Question about 1995 Mercury Villager

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Losing power need to know when the data hook for the computer is to get read out on engine

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  • missy2112 Apr 19, 2009

    looking for where to hook up diognostic tool for check engine light ?


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Gray connector above the fuses inside the vehicle

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Toyota duet Engine Check light comes on, engine drags, loses power. Come back to normal only when fully accelerated. What could be the problem.

there is a data point for code reading but the code is in flashes of a test light ( before ob11 times
you will need to find an old time mechanic with experience on your machine or older machines to be able to get the codes out

May 09, 2016 | Toyota Cars & Trucks

3 Answers

Dying, not starting after it's been warmed up. Runs beautiful on cold engine. Replaced plugs, wire, cap, rotor and crank position sensor, no luck.

Your car cold start valve puts more gas into the system keeping your engine running higher RPM. When you car warms up, the cold start valve will stop working and your car RPM will drop. What you could have is a vacuum hose disconnected which puts more air into your engine - therefore when you press on the gas pedal, your engine would shut off or you find lack of power and then shut off.

Mar 27, 2015 | Cars & Trucks

6 Answers

I have toyota Gaia wit 1az-fse engine when engine check light comes on it loses accelleration power,so we changed the fuel pressure sensor nothin changed next we changed computer bt after some time th

In stead of changing what is not wrong, save money and time by having the fault codes read and fixing the fault
check engine lights refer to both an engine problem and a transmission problem so what you may have could be in the transmission.

Jan 03, 2015 | Toyota Cars & Trucks

1 Answer

What causes the engine to buck and jump after the engine warms up?

There could be several things that would cause the symptoms.

First thing, is the "service engine soon" light on?

If it is, then you need to get any stored codes to help narrow the possibilities down. It would really be a help to you if you could get a scan tool that will actually show live data.

The reason I say that is, there are sensors which can cause your Buick to run rough, stumble, and belch after it warms up and not "throw a code".

The one sensor I know will do this is the coolant temperature SENSOR.

IF that particular sensor goes bad, it will NOT set off the service engine light, but it will tell the main computer that the engine is colder than it actually is. (It will usually default to tell the computer the engine temperature is -40° . Yup, you read that right. 40 degrees below zero.

When the computer thinks the engine is that cold (whether it's warmed up or not) it will keep the fuel mixture like the engine is cold. Sending signals to the injectors to keep dumping more fuel until the engine is warmed up. Problem is, according to the temp SENSOR, the engine is always cold so the 'puter keeps dumping the fuel to try to get the engine warmed up.

This is only one example and I'm NOT trying to encourage to "fire the parts cannon" at your car (replacing parts in hopes you fix the problem).

What I am trying to get you to do is, even if there is no service engine soon light, is to get someone to hook a scan tool that can read live data on an OBD I (on board diagnosis, 1st generation) to see if there is a sensor not giving the proper information to the computer.

Hope this helps.

Oct 10, 2014 | 1992 Buick Century

1 Answer

Fan not working

the engine computer grounds the fan relay based on data from that sensor. if the sensor is unplugged the computer turns the fan on to protect the engine from overheating. so that part of the system is working.
for some reason the sensor is not telling the computer the engine is hot enough to need the fan.
you would need to use a scanner to watch the data signal coming from the sensor as the engine warms up to check it.

Jan 31, 2014 | 2000 Hyundai Sonata

1 Answer

What's your problem?car loses power on highway

The engine in this cars drive train is fully electronically controlled by a computer called the PCM. Whenever a problem like this occurs the computer stores a record of the problem in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s)

Jul 03, 2012 | 1993 Ford Crown Victoria

1 Answer

I would like to remove battery cables without losing data. is this possible?

The only way I know you could do it is to hook some jumper cables from your cables to another battery while you unhook them till there re hooked. Just be very careful not to arc them together and or set them on something metal, that would let them arc. If you do let them arc together you could fry something.

Mar 11, 2012 | 2008 Lincoln MKX

1 Answer

I have a 2004 X type 2.1. Only 64,000 on the clock. After 20 mins running it suddenly loses power. If switched off and restarted later it runs perfectly again for another 20mins or so then loses power...

It sounds like your computer is going into "Reduced Power Mode". Your Check Engine light should also be on when this is happening. If it is not, then there may be a computer malfunction that is preventing the computer fom illuminating the light. The ONLY way to determine what is going on is to scan your engine computer for fault codes and read the available engine data with a sanner to see which of the HUNDREDS of possible circuit and component failures is causing this.

Oct 20, 2011 | 2004 Jaguar X-Type

2 Answers

2001 jeep cherokee sport 6 cyl 4 wdr cranks want start

If the data link is not talking to the computer check your ground at the computer and at the data link connector to see if the computer is even alive ground pin 3 on DLC with the key off then turn key to the run position if it flashes the check engine codes record them, if no engine light, does the engine light come on when you turn the key on then go off? if not, check fuses if not check power for pin on computer, if it has power you have a bad computer. But TEST THE GROUNDS IT IS THE BIGGEST FAILURE For these rigs or any manufacture. check that you have power also at the DLC too. if not you need a digital ohm meter and a subscription to http:/// and start reading the campaigns on that vechile for computer and trouble tree for dead DLC and computer. I don't have that subscription or I could tell you more where to look, if you need anymore help let me know. Also if the crank sensor could cause it not to run the fuel pump but so can the cam sensor. You need to find out if the computer gets it's pulse for the pump at the computer if it does then you need to test them both. There are three wires a ground a colored power wire and a wire to go to the computer you can test these sensors with a meter to see if there is a pulse to each. sometimes the fuel pump gets it's signal from the coil pack so it's important to have the subscription, you can do a search for each item and test them as needed and has a wiring diagram.

Jul 26, 2009 | 2001 Jeep Grand Cherokee

2 Answers

Loses Power

travis do u have the mass air flow hooked up? what all is hooked up n what is disconected.? try fuel filter though. also if ya have a smart gm tech as afriend he could hook up tech2 n solve that by lookin at the data values

Jun 15, 2008 | 1997 Chevrolet Cavalier

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