Changed plugs now it misses.

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Mar 27, 2007 | 10:23 AM

#11

ZR1 DREAMING

TECH Senior Member

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Joined: Aug 2005

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From: Ham Lake, MN

Gap @ .035 and re-check all plug wire connections at plugs and coil packs.

Mar 27, 2007 | 05:58 PM

#12

GTOsRamairSilverado

TECH Apprentice

Joined: Feb 2007

Posts: 386

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From: Houston, Tx.

Quote:

Originally Posted by LOGICUSER04

I just finished changing my plugs on my 5.3, and now it misses under load. It does not miss when it is at idle just when it is under load (taking off from stop). I used the NGK TR 55s and reused the stock wires. And i gapped them to .055.

i had the same problem with my truck and i used the same pulgs tr55's. I took the plugs out and tested them with a digital multimeter and found that i had 3 bad plugs. i took them back to oreillys and they exchanged them. put the new ones in and the truck worked fine. You might want to check the plugs. mine didnt physically look damaged but they were not working.

Mar 28, 2007 | 08:35 PM

#13

LOGICUSER04

Thread Starter

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Joined: Jun 2006

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From: Corpus Christi, Tx

How do u check the plugs with a multimeter.

Mar 28, 2007 | 08:50 PM

#14

bigbadwolf54

13 Second Truck Club

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From: Bella Vista, AR

use an ohm meter and check from the electrode (the pointed tip on the bottom, NOT the ground strap that you adjust gap with) to the tip(where the wire clips on) ...should be a resistance , if none or higher than the others youve got a bad plug.