Notices
86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS
Sponsored by:
Sponsored by: DashLynx

Stumbling/Hesitation during acceleration

Thread Tools
 
Search this Thread
 
Old 01-26-2007, 12:58 PM
  #1  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
Exclamation Stumbling/Hesitation during acceleration

I just cant figure it out. Cant find an air leak, I have good compression, good plug, good wire, new K&N filter...whats the deal. It happened very suddenly, from perfect to crap in one second. And it dies at idle, even if im going 65, if I let off the gas and put in neutral it dies.
Old 01-26-2007, 01:59 PM
  #2  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
what else would cause this??
Old 01-26-2007, 02:16 PM
  #3  
Contributing Member
 
Elvota's Avatar
 
Join Date: Jun 2005
Location: Phx, AZ
Posts: 3,415
Likes: 0
Received 9 Likes on 8 Posts
Take a real close look at the air intake, the bellows can crack deep inside and be hard to see at first. Maybe even remove the section of plastic intake and look underneath, all around. Flex the tube to open gaps.
Old 01-26-2007, 02:19 PM
  #4  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
Thanks, Ill just keep checking for a leak. Are there any leaks that would be harder to see? Also, Where is the long hose at the bottom of the charcoal canister supposed to go.
Old 01-26-2007, 05:15 PM
  #5  
Contributing Member
 
Elton's Avatar
 
Join Date: Jul 2005
Location: Siletz,Oregon
Posts: 12,261
Likes: 0
Received 6 Likes on 5 Posts
check the o2 sensor make sure the connector is tight
Old 01-26-2007, 05:41 PM
  #6  
Registered User
 
95_4MuddinSr5's Avatar
 
Join Date: Aug 2006
Location: Deland
Posts: 96
Likes: 0
Received 0 Likes on 0 Posts
I took mine to the dealership and they said i had the wrong plugs(they were autozones), the air intake hose cracked in the bellows, my fuel pressure regulator was bad, my lower metal intake plenum was cracked, and my injectors installed incorrectly. Spend a bit to go through the list but bound to find the reason.
Old 01-26-2007, 05:48 PM
  #7  
Contributing Member
 
rdharper's Avatar
 
Join Date: May 2006
Location: Morgan Hill, Ca
Posts: 1,066
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by 95_4MuddinSr5
and my injectors installed incorrectly.
Any idea what that means? Seems to me that anything but a correct installation of the fuel injectors would mean a no-run situation.
Old 01-26-2007, 09:11 PM
  #8  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
I'll check the o2 sensor tomorrow. This problem is just throwing me in circles. Im actually starting to think that it is just a clogged injector, but then I dont think that would cause it to die at idle. Somebody out there has to know. What else can I check?
Old 01-27-2007, 05:24 AM
  #9  
Registered User
 
fthertime666's Avatar
 
Join Date: Oct 2006
Location: the fire center, lawton ok
Posts: 215
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Lifelongtoy
Thanks, Ill just keep checking for a leak. Are there any leaks that would be harder to see? Also, Where is the long hose at the bottom of the charcoal canister supposed to go.
long hose is supposed to be routed into the frame. But it basically does nothing not attached to anything
Old 01-27-2007, 07:31 AM
  #10  
Registered User
 
keithguts's Avatar
 
Join Date: Aug 2006
Location: Bay Shore, NY
Posts: 1,424
Likes: 0
Received 1 Like on 1 Post
Get a can of starting fluid spray and spray around all your air tubes, if there is a leak, you will see a difference when the spray hits the leak. I found one this way in my rig. Never would of found it without doing this.
Old 01-27-2007, 07:34 AM
  #11  
Registered User
 
4runnerx3's Avatar
 
Join Date: Jul 2006
Location: North Carolina
Posts: 922
Likes: 0
Received 6 Likes on 4 Posts
Have you replaced the distributor cap?, it could have a crack in it some where.
Old 01-27-2007, 11:27 PM
  #12  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
Brilliant, I didnt think of spraying starter fluid on the hoses. It will just rev higher if the leak sucks it in right? Can I use a can of Ether?

Distributer is new.
Old 01-27-2007, 11:57 PM
  #13  
Contributing Member
 
Elton's Avatar
 
Join Date: Jul 2005
Location: Siletz,Oregon
Posts: 12,261
Likes: 0
Received 6 Likes on 5 Posts
i would stick with carb cleaner and yes it will rev up a little if there a leak
Old 01-28-2007, 01:39 PM
  #14  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
Does it matter that I don't have carb? Aside from a vacuum leak, what would cause the engine to die at idle AND stumble and hesitate during acceleration?
Old 01-28-2007, 01:51 PM
  #15  
Registered User
 
Snake's Avatar
 
Join Date: Jan 2007
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Just an idea.....there is a "idle solenoid" on the carburetor, if it's not working, the engine will not idle.....it's located on the upper part of the carb, toward the firewall and has 2 wires, check it, it could be the problem.
Old 01-28-2007, 02:11 PM
  #16  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
No Im fuel injected
Old 01-28-2007, 02:22 PM
  #17  
Contributing Member
 
em3e3's Avatar
 
Join Date: Dec 2006
Location: Central Coast, CA
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
I had two clogged injectors, and the engine would run, idle, accelerate, but I would act like it was missing. I've had the O2 sensor go out, but it turns on the check engine light. So it's probably *not* the injectors or O2 sensor. Test the vacuum and fuel pressure, check the computer for any codes. Maybe it's as simple as the throttlebody clogged with gunk?
Old 01-28-2007, 02:45 PM
  #18  
Registered User
 
MudHippy's Avatar
 
Join Date: Jan 2007
Posts: 6,106
Likes: 0
Received 23 Likes on 20 Posts
Thottle body idle speed regulator airway restricted/obstructed, use the SEAFOAM, do a search on this site, very usefull stuff. If that don't work, probably EGR stuck open. Would let hot exhaust air in mix at idle, not good, cause your problem.

Last edited by MudHippy; 01-28-2007 at 03:15 PM.
Old 01-28-2007, 05:48 PM
  #19  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
Don't know if this helps, but I'm getting a clicking sound coming from the ECU right before the engine dies. And sometimes it will click without the engine dying. Any thoughts on that?
Old 01-29-2007, 10:15 AM
  #20  
Registered User
Thread Starter
 
Lifelongtoy's Avatar
 
Join Date: Jan 2007
Location: In my drivers seat
Posts: 253
Likes: 0
Received 0 Likes on 0 Posts
Help! this is killing me.


Quick Reply: Stumbling/Hesitation during acceleration



All times are GMT -8. The time now is 04:35 AM.