View Full Version : flash code 1345 HELP!!!!???
09-05-2011, 08:29 PM
crank shaft position sensor. found a thread that said if you removed the dist. and installed wrong youd get this service engine flash.so brought number 1 to tdc compression stroke/which lined up the balencer and cover mark. installed dist.clocked it according to the mitchell bulliten in the aforementioned thread still got the s.e.s. light!!!!!!!!!! did this and re did this thinking i missed something several times. remove... reinstall....clear code......still comes on????? any help would be greatly greatly appreciated!!!!!!!! I HATE THAT LIGHT!!!!!!!!!!!!!!!!!!
You need to set the CMP retard to plus or minus 2I.
09-06-2011, 09:43 PM
cmp? how would i do this??
CMP sensor is the camshaft position sensor (found in the body of the distributer)
CKP sensor is the crankshaft position sensor(located in front timing cover on the pass. side underneath the crank)
You have pulled the distributer, and restabbed it, but unless you are really awesome, you wont have gotten it within plus or minus 2º.
I have been lucky and was able to get rid of the light by clocking the distributer, then revving, then clocking then revving until the light goes out, but the light comes on at plus or minus 10º or something, so its not 100% accurate. 5 degrees is NOT much.
You need to find a buddy that has a scan tool that has the ability to correct CMP retard on a 1996-2000 Vortec 350 L31 engine code R.
A scanner is attached to your under dash OBD2 port and the distributer is clocked until thespec is + or - 2º. Just be sure to rev the engine above 1000rpm after EACH adjustment of the distributer, this resets thescanner. if you dont do this, you will be chasing your tail.
This is where a buddy at a dealership is golden.
Here is the procedure
As for the timing distributer adjustment, the specs I found shows the distributer should be adjusted to:
The ignition timing cannot be adjusted. The distributor may need adjusting to prevent crossfire. To insure proper alignment of the distributor, perform the following:
1. With the ignition OFF, install a scan tool to the DLC.
2. Start the engine and bring to normal operating temperature. IMPORTANT: Cam Retard Offset reading will not be accurate below 1000 RPM.
3. Increase engine speed to 1000 RPM.
4. Monitor the Cam Retard Offset.
5. If the Cam Retard indicates a value of 0°+/-2°, the distributor is properly adjusted.
6. If the Cam Retard does not indicate 0°+/-2°, the distributor must be adjusted.
(Unfortunately my cheap scan tool doesn't show Cam Retard values)
Obviously if scanner doesn't support it, I'll have to look elsewhere
09-07-2011, 06:01 PM
ok makes alot more sense thanks
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