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Engine shut down? It has P1345 correlation code?

Tiny
HBMG
  • MEMBER
  • 1999 CHEVROLET 2500
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 215,000 MILES
When it gets warm the engine misses. Spark advance runs -2 up to 30 when it gets warm. Motor has 4k sunk original one trying to set time It has p1345 correlation code. New distributor, crank sensor. AC Delco ICM everything but ECM. Get a non communication also. Any answers out there? Truck listed above is a k2500.
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Wednesday, August 17th, 2022 AT 3:45 PM

12 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
So, the correlation code is because the distributor is a tooth off, I would put the engine on top dead center and then remove the distributor and turn it one tooth to properly align the rotor to the cap. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed. The no communication problem you will need to start a new question for because we only handle one problem per thread.

Please post your new question here, you must be logged in:

https://www.2carpros.com/questions/new

Let me know what happens.
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Thursday, August 18th, 2022 AT 9:48 AM
Tiny
HBMG
  • MEMBER
  • 6 POSTS
Have it TDC.
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Thursday, August 18th, 2022 AT 10:38 AM
Tiny
KEN L
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  • 47,513 POSTS
Okay, does the distributor line up with the images above. It even says if the distributor is off it will cause this code.
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-1
Thursday, August 18th, 2022 AT 6:51 PM
Tiny
HBMG
  • MEMBER
  • 6 POSTS
So, I did what you said matched up diagrams connected scanner to it. Still bucked and burnt com and came up?
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Thursday, August 25th, 2022 AT 9:34 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Were they off before? Also do you have spark plugs wires cap and rotor? And if so are they AC Delco?
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Thursday, August 25th, 2022 AT 5:18 PM
Tiny
HBMG
  • MEMBER
  • 6 POSTS
So here is where I am: I replaced ECM reset timing ran -2 for a bit. Now +24 also changed IAC, ICM, MAF, engine temperature. Sensor. And pigtail to crank sensor plugs wires cap rotor. Once I changed pig tail truck runs rough until engine warms up. Then runs better than it ever has.
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Thursday, October 27th, 2022 AT 9:35 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Okay, we are getting closer, can I ask if the engine has an exhaust leak before the primary O2 sensors? If so this can be the problem because it allows air to enter the system and fool the sensor.
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Saturday, October 29th, 2022 AT 1:56 PM
Tiny
HBMG
  • MEMBER
  • 6 POSTS
No exhaust leaks. Cats are hollowed out cheated 02 sensors even has new 02 sensors in it. It will run + 21 24 degrees. On timing. Tried relaxing crank sensor but fuel shut off wouldn't engage. Didn't before on old ECM either. Also, no codes.
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Saturday, October 29th, 2022 AT 2:40 PM
Tiny
KEN L
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Cheated the O2 sensors? Is there a code for the cat inefficiency?
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Monday, October 31st, 2022 AT 11:27 AM
Tiny
HBMG
  • MEMBER
  • 6 POSTS
Used spark plug foulers to space out. No 02 codes.
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Monday, October 31st, 2022 AT 1:35 PM
Tiny
KEN L
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Is the correlation code still present?
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Tuesday, November 1st, 2022 AT 11:35 AM
Tiny
HBMG
  • MEMBER
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No.
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Tuesday, November 1st, 2022 AT 1:44 PM

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