Question about 1994 Toyota Corolla

Open Question

My 94 corolla runs good when its cold but after it warms up it loses power i have replaced the tps

My car loses power when it warms up and i have replaced tps and plugs and the wires?

Posted by Anonymous on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 1861 Answers

SOURCE: tps sensor

There are 2 screws that hold the TPS on to the side of the throttle body. Before you take the old TPS off, note where the TPS is located regarding the adjustment slots. Remove the 2 screws, and remove the old TPS, install the new one, and try to achieve the SAME adjustment. If you get the adjustment wrong, the engine will idle up & down. If it does, move the new TPS slightly until the idle smooths out.

Posted on Oct 11, 2008

Ad
  • 141 Answers

SOURCE: bad stumble on acceleration pops through t- body.

Sounds like the fuel pressure regulator. Could also be that the timing jumped. But I'm leaning towards the pressure regulator. Hope that I could help. Best wishes.

Posted on Jan 17, 2009

  • 15 Answers

SOURCE: car idles and runs rough intermittently after engne is warm.

one of you air line pipes could have collapsed or split which will cause a problem with idling and performance and it will give no smoke signs

Posted on Feb 13, 2010

SOURCE: 1990 4Runner, 3.0 L engine, won't hold idle, wants

Have you looked at your idle air control valve What is it? This is an electrically driven valve that allows additional control over the throttle at idle Where is it located? The IAC is located on or adjacent to the throttle body and consists of a small device held on by two bolts with an electrical connector.
How does it work? When the throttle is closed the throttle plate closes off any air from the intake manifold. In order to stop the engine from stalling due to lack of air the IAC opens a small valve allowing air to pass from the air ducting to the intake manifold. Often the IAC components consist of an air inlet port in the inside wall of the throttle body, immediately in front of the throttle plate, with a similar exit port behind the throttle plate. Connecting the two ports is a motor driven valve. When the valve is opened air effectively by-passes the closed throttle plate to maintain the engine at idle. The IAC also augments the throttle when additional power demands are put on the engine such as steering.


Symptoms of faulty IAC

  • Poor starting: If the IAC fails to open or the inlet/exit ports are clogged shut with carbon the engine may start and then promptly stall. The engine can be kept running by pressing the accelerator. However any additional demand on the engine such as power steering or putting the car into drive (automatic) will cause the engine to stumble badly and often stall.
  • Engine cut out: Even with the engine warmed when the vehicle is stationary such as at a red light the putting of the transmission into of 'drive' to pull away before the accelerator is pressed can cause the engine to stall. (Note this differs from the TPS fault which causes engine stall due to the accelerator being pressed too quickly)

How to check? Physically remove the IAC but keep the electrical connection to it. Temporarily block off the now open ports on the throttle, turn the engine on and examine the IAC valve action in response to additional loads (power steering inputs etc). The valve should open and close according to demand.

How to fix? If the motor of the IAC has failed then replace the IAC. If the valve is gummed closed by baked oil and carbon then clean it thoroughly with carburetor choke cleaner spray and a cloth. Similarly if the entry and exit ports on the throttle body to the IAC look blocked again clean them out thoroughly.

Posted on Jun 03, 2010

Testimonial: "Fast response and good advice, I'll try these suggestions and let you know the results."

  • 361 Answers

SOURCE: 2005 toyota corolla low idle

idle air control valve can be removed and cleaned

Posted on Sep 05, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2001 mazed tribute runs good no power to go up hills ?


Search Results

    Bogging - lack of power going up hills ' SHO Forum

    www.shoforum.com/index.php?threads/bogging-lack...power...up-hills...
    Oct 17, 2006 - I just ran into my first problem - The car runs fantastic on flats, going downhill,... ... No problem pulling up that hill at slow speed - plenty of power. It's only when out on a ... Anyone got a handle on a good used torque converter?

    why do i lose power on hills - CarGurus

    www.cargurus.com > Questions > GMC > Sierra 1500

    CarGurusOct 17, 2013 - I lose power on hills change the fuel pump and checked timing changed catalytic ... The TPS will make the ECU "go nuts" as it says...I'm here. ... has no power going up hill with small boat on, on flat ground runs good 1 answer.

    2000 toyota corolla lx aut. 4cyl. car looses power no power ...

    www.cargurus.com > Questions > Toyota > Corolla

    CarGurus

Mar 28, 2015 | 2001 Mazda Tribute

2 Answers

My 94 corolla runs good till it warms up then the check engine light comes on


if the check engine light is on then you will have to have the code pulled so you know what tests have to be done to find the cause of the problem.

May 15, 2014 | 1994 Toyota Corolla

2 Answers

What happens if the drive belt breaks


if a drive belt breaks, the debris can interfere with other engine components and do additional damage. rule of thumb belt life is 6yrs or 60000 miles. the belts operate critical engine systems ( alt, water pump, power steering pump) not something to short cut on. belts are noisey when cold due to additional load from battery use when starting or cold fuuids. have belts and tensioners checked for wear and correct operation

Jan 13, 2013 | 1994 Toyota Corolla

1 Answer

I drive for a while and its fine then out of the blue it feels like it doesnt want to go like its losing fuel until I floor the gas and it runs fine again and it will do it again whenever it feels like it....


If by losing fuel you mean it wants to stall whenever your foot is off the accelerator, than you are correct, the TPS is usually the culprit It's common for a car with a bad TPS to run great when the engine is cold and want to stall when you come to a stop. Other symptoms of a bad TPS is a stalling problem when warm and the car is in park. Running a diagnostic test will probably show a bad MAF sensor as well but the 2 parts work hand in hand and a MAF sensor alone doesn't usually fix the problem.

Jul 30, 2011 | Jeep Cherokee Cars & Trucks

1 Answer

1986 Nissan King Cab pick up. Runs good when giving gas, but cuts off at an idol. Have replaced Altenator.


Based on the information provided, it sounds like a bad TPS (Throttle Position Sensor). The TPS controls your idling speed under all conditions. When a TPS goes bad, you will usually notice the vehicle will idle when the engine is cold but once warm or with the AC on, it will sputter or stall.

Jul 18, 2011 | 1986 Nissan King Cab

1 Answer

After my 94 plymouth voyager 3.0L gets to runnig temp it misfires and stalls once in gear.It runs fine when its cold. I did a tune-up and still have the same problem


Have fuel pressure checked when it starts to misfire/stall and driving down the road at normal speeds.
Not unusual for fuel pump to run at proper pressure when cool, but lose pressure when warmed up. If it's only running bad when off accelerator and stopping or turning and runs down the highway good, remove and clean AIS/IAC motor. ( idle speed motor ) Once cleaned, if it runs better for a while then starts to act up again, replace it.

Jul 16, 2011 | Plymouth Voyager Cars & Trucks

2 Answers

Runs good cold then loses power when it warms up


have your spark plugs changed. use the correct specification.

Apr 28, 2010 | 1989 Ford Bronco II

1 Answer

Saab 95 2002 3.0l v6 turbo. when warm, starts to


Have you had your mass air meter checked or replaced? This is the unit attached to the air intake hose behind your air filter. It senses the air temperature, speed, density, etc... and adjusts the fuel/air ratio to keep the vehicle running at "peak" performance. Also, check your TPS (throttle positioning sensor) it can also cause the problem you speak of. The TPS adjusts your engine speed/idle etc. and also compensates for hot/cold changes etc. This is roughly a $35.00 part and in most cases usually an easy fix.

Nov 01, 2009 | 2003 Saab 9-3

1 Answer

94 eldorado stalls


First impression is a MAP sensor. If you take the car to a service station or an auto parts store that features free diagnostic tests, I'm sure the MAP sensor fault will appear. Other cause could be the TPS which controls the idle at cold,warm, and AC operation settings. It's possible that you're stalling due to insufficient idle speed setting on the TPS.

Jun 30, 2009 | 1994 Cadillac Eldorado

1 Answer

94 Lincoln TC engine stalls when slowing/stopping


Most common cause of stalling for Lincolns in that era is the TPS (Throttle Position Sensor). It regulates fuel mixture, idle speed etc. A bad TPS will usually act up in one of two ways:
  1. When cold, car continually stalls
  2. When warm, car stalls when slowing down (especially if AC is on)
As far as valve cover oil leak, it's a problem that should be addressed to keep oil from fouling your spark plugs but highly unlikely to be the cause of your stalling problem. Hope this answers your question. All the best.
Greg

Jun 16, 2009 | 1994 Lincoln Town Car

Not finding what you are looking for?
1994 Toyota Corolla Logo

Related Topics:

12 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8557 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...