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97 Tacoma surges at a stop

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Old 05-14-2009, 07:09 AM   #1
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97 Tacoma surges at a stop

I tried posting this on toyotanation.com, but apparently nobody has any idea, or they're too ignorant to say anything. They've never really helped me out, anyways, here's the problem..

So, my 97 Tacoma, w/ the 2.7L in it blew a head gasket back in November. Got that fixed, changed both o2 sensors, checked the cat, its good. Exhaust manifold was cracked so I had to get another.

Now, Somehow when I was taking the intake manifold/throttle body off of the engine before I took the head off to change the head gasket, one of the wires came out of the plug for the IAT sensor. I didn't realize that it was this until I got the whole thing back together and started driving it, had to turn up the idle for it to actually idle, then it idled right. it threw a CEL, but it was drivable, but it wasn't the same. It didn't have the same pep and wanna get up and go. Which was Idle Air Temperature Sensor Malfunction.. so I pulled the throttle body off and saw that the wire was out of the plug.

Anyways, I got the plug fixed and hooked it all up. High idle, I think CRAP. But, then I realized that in order to get the temperature up for the o2 sensors and catalytic converter its gonna idle high for a few mins then go back down, but it was never up to 2k, it always idled at about 1500 or so.

But, now when I come to a stop it surges kinda, then stops. But it does this everytime I stop. Anyone have any ideas?

Sry its so long..
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Old 05-14-2009, 07:15 AM   #2
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
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Welcome to TW!


Im not sure why it would surge on ya like that.....All the vacumme lines are connected propperly?
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Old 05-14-2009, 07:24 AM   #3
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Quote:
Originally Posted by chris4x4 View Post
Welcome to TW!


Im not sure why it would surge on ya like that.....All the vacumme lines are connected propperly?
As far as I know they are. Didn't surge at first when I changed out the head gasket and put it together, started after I fixed that sensor. I know there's an exhaust leak at the donut gasket right off the exhaust manifold, but I'm not sure that would cause it to surge. As it had a cracked exhaust manifold and a few other exhaust leaks before the HG blew.
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Old 05-14-2009, 07:25 AM   #4
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
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Hmmm......Not sure. Fix the exhaust leak, though.....not sure if it would help the surging..........
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Old 05-14-2009, 07:31 AM   #5
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Quote:
Originally Posted by chris4x4 View Post
Hmmm......Not sure. Fix the exhaust leak, though.....not sure if it would help the surging..........

I'm gettin' there. I'm in the process of helping my dad build a lowrider, 2wd 89-95 body style dually pickup. it's gonna be sweet.
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Old 05-14-2009, 08:51 AM   #6
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98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
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WHOA, female wrencher. Sweet!!

Auto or manual?
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Old 05-14-2009, 09:00 AM   #7
With sufficient thrust, pigs fly just fine.
chris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shedchris4x4 is one of the sharper tools in the shed
 
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Quote:
Originally Posted by 98tacoma27 View Post
WHOA, female wrencher. Sweet!!

Auto or manual?
Says manual in her description....
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Old 05-14-2009, 09:04 AM   #8
:POOPCORN:
98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
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Quote:
Originally Posted by chris4x4 View Post
Says manual in her description....
Damn you and your excessive attention to detail.

How are you approaching the stops? In nuetral clutch disengaged or clutch engaged?
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Old 05-14-2009, 10:48 AM   #9
Got the yota feverrrr.
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Yea, it's a 5 spd. depends on the stop. I'm out the country so every stopsign is different. Usually downshift to 3rd then take it outta gear and coast.

I'm for some reason thinkin' it may be a vaccuum leak, might have something to do with the throttle body having to come off to fix that sensor.. I'm not lookin' at the motor right now, but I believe vacuum lines do come from the brakes to the throttlebody..
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Old 05-14-2009, 10:50 AM   #10
:POOPCORN:
98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
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Is there a possibility of a damaged seal?
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Old 05-14-2009, 10:52 AM   #11
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Quote:
Originally Posted by 98tacoma27 View Post
Damn you and your excessive attention to detail.

How are you approaching the stops? In nuetral clutch disengaged or clutch engaged?
I won't drive it unless it's a manual.

here she is.

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Old 05-14-2009, 10:53 AM   #12
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98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
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Oh my god I think I am in love...........
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Old 05-14-2009, 10:53 AM   #13
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Quote:
Originally Posted by 98tacoma27 View Post
Is there a possibility of a damaged seal?

Damaged seal where?
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Old 05-14-2009, 10:56 AM   #14
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98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
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Quote:
Originally Posted by justalilcrazy625 View Post
Damaged seal where?
On the intake manifold/throttle body, where it mounts to the block.

Another possibility would be a damage/worn/dried out hose.

Everything you are discribing seems like an air leak.
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Old 05-14-2009, 10:57 AM   #15
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I know the gasket that goes between the intake manifold and throttle body is new, I got the whole gasket kit when I did the HG. And I just replaced both coolant lines that go from the throttle body to the block, I know that wouldn't have much to do with it, but I'll have to check the hoses over and see if they're dryrotted. She's 12yrs old, so there's a possibility. I just wish she'd start runnin' like she did before the HG blew.
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Old 05-14-2009, 11:00 AM   #16
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98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
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Quote:
Originally Posted by justalilcrazy625 View Post
I know the gasket that goes between the intake manifold and throttle body is new, I got the whole gasket kit when I did the HG. And I just replaced both coolant lines that go from the throttle body to the block, I know that wouldn't have much to do with it, but I'll have to check the hoses over and see if they're dryrotted. She's 12yrs old, so there's a possibility. I just wish she'd start runnin' like she did before the HG blew.
Ain't nothing like a sweet runnin' first gen!!! WHOOP!!!!!!!!
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Old 05-14-2009, 11:02 AM   #17
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My guess with the age of truck, I would start looking at all the vacuum lines...
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Old 05-14-2009, 11:04 AM   #18
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man she's got 235K on her and she runs better than my uncles 06 v6 taco, outdoes it in the mud too. 3rd place in the first bog, made it 42ft. farther than my dad in his lifted toyo pickup w/ detroit lockers.


(I come from a Toyota family. My dad, stepmom, step sister, and me plus my gram and all aunts and uncles drive toyotas... hahah )
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Old 05-14-2009, 11:04 AM   #19
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98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
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Quote:
Originally Posted by justalilcrazy625 View Post
man she's got 235K on her and she runs better than my uncles 06 v6 taco, outdoes it in the mud too.


(I come from a Toyota family. My dad, stepmom, step sister, and me plus my gram and all aunts and uncles drive toyotas... hahah )

Hell, she ain't even broke in yet.
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Old 05-14-2009, 11:06 AM   #20
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When I get this problem fixed she should be good for another 200k if not more.
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