3vze idle issues
#1
3vze idle issues
Hey guys
Have a 1990 4runner with the 3vze and have issues with the idle.
It seems to struggle to keep the revs up often after stopping at traffic lights, or when turning with the wheel at full lock.
It also has a bit of a stutter at around 2000rpm in 4th gear, is quite jerky.
Replaced so far:
Dizzy cap and rotor
Plugs
Leads
2 x Solenoids under inlet manifold on right side of vehicle(they were missing when i bought the truck)
Other things ive checked:
Throttle body removed, cleaned and replaced
Idle screw changed but does nothing
Vacuum lines checked (1 is open not sure why or what its for)
I was talking to my auto electrician today when i got my AC regassed, and he says there is a sucking sound coming from the EGR thingy on the right hand side of the engine which shouldnt be there.
This is it:
There are some holes in the bottom of it that are constantly sucking in fresh air and its quite loud.
Had someone else mention that it might be only running on 5 cylinders?
Anyone have any idea on what mite be causing my screwed up idle?
Cheers
Have a 1990 4runner with the 3vze and have issues with the idle.
It seems to struggle to keep the revs up often after stopping at traffic lights, or when turning with the wheel at full lock.
It also has a bit of a stutter at around 2000rpm in 4th gear, is quite jerky.
Replaced so far:
Dizzy cap and rotor
Plugs
Leads
2 x Solenoids under inlet manifold on right side of vehicle(they were missing when i bought the truck)
Other things ive checked:
Throttle body removed, cleaned and replaced
Idle screw changed but does nothing
Vacuum lines checked (1 is open not sure why or what its for)
I was talking to my auto electrician today when i got my AC regassed, and he says there is a sucking sound coming from the EGR thingy on the right hand side of the engine which shouldnt be there.
This is it:
There are some holes in the bottom of it that are constantly sucking in fresh air and its quite loud.
Had someone else mention that it might be only running on 5 cylinders?
Anyone have any idea on what mite be causing my screwed up idle?
Cheers
#2
Registered User
Join Date: Oct 2006
Location: Madison, AL
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
I think you are missing the EGR Temp Sensor! Is there a small 4 wire harness with a grey plug on it that is laying on the right fender well area somewhere? The temp sensor threads into that little hole where the sucking noise is.
#3
Registered User
Early non-California 3vz's did not have a temp sensor but the EGR still had the threaded hole. The hole doesn't go all the way through though and won't cause a vacuum leak. Your description sounds like the diaphragm in the valve has failed, creating a vacuum leak.
Trending Topics
#8
Registered User
Join Date: Dec 2009
Location: Austin, TX
Posts: 268
Likes: 0
Received 0 Likes
on
0 Posts
A vacuum leak test might help you figure out whether that's the cause of your idle problems. Be careful spraying flammable stuff around hot exhaust pipes.
Also what's that crud around the pipe that joins the EGR valve from the left (top in the pic)? Right where it joins the EGR valve? Not some jury-rigged attempt by the last mechanic at fixing something broken? Here's a clean one:
https://www.yotatech.com/forums/f16/...-needed-69984/
Also what's that crud around the pipe that joins the EGR valve from the left (top in the pic)? Right where it joins the EGR valve? Not some jury-rigged attempt by the last mechanic at fixing something broken? Here's a clean one:
https://www.yotatech.com/forums/f16/...-needed-69984/
Last edited by betelnut; 03-04-2010 at 05:21 AM.
#9
well just my 02 cents....the VAFM has a Idle Air Sensor that could be going bad and not sending the correct signals to the ecu, and not even throw a code if it does it intermittently
this could cause rough idle and a hessitation when accelerating or under a load and jerking
just something to check into
this could cause rough idle and a hessitation when accelerating or under a load and jerking
just something to check into
Thread
Thread Starter
Forum
Replies
Last Post
montanatruck
86-95 Trucks & 4Runners
15
02-26-2017 07:07 AM