Herkin and Jerkin between 40 and 50 mph

Tarponwilly · 06-22-2006, 07:32 AM

Hi all,
I have a 95' Blazer LS. About 4 months ago, I had the whole thing tuned up by a transmission place, not a chevy dealership. Now everytime I get to 40 mph and up to 50 mph, my blazer "lurches" or jerks. Am I mis-firing? Bad wires? Soot build up? I'm not a do it yourself engine guy so any help would be greatly appreciated.
Thanks

Shrike505 · 06-24-2006, 11:22 AM

Quote: Originally Posted by Tarponwilly

Hi all,
I have a 95' Blazer LS. About 4 months ago, I had the whole thing tuned up by a transmission place, not a chevy dealership. Now everytime I get to 40 mph and up to 50 mph, my blazer "lurches" or jerks. Am I mis-firing? Bad wires? Soot build up? I'm not a do it yourself engine guy so any help would be greatly appreciated.
Thanks

Check the Coil Wire for Burn through i Put a cheap set on my 96 before an a few days later i had the same problem an then it wouldnt run at all ..also as a side note check an clean the Mass air sensor\Air charge sensor

doc_rage · 06-26-2006, 01:06 PM

Do you mean that the rpms shoot up with no acceleration (like it's jumping in and out of OD) or that it has a definite miss. If it's the former, then think about getting the transmission flushed. Cured my issues between 45-55mph

Tarponwilly · 06-30-2006, 07:34 AM

Quote: Originally Posted by doc_rage

Do you mean that the rpms shoot up with no acceleration (like it's jumping in and out of OD) or that it has a definite miss. If it's the former, then think about getting the transmission flushed. Cured my issues between 45-55mph

No rpm shoot up, blazer just jerks. It does do the rpm shoot up and no acceleration when I put it in reverse though.

06-22-2006, 07:32 AM	#1
Tarponwilly Registered User Join Date: Jun 2006 Posts: 2 Location: User is: OffLine	Herkin and Jerkin between 40 and 50 mph Hi all, I have a 95' Blazer LS. About 4 months ago, I had the whole thing tuned up by a transmission place, not a chevy dealership. Now everytime I get to 40 mph and up to 50 mph, my blazer "lurches" or jerks. Am I mis-firing? Bad wires? Soot build up? I'm not a do it yourself engine guy so any help would be greatly appreciated. Thanks
	[Reply w/Quote]

06-24-2006, 11:22 AM	#2
Shrike505 Rabid-Viper06 Age: 35 Join Date: Dec 2005 Posts: 12 Location: Concord,North carolina User is: OffLine	Re: Herkin and Jerkin between 40 and 50 mph Quote: Originally Posted by Tarponwilly Hi all, I have a 95' Blazer LS. About 4 months ago, I had the whole thing tuned up by a transmission place, not a chevy dealership. Now everytime I get to 40 mph and up to 50 mph, my blazer "lurches" or jerks. Am I mis-firing? Bad wires? Soot build up? I'm not a do it yourself engine guy so any help would be greatly appreciated. Thanks Check the Coil Wire for Burn through i Put a cheap set on my 96 before an a few days later i had the same problem an then it wouldnt run at all ..also as a side note check an clean the Mass air sensor\Air charge sensor
	[Reply w/Quote]

06-26-2006, 01:06 PM	#3
doc_rage What's in a name?.... Join Date: Nov 2003 Posts: 305 Location: MD User is: OffLine	Re: Herkin and Jerkin between 40 and 50 mph Do you mean that the rpms shoot up with no acceleration (like it's jumping in and out of OD) or that it has a definite miss. If it's the former, then think about getting the transmission flushed. Cured my issues between 45-55mph
	[Reply w/Quote]

06-30-2006, 07:34 AM	#4
Tarponwilly Registered User Join Date: Jun 2006 Posts: 2 Location: User is: OffLine	Re: Herkin and Jerkin between 40 and 50 mph Quote: Originally Posted by doc_rage Do you mean that the rpms shoot up with no acceleration (like it's jumping in and out of OD) or that it has a definite miss. If it's the former, then think about getting the transmission flushed. Cured my issues between 45-55mph No rpm shoot up, blazer just jerks. It does do the rpm shoot up and no acceleration when I put it in reverse though.
	[Reply w/Quote]