Topic: motor sputter

[ROLIE POLIE]

 
 i have a 1987 toyota 4 runner with a slightly modified 22re
(bored, cam ,k&n air filter(air box style) header, muffler)
the problem im having is it hesitates(right in my cruse range) between 2,000 & 3000 rpm, but once it reaches around 3100 rpm it jumps right out of it and runs like a top above 3000,  i drive down a moderatly steep hill every day and once i get to the bottom it sputters in that same rpm range in 1st and 2nd gear, then after playing with the skinny peddel a little it pops right out
the truck revs up jus fine out of gear, it smells a little lean. ive tried testing the following parts, : coil/igniter,afm, and im gunna try a different distributer today, it dose have a header leak right above the o2 sensor might that have anything to do with it?         any info could help
                                            

[BobJ]

Curious what lean smells like? Have you tried richening the air metering valve settings at all?

[Knute]

 if there is a rip in your intake boot, that will do it even if its really small

it happened to me, and it was just a little 1inch rip in the boot.

[emsvitil]

O2 sensor

[NATER623]

you may have a funky TPS with a bad spot or a funky AFM with a bad spot or the door is not moving freely.     Like Knute said, take a good look at the intake tube and rubbers.  The curved one at the throttle body cracks down between the pleats.  Mine has a crack, I put a RTV silicon band-aid on it till I find a good one.


EDIT: sorry to drag an ancient thread to the top