P0303 to P0300 - Camaro Zone - Camaro Forums and News

Go Back   Camaro Zone - Camaro Forums and News > Camaro & Firebird Tech Forums > V6 Camaro and Firebird Tech

Reply
 
LinkBack Thread Tools
 
Old 03-18-2017, 10:05 PM   #1
New Member
Feedback Score: 0 reviews
 
Join Date: Mar 2017
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
P0303 to P0300

I have a 1997 Camaro 3.8L with a misfire condition. I have read a number of forums on this site about this issue but I haven't found one where the code changed.

Initially, the pulled code was P0303 which identified cylinder 3 as the culprit. I verified that I had spark, but noticed that the spark was not blue on a new plug. It was more like yellow orange. I swapped the coil packs but still pulled the same code. Although the plug wire looked fairly new, I put on a new plug wire to rule it out. The car ran great for about 30 seconds until the check engine light came back on. Now the pulled code is PO300 which is a random misfire. Obviously, the new plug wire had an effect, but I am not sure what do next. I plan on putting on a new wire set and changing all the plugs to AC Delco. If this doesn't solve the issue, I thought about changing the coil packs. Is there anything else I should focus on with the P0300 code?


Thanks
for4browns1 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-19-2017, 10:41 AM   #2
The "Senior" Member
Feedback Score: 1 reviews
 
NavyVet's Avatar
 
Join Date: Jan 2010
Location: Jacksonville, FL
Posts: 18,213
Thanks: 49
Thanked 1,212 Times in 1,087 Posts
Garage
Take the ignition control module to an auto parts tore and have it tested.
Make sure they test it several times to ensure it Is heated up.
__________________

96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
Original owner, 207k miles and counting.
Total engine rebuild at 187,020 miles. AIR delete, bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs.
Custom leather interior at 190k miles. Total repaint 193k Miles
NavyVet is offline   Reply With Quote
Old 03-19-2017, 08:47 PM   #3
New Member
Feedback Score: 0 reviews
 
Join Date: Mar 2017
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Hi:
Thanks for the reply. I brought the Ignition Control Module to Autozone today to be tested. The guy tested it a number of times and it tested ok. I also checked the ohm readings on the coil packs and they were all in spec. The guy at Autozone recommended that I spray water in a mist on the plug wires and listen for a decrease in RPM's to check for a wire issue. I will give this a try.

Thanks
for4browns1 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-25-2017, 08:02 PM   #4
New Member
Feedback Score: 0 reviews
 
Join Date: Mar 2017
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
I swapped plug wires to rule out an issue with the plug wire. The car ran for 10 minutes before the check engine light came back on. Before it was coming on within 30 seconds. It was the same error code as before, P0303. I was slightly revving the motor during this time. It seemed that the check engine light would only come on during idle. I am kind of at a loss of what to check next. I am thinking about changing all plugs to ac delco and also plug wires. I have read that GM cars are not fond of Bosch plugs. This is what is in the car now. What else should I check?

Thanks
for4browns1 is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
P0122 p0300 droner90 V6 Camaro and Firebird Tech 15 02-10-2015 05:46 PM
P0300 code droner90 V6 Camaro and Firebird Tech 10 01-13-2015 06:43 PM
P0300.... again Srgflo09 4th Gen (1998-02) Camaro and Firebird Tech 10 03-14-2012 08:07 PM
p0300 and many others!!!! DecencyxDefied 4th Gen (1998-02) Camaro and Firebird Tech 9 01-22-2011 09:12 PM
P0300 77k5 4th Gen (1993-97) Camaro and Firebird Tech 5 05-22-2010 10:23 PM


Powered by vBadvanced CMPS v3.2.3


All times are GMT -4. The time now is 04:56 PM.
Powered by vBulletin®
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.6.0
Copyright © CamaroZone.com

CamaroZone.com is in no way associated with or endorsed by General Motors or Chevrolet.