My blazer jerks

[KWOOD41]

It seems to do good going thru gears but when goes in to overdrive and is picking up speed it jerks on me i can floor it and does fine but when going up hill in od it jerks. this does not happen all the time not until a few days ago.

also when starts up smokes alot then subsides then if sits still for a few starts smoking and after take off smokes alot for a about a mile

any help and cost to repair is appreciated

thanks Keith Wood

92 s-10 chevy blazer 4wd with fuel injection

[s10blazerman4x4]

sounds like my 91 if u gun it it will like lurch back likes it gonna take off then u hear the engine kickin then u take off for the smoke i dont know i get that alot even in the summer whens it 90 out

[Mikado14]

Originally Posted by KWOOD41

It seems to do good going thru gears but when goes in to overdrive and is picking up speed it jerks on me i can floor it and does fine but when going up hill in od it jerks. this does not happen all the time not until a few days ago.

also when starts up smokes alot then subsides then if sits still for a few starts smoking and after take off smokes alot for a about a mile

any help and cost to repair is appreciated

thanks Keith Wood

92 s-10 chevy blazer 4wd with fuel injection

When was the last time you did a complete tune-up? Aslo, the fuel pressure should be checked and, I'm assuming here that it is a 4.3L, the CPI unit should be checked for washing. The smoke you have on start up is more than likely the valve seals.