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1999 camaro MISFIRE

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Old Jun 26, 2017 | 09:48 PM
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Default 1999 camaro MISFIRE
Just finished putting my ls1 into my 1999 camaro the motor was out of a corvette, it starts right up no problem but sometimes the idle will drop up and down it came up with P1345 while driving down the road the misfire will get bad then just go away it feels like but it has no trouble starting only thing that's seems to be effected would be idle, misfire will driving and the MPG What could be causing this?!?!?
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Old Jun 26, 2017 | 10:37 PM
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https://ls1tech.com/forums/generatio...cs-inside.html

Post #9
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Old Jun 26, 2017 | 11:24 PM
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Originally Posted by 93Rat
What about #9? I looked up the code and found that it says crankshaft position sensor but it starts just fine and the tach works so it couldn't be that right? Could I just need to get the crankshaft position sensor and camshaft position sensor relearned?
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Old Jun 26, 2017 | 11:46 PM
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Did you change the plugs/wires/fuel filter?
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Old Jun 27, 2017 | 02:24 PM
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It has new plugs and wires I replaced the fuel filter around 7,000 miles before the new motor but it comes up with the P1345 code for a crank sensor but it still starts fine
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Old Jul 3, 2017 | 06:26 AM
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Check the end play on the crank..
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Old Jul 7, 2017 | 01:32 PM
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+1 crank end play.
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Old Jul 7, 2017 | 02:35 PM
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Originally Posted by WHITEZ28*
Just finished putting my ls1 into my 1999 camaro the motor was out of a corvette, it starts right up no problem but sometimes the idle will drop up and down it came up with P1345 while driving down the road the misfire will get bad then just go away it feels like but it has no trouble starting only thing that's seems to be effected would be idle, misfire will driving and the MPG What could be causing this?!?!?
P1345 is not a valid code for a 99 Camaro or any Gen 3 vehicle. It is Vortec 305, 350 Crank Sensor Cam sensor correlation code. It sets when the Cam sensor in the distributor is out of correlation with the Crank sensor. Are you sure it is not P1336 Crank sensor variation not learned. I would expect that changing the engine and not performing a CASE Learn.
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Old Jul 7, 2017 | 02:41 PM
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Originally Posted by 2xLS1
.......sensor in the distributor ......
HUH??? In the WHAT???
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Old Jul 7, 2017 | 07:13 PM
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OP needs to clarify DTC
Think about it
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Old Jul 8, 2017 | 08:17 PM
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Default Crano play
Originally Posted by Old Geezer
Check the end play on the crank..
There is no play in the crank, but I was thinking would i just need to relearn the crank posturing sensor along with the cam shaft positioning sensor have them relearned to the computer?
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Old Jul 12, 2017 | 10:12 PM
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what was done to the motor recently? Cam change or anything related to that?
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