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No Throttle Response Randomly

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Old 04-16-2013, 07:39 PM   #1
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No Throttle Response Randomly

So for a while now, its completely random. Driving down the freeway etc my truck loses all throttle response, the engine doesnt die, but it just doesnt do anything. I have to pull over and turn the truck off and re start. It happens seldomly but is very frustrating when it happens. It will happen 4-6 times then be fine for 5 months. Never throws a code or anything. I thought it was the URD MAF calibrator i had, but it has happened since removing it. ANy input would be greatly appreciated.

Intake is clean
I have cleaned the MAF

Engine Mods
Afe stage3 si Intake
DTLT Headers
Stock Muffler
Just changed spark plugs

I'm thinking Fuel Filter/Pump?
02 sensors?
Vaccum lines?


11-5-2013
Update, engine is now Stock and still happening. Have a P0430 and also an 02 sensor code, truck is going to dealer Friday for a full Diagnostics test.
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Old 04-16-2013, 07:59 PM   #2
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I'd call URD Tech Support. Gadget will be able to be able help you.

No codes pop up from this? Lights? Nothing?
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Old 04-16-2013, 07:59 PM   #3
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Did you have the recall performed at the dealership.. the one that reflashes the PCM and recalibrates the throttle ?
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Old 04-16-2013, 07:59 PM   #4
nofords08 [OP] nofords08 is offline
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I've been trying to reach Gadget for months now.

Nope no codes, It happened 6 times to Cliff on Saturday
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Old 04-16-2013, 07:59 PM   #5
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Do you have the traction control system in your '08?
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Old 04-16-2013, 08:00 PM   #6
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Quote:
Originally Posted by MonkeyProof View Post
Did you have the recall performed at the dealership.. the one that reflashes the PCM and recalibrates the throttle ?
Was not aware of one?
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Old 04-16-2013, 08:00 PM   #7
nofords08 [OP] nofords08 is offline
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Quote:
Originally Posted by BradyT88 View Post
Do you have the traction control system in your '08?
Nope
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Old 04-16-2013, 08:03 PM   #8
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Quote:
Originally Posted by nofords08 View Post
Nope
Well there goes my theory. haha. The only other thing I can think of now is a faulty ECU or a loose wire some where.
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Old 04-16-2013, 08:05 PM   #9
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Quote:
Originally Posted by BradyT88 View Post
Well there goes my theory. haha. The only other thing I can think of now is a faulty ECU or a loose wire some where.
I will go check where i removed the Urd MAf Calibrator and make sure everything is properly capped etc but i doubt it has anything to do with that
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Old 04-16-2013, 08:09 PM   #11
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Quote:
Originally Posted by GREEKBOY12295 View Post
Didint ur ECU get fried at Toyota once and they replaced it?
Nope?
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Old 04-16-2013, 08:10 PM   #12
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Quote:
Originally Posted by nofords08 View Post
Nope?
What happened that one time at toyota when they gave you that rental?
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Old 04-16-2013, 08:11 PM   #13
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Quote:
Originally Posted by GREEKBOY12295 View Post
What happened that one time at toyota when they gave you that rental?
When they plugged my truck into the Scan Tool it froze the scanner and they had to wait to reset there system or something lol
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Old 04-16-2013, 08:13 PM   #14
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Since its electronic throttle I would look for loose connections that are part of the system. Maybe a reflash could help too.

GL
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Old 04-16-2013, 08:13 PM   #15
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Quote:
Originally Posted by nofords08 View Post
I will go check where i removed the Urd MAf Calibrator and make sure everything is properly capped etc but i doubt it has anything to do with that
I haven't installed one so I don't know what all signals they affect.
Quote:
Originally Posted by nofords08 View Post
When they plugged my truck into the Scan Tool it froze the scanner and they had to wait to reset there system or something lol
That sounds sketchy...


I wonder if one of your throttle position sensors might be going bad. I imagine that is unlikely but there are two of them and if they don't match it sends no signal to the throttle body.
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Old 04-16-2013, 08:15 PM   #16
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singlecabguy (?) had this problem a while back, i think.
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Old 04-16-2013, 08:15 PM   #17
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Quote:
Originally Posted by BradyT88 View Post
I haven't installed one so I don't know what all signals they affect.


That sounds sketchy...


I wonder if one of your throttle position sensors might be going bad. I imagine that is unlikely but there are two of them and if they don't match it sends no signal to the throttle body.
Throttle Position sensors... ill add that to my list thanks!
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Old 04-16-2013, 09:12 PM   #18
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Quote:
Originally Posted by nofords08 View Post
Was not aware of one?
The floor mat recall.
More than 25% throttle, tap the brakes, and the engine dumps to idle.

If your brake light switch is chattering, it'll randomly kill power.
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Old 04-16-2013, 09:14 PM   #19
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Quote:
Originally Posted by Rich91710 View Post
The floor mat recall.
More than 25% throttle, tap the brakes, and the engine dumps to idle.

If your brake light switch is chattering, it'll randomly kill power.
So the reflash makes that not happen?
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Old 04-16-2013, 09:18 PM   #20
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Quote:
Originally Posted by nofords08 View Post
So the reflash makes that not happen?
i don't think so, if you've had the pedal chop done the ECU will cut power when it senses a certian % of throttle while the brakes are pressed.
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