Hummer Forums by Elcova  
Forums - Home
Source Decals

Source Motors
Custom. Accessories.

H2 Accessories
H3 Accessories
Other Vehicles

H2 Source

H2 Member Photos
H2 Owners Map
H2 Classifieds
H2 Photo Gallery
SUT Photo Gallery
H2 Details

H2 Club

Chapters
Application

H3 Source

H3 Member Photos
H3 Classifieds
H3 Photo Gallery
H3 Owners Map
H3 Details
H3T Concept

H1 Source

H1 Member Photos
H1 Classifieds
H1 Photo Gallery
H1 Details

General Info

Hummer Dealers
Contact
Advertise

Sponsored Ads
















 


Source Motors - custom. accessories.


Go Back   Hummer Forums by Elcova > Hummer H3 Discussion Forums > Technical Discussion and Customizing your H3

 
 
Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 08-24-2008, 07:43 AM
hawaiih3 hawaiih3 is offline
Elcova Rookie
 
Join Date: Aug 2008
Posts: 7
hawaiih3 is on a distinguished road
Default P0300//mulitiple misfire

1st time check engine came on was while I was in line at a drive thru so I ran a scan with a Gynesis and pulled P0303 and P0300 so I replaced all plugs
with iridium (denso)-cleared codes and ran another scan. No codes. However, the scanner can run live data stream and as I am running live data I can see mulitiple misfires and it records the count in history on each plug . But the misfires only occur during idle and not under load like cruising speed on the highway. for instance if i rev the engine like just tapping the throttle I can feel a hesitation of power and the live data reads mulitple misfire but then clears it self but no code or engine light comes it just continues to count and clear its self. I checked for a vacume leak found none, checked to see is the valve cover to intake box hose was cracked or loose and it wasn't. I replaced the # 3 coil, but still no change. There is no crankshaft sensor code nor camshaft sensor code, starts fine and runs fine but when I run live data I can see the misfires occuring. Anybody have any ideas on what is going on or lead me to possible cause?

JJ
Reply With Quote
 


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 09:49 AM.


Powered by vBulletin Version 3.0.7
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.