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Rough idle. 70000 miles cleaned throttle body charge batter run good for short time then rough idle again

Check engine lite on but no codes

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It has to have a code stored for the check engine to light up!

try a different obd2 scanner and plug it in

local autozone, advance auto parts, or aamco transmission shops do this for free

good luck!

Posted on Apr 01, 2015

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Posted on Jan 02, 2017

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2000 ford escort 2.0L. plugs, wires, coil pack, alternator, MAF sensor. hard to start and RPM around 1k wants to die (any stops) always runs rough. Says air intake sensor. catalytic converter or CCRM?


Have you cleaned the throttle body and throttle body valve? have you cleaned the idle speed control air bypass valve? are the injectors clean? Are there any fault codes in memory, do the things I mentioned if you haven't already. Also hard engine mounts can cause roughness at idle. Another thing is the timing belt tight?

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When at steady speed then picks up and goes good like it gets a burst of fuel fad runs right but then it will keep doing it


Clean the inside of the throttle body with throttle body cleaner and a clean lint free cloth. Check or have checked the TPS Throttle Position Sensor as it can cause idle and stumble issues.

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Hi, is your air filter clean,any trouble codes,throttle body clean,idle air control passage clear,idle air control module.

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What obd codes are present? Go to autozone for free test.

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A few things ,97;tune up, fuel filter,air filter,clan throttle body,put in tank some fuel injection cleaner good one not cheap.

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I have a 92 Isuzu pickup with a L4 2.3L. that recently started idling rough and idles up and down when stopped. It has 111,000 miles on it. It runs fine once I take off.


no check engine lite? if not pull the air intake tube and look for a dirty throttle body. the idle air valve may be unable to seat so it is searching and needs cleaning. use a carb cleaner that is safe for throttle plates. and use your finger to rub around the plate to clean the gunk off

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2003chevy pu dies at stop lights, low idle whats wrong?


yea id definately try cleaning ur throttle body 1st. My 03 1500hd had the exact same bad idle after my battery went bad it would die at lights unless i kept foot on gas i cleaned throttle body runs perfect now took 30min cost 8$ for cleaner at autozone and theres how to videos on you tube

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Trail blazer runs well at hiway speed but after a trip, it idles well sometimes and other times runs rough, may die may not, sometimes even running away so you need to kill it to keep from crashing.


Have the trailblazer scanned for any DTC codes. Its sounds like you may have the TCC apply solenoid circuit shorted to ground, TCC solenoid blockage (easy fix in pan), or TC broken (must remove trans and replace TC). If your lucky it's just a dirty Idle Air Control (IAC) valve and can be cleaned with throttle body cleaner. Buy a can of throttle body cleaner and follow the instructions on the the can, make sure it's throttle body and not Carburetor cleaner. Carburetor cleaner is too corrosive to the gaskets used in the throttle body and pay attention to the IAC passage way in the throttle body. Good luck and keep me posted, and most transmission shop will scan the transmission for DTC codes free of charge for there test drive programs.

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1 Answer

Throttle body just replaced; now runs & idles rough


adjust the TPS, throttle position sensor.

First though, disconnect battery for 1/2 hour. Restart engine and drive for 15 miles while computer relearns changes you made. Will run rough for this period.

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