Question about 1991 Toyota Camry

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How to change air intake sensor

Car isnt shifting into overdrive runs rough at idle

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Clean mass air flow

Posted on Oct 27, 2012

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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losflip
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SOURCE: Air Intake Sensor that is located on the air filter box

It sounds to me like the sensor is bad, check engine light should be on to help diagnoise.

Posted on Dec 04, 2008

GARYca
  • 672 Answers

SOURCE: 2000 Toyota Tundra 4.7L V8 Rough Idle

Clean/Inspect Intake, MAF sensor, IAC valve for proper operation. Also check for vacuum leaks within the air intake hose and intake components. Hopefully this helps

Posted on Jul 20, 2009

  • 138 Answers

SOURCE: 1990 camry 4cyl 270k miles intermittant rough idle

Sounds like you have an intermittant problem, check all your wirirng, then you can move on to ignition related coil reluctor wheel ( in side the distribitor electronic control module again inside the distribitor. It could also be a fuel system problem do you hear the fuel pump come on when you turn on the key, the fuel pump should cycle until it devlops adequate pressure ( usually 3 - 4 seconds)

Posted on Sep 23, 2009

  • 1374 Answers

SOURCE: 94 camry. 2.2 fed emissions.

Before we both knock ourselves out with fuel injector testing. Hook up a Digital voltmeter (DVM) to upstream O2 sensor and lets see how she is burning. Remember positive lead of DVM to signal wire and negative lead to ground. Anything above 550 mV is rich anything below 350mV is lean. Be mindful that an exhaust leak the size of a pin hole in this region can cause a rough idle. A healthy reading should bounce between 550mV and 350 mV.
Next to test is O2 is working block off air in take making mixture rich and see what O2 says about it . Then pull off a vacuum hose (a lean condition) and see if DVM drops to 200to 300mV's.
Keep me posted.

Posted on May 10, 2010

  • 82 Answers

SOURCE: car starts but idles rough to then turn off, white

White smoke is a sign that you are burning antifreeze. You more than likely have a leaking head gasket or else a cracked head. Either way not good. Check your radiator for loss of coolant and air bubbles.

Posted on Feb 18, 2011

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Service engine soon light is on showed p0160 replaced an checked for bad wiring to the mas air sensor still rough idle in gear n now want to shake when it shifts into overdrive it shakes


MOST LIKELY A BAD O2 SENSOR...Potential causes of an P0160 code include: Holes in exhaust near post cat o2 sensor Bad Bank 2, position 2, o2 sensor Wiring problem, melted harness, broken connectors, etc. Bad PCM

Apr 16, 2015 | 1996 Chevrolet Suburban

1 Answer

2005 Dodge Ram 1500 4.7 Engine. Starts fine, Idles fine, but when engine shifts into high gear and RPM lowers engine runs really rough under load


Have you checked for a broken valve spring. Repaired a dodge engine with the same running issue as you have described and it was a broken intake valve spring.

Feb 22, 2015 | 2005 Dodge Ram 1500

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When I start My 1998 buick regal ls 3.8 it idles rough and stalls most of the time, the rpm's go up and down as soon as I let go of the key. If I step on gas for a few seconds it stays running. Motor


did you clean any carbon from the air intake and air passages around the idle control motor. carbon buildup around fuel injectors or intake manifold can cause this problem also.

Sep 20, 2014 | 1998 Buick Regal

2 Answers

What is wrong 95 BMW 318i starting issue and idle rough won't stat running?


Vane air flow (VAF) units are a common failure on these cars. It is the the sensor mounted inline on your intake tube that is aluminum and black plastic with a round twist plug. If you unplug it an it runs better that is most likely your culprit. The gentleman above is on the right track. Intake boot cracks/failures are quite common on these older cars too as are the EGR tubes/hoses - listen for air leaks/sucking noises.

The idle air sensor (IAC), made by Bosch looks like a small coke can with two tubes and a plug going to it. Sometimes they are hard to find/hidden under intake. They do go bad, but can usually be cleaned with car/brake cleaner. The internals should rotate; they are just an oscillating valve that regulates extra air to the intake.

You never said it it runs fine once it us up and going. If it does, it could also be a oxygen sensor. You should really consider having the codes read... it really shortens the list of parts to check!

Good luck!
-Scott
www.europartsplus.com

Jul 23, 2014 | BMW 318 Cars & Trucks

3 Answers

My 94 Toyota Camry 4 cyl is running really rough and stalling out once the engine warms up


1. Error Code 24. Intake Air Temperature Sensor.
Solution:
Check the following:
- IAT Connector and wiring.
- Intake Air Temperature Sensor.
- Engine Coolant Temperature Sensor.
- ECM.
2. Rough Idling when the engine is hot.
The following are the reasons due to which the engine can perform bad when it is hot.
- Fuel pump control circuit.
- Fuel pump pressure.
- Fuel injectors.
- Non Return Valve clogged, located on the lower side of car chassis above the fuel tank.
- Engine compression, valve clearance, spark plugs.

Apr 14, 2014 | 1994 Toyota Camry

1 Answer

My 1995 Mustang GT won't run right!


Your problem is it is a ford,LOL:

Nov 03, 2012 | 1995 Ford Mustang GT

1 Answer

1999 Escort ZX2 idling rough & not shifting in to overdrive


This could be caused by several things. Bad MAF sensor, TPS could be defective. You need to have the vehicle scanned for codes. You can have this done for no charge at AutoZone.

Nov 18, 2009 | 1999 Ford Escort

1 Answer

Engine idling erratically


I had to replace the air by pass valve when my 1987 ford ranger supercab was doing that... good luck

Nov 29, 2008 | 1995 Ford Ranger Supercab

2 Answers

Chevy 1/2 ton 2wd 4.3 vortec rough idle tried everything I know


I had the same problem with my 96 Chevy 4.3. It idled rough enough to shake the truck at a stop. It revved up fine but sputtered on take off. My truck did not want to stay in overdrive because of the low rev. I changed cap, rotor, plugs, wires and this did nothing. Finally I took the intake off and found corrosion on the side intake gaskets near the rear of the engine causing a vacuum leak.

Oct 10, 2008 | 1996 Chevrolet K1500

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