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- - Code po300 and po452 (https://chevroletforum.com/forum/silverado-fullsize-pick-ups-21/code-po300-po452-47887/)

Leifshannon

January 17th, 2012 3:50 PM

Code po300 and po452

Hey guys I got a 98 z71 5.7l and it started runnin really bad the other day missin and backfiring and sputterin and smellin raw gas out the exhaust. It threw the codes in the title so I replaced the whole spider assembly with the improved one. I got it back together and its still doin the same. I also checked the fuel pressure and its at 52psi running. Any input would help. Thanks

Leifshannon

January 17th, 2012 5:54 PM

Ha! It was the cap and rotor

rtg143

January 17th, 2012 6:22 PM

Glad to hear that you fixed it. Thanks for the update.

EinST

January 17th, 2012 6:47 PM

Just to be clear for others, that took care of P0300. Still working on P0452?

Leifshannon

January 17th, 2012 9:14 PM

It accually took care of both codes

EinST

January 17th, 2012 11:05 PM

Hmm, not to argue with success but I can't say I understand how. If P0452 comes back, keep in mind that it's an electrical problem on the FTP sensor circuit.

Leifshannon

January 18th, 2012 7:42 AM

Yeah im not sure either how that happened but ive checked it about four times since ive got it back together and its not showing up, maybe I wiggled a wire that needed wigglin.

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