Blazer Forum - Chevy Blazer Forums

Engine & Transmission Post your Engine and Transmission related problems here.

miss fire at 50mph

Thread Tools
 
Search this Thread
 
Old Apr 27, 2010 | 09:45 PM
Share
  #1  
jeffkoski's Avatar
Thread Starter
|
New Member
Joined: Apr 2010
Posts: 5
jeffkoski is on a distinguished road
Default miss fire at 50mph
2001 blazer stumbles between 50 to 55 mph no other time plugs are new cap new but it pulls up codes on crank and cam sensors why would they just miss fire at those speeds
 
Old Apr 28, 2010 | 06:21 AM
Share
  #2  
swartlkk's Avatar
Administrator
Joined: May 2005
Posts: 41,329
From: Waterloo, NY
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default
Intermittent conditions can be caused by faulty wiring, loose components, etc.

But lets start with the specific codes. Your PCM is trying to tell you what's wrong.
 
Old Apr 29, 2010 | 09:36 PM
Share
  #3  
jeffkoski's Avatar
Thread Starter
|
New Member
Joined: Apr 2010
Posts: 5
jeffkoski is on a distinguished road
Default
Question cam sensor can be replaced by rookie but the crank needs to be replaced at shop right? replaced plugs thet were gapped at 75 and the one behind steering shaftwas real black
 
Last edited by jeffkoski; Apr 29, 2010 at 09:39 PM. Reason: more info
Old Apr 30, 2010 | 06:26 AM
Share
  #4  
swartlkk's Avatar
Administrator
Joined: May 2005
Posts: 41,329
From: Waterloo, NY
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default
Either may require a CASE relearn (aka. crankshaft variation learn procedure) to properly calibrate the PCM to the variation of the new sensors. Either can physically be replaced in your driveway.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Wire on fire/almost a major electrical fire
tall_ish
Lighting & Electrical
0
Nov 20, 2010 09:05 PM
miss fire in cylinder 5
iloveblazers
2nd Generation S-series (1995-2005) Tech
10
Aug 13, 2010 09:33 PM
check engine light comes to multiple miss fire tried a few things didnt fix it???
scott_wheels
2nd Generation S-series (1995-2005) Tech
4
Jan 26, 2010 05:49 PM
PLEASE HELP!!muti. miss fire
Tblazer99
2nd Generation S-series (1995-2005) Tech
3
Nov 5, 2007 01:12 PM
Fuel and #1 Miss Fire Troubleshooting
grdylan
2nd Generation S-series (1995-2005) Tech
2
Jun 5, 2007 05:27 PM
Tags
Back to Subforum
Engine & Transmission
View Next Unread
700r4 band adj??? is this ok?




Advanced Search

All times are GMT -5. The time now is 12:50 AM.