Very Rough Idle / Basically No Runability
#1
Registered User
Thread Starter
Join Date: Apr 2007
Location: Vancouver, WA
Posts: 80
Likes: 0
Received 0 Likes
on
0 Posts
Very Rough Idle / Basically No Runability
Very Rough Idle/Missing - Basically No Runability
this has been a very long battle so ill try to summarize this as well and
as short as i can first off the problem
i bought this 95 runner (v6 automatic) my 5th one....guy couldnt get it
started (no spark) he tried some things and gave up and i bought
it.....tested alot of things....ended up findin that the motor had
overheated ALOT and the egr hose had broke and burned the engine harness
(melting the distrib wires alot with others all together and therefore had
no spark)
fixed the harness and when the fire up the motor.....ran like hell
did compression check had 180 psi in 2 cyls...and 0 in all others....
pulled heads....found ALOT of burnt valves.....got a new set of heads off
a 90 3vze motor
put it all back together now have 175 psi to 180 psi in all cylinders
yet still runs like hell....starts but when it idles its very very rough
almost like its out of time...and when you throttle up it more or less
gets worse and black smoke comes out exhaust and the pinging begins....
its sounds like a fuel or timing issue but i am pretty sure i have covered
everything....it might be somethin im missin so i hope this post will give
me some new motivation....
here is the list of things that have been tested or replaced
valve clearance
head gaskets
all upper end gaskets
fuel filter
fuel pressure regulator
injectors
distrib (cap and rotor)
coil
ignitor
ecu
tps
maf
plugs and wires
vacuum lines
i have check timing a dozen times and to be honest im sick of takin it
apart. haha....i know the timing marks are 100% on....
i guess the only thing im not too sure on....is if there is any difference
in the 95 3vze to the 90 3vze motor....i compared cams and all and they
look the same....i know the obd1 motor will have more sensors like the egr
sensor and what not....but mechanically is there a difference...maybe like
the distributor teeth on the cam are different or somethin so my distrib
isnt firing right....i dont really know where to go from here....im a lil
at a loss....i am pretty damn good with vehicles and my neigher is a
diesel mechanic and my roomate is a nissan mechanic and we are all
stumped....
any ideas??
this has been a very long battle so ill try to summarize this as well and
as short as i can first off the problem
i bought this 95 runner (v6 automatic) my 5th one....guy couldnt get it
started (no spark) he tried some things and gave up and i bought
it.....tested alot of things....ended up findin that the motor had
overheated ALOT and the egr hose had broke and burned the engine harness
(melting the distrib wires alot with others all together and therefore had
no spark)
fixed the harness and when the fire up the motor.....ran like hell
did compression check had 180 psi in 2 cyls...and 0 in all others....
pulled heads....found ALOT of burnt valves.....got a new set of heads off
a 90 3vze motor
put it all back together now have 175 psi to 180 psi in all cylinders
yet still runs like hell....starts but when it idles its very very rough
almost like its out of time...and when you throttle up it more or less
gets worse and black smoke comes out exhaust and the pinging begins....
its sounds like a fuel or timing issue but i am pretty sure i have covered
everything....it might be somethin im missin so i hope this post will give
me some new motivation....
here is the list of things that have been tested or replaced
valve clearance
head gaskets
all upper end gaskets
fuel filter
fuel pressure regulator
injectors
distrib (cap and rotor)
coil
ignitor
ecu
tps
maf
plugs and wires
vacuum lines
i have check timing a dozen times and to be honest im sick of takin it
apart. haha....i know the timing marks are 100% on....
i guess the only thing im not too sure on....is if there is any difference
in the 95 3vze to the 90 3vze motor....i compared cams and all and they
look the same....i know the obd1 motor will have more sensors like the egr
sensor and what not....but mechanically is there a difference...maybe like
the distributor teeth on the cam are different or somethin so my distrib
isnt firing right....i dont really know where to go from here....im a lil
at a loss....i am pretty damn good with vehicles and my neigher is a
diesel mechanic and my roomate is a nissan mechanic and we are all
stumped....
any ideas??
Thread
Thread Starter
Forum
Replies
Last Post
montanatruck
86-95 Trucks & 4Runners
15
02-26-2017 07:07 AM