LSC15's 95 Tacoma 4x4

Go Back   Tacoma World Forums > Tacoma Discussion > 1st Gen. Tacomas

Notices

HELP!!! bad bucking and jerking

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-21-2013, 12:20 PM   #1
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
HELP!!! bad bucking and jerking

First, 02 Taco 4x4 3.4l: I was driving in second gear yesterday coming off a stop and went wot to pass someone. Next thing I know the check engine light is flashing at me, and the vehicle is violently bucking... Since yesterday, I have changed all 3 coils, plugs, wires, fuel filter, pcv, and maf... No change and all are oe componets. The vehicle starts and idles fine. It only misfires under load( climbing a hill or in first gear), or wot. It will only misfire after 2300rpm. Please help this is my dd... I am lost.
  Reply With Quote
Old 04-21-2013, 12:21 PM   #2
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
oh ya and no stored or present codes...
  Reply With Quote
Old 04-21-2013, 12:43 PM   #3
Emergency Avatar
Aught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shed
 
Aught2TaCO's Avatar
Name: Troy
Joined: Oct 2012, #89813
Location: Wheat Ridge, Colorada
Age: 47
Gender: Male
Posts: 178
Aught2TaCO's Tacoma Gallery
Has the timing belt been changed? Don't know if it is that, I'm just throwing it out there.
  Reply With Quote
Old 04-21-2013, 12:46 PM   #4
Senior Member
2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed2000GTacoma is one of the sharper tools in the shed
 
2000GTacoma's Avatar
Joined: Jan 2011, #50183
Location: Snow Hill NC
Gender: Male
Posts: 1,928
2000GTacoma's Tacoma Gallery
Quote:
Originally Posted by Aught2TaCO View Post
Has the timing belt been changed? Don't know if it is that, I'm just throwing it out there.
don't think the timing belt would cause this. If it jumped time it would run bad at idle...maybe a fuel delivery issue or spark issue.
  Reply With Quote
Old 04-21-2013, 12:52 PM   #5
Emergency Avatar
Aught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shed
 
Aught2TaCO's Avatar
Name: Troy
Joined: Oct 2012, #89813
Location: Wheat Ridge, Colorada
Age: 47
Gender: Male
Posts: 178
Aught2TaCO's Tacoma Gallery
Quote:
Originally Posted by 2000GTacoma View Post
don't think the timing belt would cause this. If it jumped time it would run bad at idle...maybe a fuel delivery issue or spark issue.
Just thought of that after I hit enter lol. I was thinking of valve float at high RPM, but that happens primarily with pushrod engines that I'm more familiar with.
  Reply With Quote
Old 04-21-2013, 12:55 PM   #6
Senior Member
newertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shednewertoy is one of the sharper tools in the shed
 
newertoy's Avatar
Coast Guard: electronics tech
Name: Kevin
Joined: Feb 2010, #32204
Location: East Tn
Gender: Male
Posts: 1,114
newertoy's Tacoma Gallery
HMMM !
  Reply With Quote
Old 04-21-2013, 01:03 PM   #7
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
The timing belt was replaced 2000 miles ago. The truck only has 91k. Just removed the timing cover and it hasn't jumped time... It feels like it hits a wall when it misses... Just removed both cam and crank sensors, no cracks in them...
  Reply With Quote
Old 04-21-2013, 01:04 PM   #8
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
Quote:
Originally Posted by Aught2TaCO View Post
Just thought of that after I hit enter lol. I was thinking of valve float at high RPM, but that happens primarily with pushrod engines that I'm more familiar with.
I would say valve float, but this is happening around 2500rpm and up...
  Reply With Quote
Old 04-21-2013, 01:08 PM   #9
Member
camt10 is on a distinguished road
Joined: Dec 2007, #3706
Posts: 60
camt10's Tacoma Gallery
Lights flashing indicating catalyst poss damage usually indicating lean mixture if you have access to a fuel gage attach and monitor under load see what psi is doing. That's a start also if u have access to a cheapo scan tool see what fuel trim and oxygen sensor readings r
  Reply With Quote
Old 04-21-2013, 01:13 PM   #10
Emergency Avatar
Aught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shedAught2TaCO is one of the sharper tools in the shed
 
Aught2TaCO's Avatar
Name: Troy
Joined: Oct 2012, #89813
Location: Wheat Ridge, Colorada
Age: 47
Gender: Male
Posts: 178
Aught2TaCO's Tacoma Gallery
Quote:
Originally Posted by camt10 View Post
Lights flashing indicating catalyst poss damage usually indicating lean mixture if you have access to a fuel gage attach and monitor under load see what psi is doing. That's a start also if u have access to a cheapo scan tool see what fuel trim and oxygen sensor readings r
I was pondering fuel pressure too.
  Reply With Quote
Old 04-21-2013, 03:11 PM   #11
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
Update, p1135 o2 code just popped up... Going to Advance to pick up a denso sensor. Thanks to any and all who have helped so far. What is fuel pressure supposed to be? I did not see any test ports on the fuel rail?
  Reply With Quote
Old 04-21-2013, 03:45 PM   #12
Member
camt10 is on a distinguished road
Joined: Dec 2007, #3706
Posts: 60
camt10's Tacoma Gallery
Did u test the sensor output,ie resistance check could be bad if its original which sensor is that can't remember is that pre cat or post.fuel psi if I remember is around 40 either way should be constant what u would be looking for if it was an issue is drastic decrease when engine exhibits mis.no fuel Schrader u have to tee in to fuel line.who knows you might get lucky with o2 sensor if u need specific info I can get it at work tommorrow.
  Reply With Quote
Old 04-21-2013, 04:24 PM   #13
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
Quote:
Originally Posted by camt10 View Post
Did u test the sensor output,ie resistance check could be bad if its original which sensor is that can't remember is that pre cat or post.fuel psi if I remember is around 40 either way should be constant what u would be looking for if it was an issue is drastic decrease when engine exhibits mis.no fuel Schrader u have to tee in to fuel line.who knows you might get lucky with o2 sensor if u need specific info I can get it at work tommorrow.
Short term is 0% lt is 10.2%... My upstream sensor 1 o2 is showing 0v at idle. When throttle is pressed it hits .72v. I'm gonna start there and hope this works...
  Reply With Quote
Old 04-21-2013, 04:35 PM   #14
Member
camt10 is on a distinguished road
Joined: Dec 2007, #3706
Posts: 60
camt10's Tacoma Gallery
At 2k rpm does the sensor cycle or stay constant o2s should cycle
  Reply With Quote
Old 04-21-2013, 05:06 PM   #15
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
Quote:
Originally Posted by camt10 View Post
At 2k rpm does the sensor cycle or stay constant o2s should cycle
cycles .2-.4v
  Reply With Quote
Old 04-21-2013, 05:31 PM   #16
Member
camt10 is on a distinguished road
Joined: Dec 2007, #3706
Posts: 60
camt10's Tacoma Gallery
Check that the sensor has its full range ie lean mixture out see out put
Richer check output
  Reply With Quote
Old 04-21-2013, 06:24 PM   #17
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
Well trying to remove the sensor the stud to the converter broke, cross threaded... Whomever owned this taco before me did a number. Found an exhaust leak near the sensor, and it's a Bosch 02... The factory converter looked to be running pretty hot, gonna change it.
  Reply With Quote
Old 04-21-2013, 06:47 PM   #18
Member
camt10 is on a distinguished road
Joined: Dec 2007, #3706
Posts: 60
camt10's Tacoma Gallery
Is the element in cat melted? They do run pretty hot,also what stud,mounting stud for 02?
  Reply With Quote
Old 04-21-2013, 07:08 PM   #19
tacocass [OP] tacocass is offline
Member
tacocass is on a distinguished road
 
tacocass's Avatar
Name: cass
Joined: Mar 2013, #99133
Location: okie-homa
Gender: Male
Posts: 32
tacocass's Tacoma Gallery
Quote:
Originally Posted by camt10 View Post
Is the element in cat melted? They do run pretty hot,also what stud,mounting stud for 02?

ya stud for the dang o2... The cat was almost glowing red, and caked with red clay! I've been scraping clay off of this thing since I bought it. I don't know if the element is melted, but I dont see how else to replace the stud...
  Reply With Quote
Old 04-21-2013, 07:12 PM   #20
Member
camt10 is on a distinguished road
Joined: Dec 2007, #3706
Posts: 60
camt10's Tacoma Gallery
Is the stud flush or some sticking up
  Reply With Quote
Reply

Products Discussed in this Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Jerking? bsb120 1st Gen. Tacomas 6 03-13-2013 07:53 PM
Help with 4x4 bucking sicripp83 2nd Gen. Tacomas 23 03-06-2011 12:13 AM
Jerking vtman 908 Technical Chat 4 07-25-2010 07:17 PM
Jerking Tacoma bambooshoots 2nd Gen. Tacomas 3 06-23-2010 05:32 PM
Bucking up the Rear suspension Caduceus Suspension 11 06-15-2010 11:52 AM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.