help just rebuilt motor now problems

co15say · 09-29-2009, 04:59 PM

i just rebuilt my vortec motor in my 98 z71 and now the scanner is calling fo a miss fire. its running real bad any info or idea would be great

leolkfrm · 09-29-2009, 05:08 PM

did you do a compression check to confirm proper valve lash? did you set the timing with a scan tool?

mudseeker · 09-29-2009, 06:14 PM

pretty sure 98 requires a crank relearn via a scantool.

pull the codes.

Crmzendrgone · 09-29-2009, 06:16 PM

Quote:

Originally Posted by mudseeker

pretty sure 98 requires a crank relearn via a scantool.

pull the codes.

I was just going to say that.

gmctrucks · 09-29-2009, 08:34 PM

Also make sure all the sensors are on the correct place and connected.

09-29-2009, 04:59 PM	#1
co15say Junior Member Join Date: Sep 2009 Posts: 9	help just rebuilt motor now problems i just rebuilt my vortec motor in my 98 z71 and now the scanner is calling fo a miss fire. its running real bad any info or idea would be great

09-29-2009, 05:08 PM	#2
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	did you do a compression check to confirm proper valve lash? did you set the timing with a scan tool? __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

09-29-2009, 06:14 PM	#3
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	pretty sure 98 requires a crank relearn via a scantool. pull the codes. __________________ i'd rather be hunting

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09-29-2009, 08:34 PM	#5
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,033	Also make sure all the sensors are on the correct place and connected.