these variations when performing detect misfire calculations. Only a scan tool can command the PCM to perform the Crankshaft Position System Variation Learning Procedure again.
Perform the learning procedure after the following actions:

A PCM replacement
Any operation or repair involving the crankshaft, the CKP sensor, or the CKP sensor to reluctor wheel gap relationship.
An engine replacement.
The ignition switch is in the ON position until the battery is drained.


FWIW, this is lifted directly from the GM service manual.