Question about 1995 Mercury Cougar

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My cougar wont start it is getting great spark gets plenty of air and has new fuel pump,filter,new cam sensor injecters are clean has plenty fuel pressure,i can pour gas in the intake and it will run for a minute until the gas runs out then im back with the same problem i am all out of guesses of what it can be

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Best guess is your injectors arent opening so i would change the ecu it is located on passengers kick panel next to door jam ... any codes thrown?

Posted on Apr 03, 2009

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Why wont start


Ok well there is only two things that make a combustion engine run! If you are getting gas to the fuel rail and it has adequate fuel pressure at the rail then you have a spark problem! Pick up a spark tester( looks like a plug wire in a way but has a light ) Plug it into the first plug on the right side of the motor,(# 1 cylinder) and have a friend turn over the motor. There should be positive spark and the light indicator should light as a constant . If it is intermittent in any way than spark is why u will not start. Then on these years I always start with a new coil or coil packs depending on your type of engine! Hope this helps!! Just my opinion and I could be wrong ! Good luck.

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There is spark and fuel up to rail but injector wont come on


sounds like the injectors are not getting a signal to squirt or no fuel . Have a pressure test done on the fuel manifold to check pump, pressure regulator pressure and filters.. check injector connection to ECM

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I got my 1997 mecury cougar spark plugs changed and a week later my car lost power and stopped running.ive changed a fuel filter,batterie and coil paks on it.it doesnt want to start


you'll have to see if its missing fuel,air,or spark.Fuel could be bad fuel pump,air something clogging air filter duct,spark bad coil,or coils,crank sensor.

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1 Answer

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If it is getting spark I will assume the timing belt is working.
You say the fuel pump is good, so what is the fuel pressure at the rail ?
Are the spark plugs wet or dry ? Can you get it to try to start by using starting fluid ?
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1 Answer

Wont start unless I spray starting fluid into air cleaner. run great after that but if you turn it off you have to use starting fluid again . have put new wires plugs rotor cap distb. capand K&N...


A poor spray pattern in the injectors can cause starting issues. Have you tried a good (read not really cheap) fuel injector cleaner like Chevron Techron or Valvoline Synpower fuel system cleaner? A weak ignition system (worn spark plugs, leaking wires) can cause starting issues. You mentioned that it has a K&N filter on it. These filters use an oil in a cotton media to filter out dirt. Sometimes that oil can get out of the filter and contaminate the mass air-flow sensor. Follow the air tube after the filter box and you'll find a sensor in the tube with several wires running from it. It is made from aluminum and the wire housing is plastic. Remove it from the tube and clean it with a mass air-flow sensor cleaner. You HAVE to use a mass air-flow sensor cleaner specifically made for mass air sensors. Don't use anything else like carb, brake, or throttle body cleaner. Those cleaners will leave a residue on the sensor and just cause you more issues.

As for your fuel pressure, the system pressure with the key on, engine off is 60-66 psi. Do you really think you could visually tell the difference between 60 psi and 40 psi? I know I couldn't. You'll have to use a fuel pressure gauge to verify the pressure. For my money, I think your pressure is low. But, cleaning the MAF is much easier then putting a tester in, and it wouldn't hurt, so I would do that first.

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When it starts it runs fine..when it does not have to wait one or two day and then it will start ok..now it has been 3 days and car will not start..on going problem and the local ford dealer has no...


3 things to start up the car, air, spark and fuel. First make sure no issues with battery. Check if fuel is being pumped, if not check fuel filter and then pump. If ok, then check for spark, if no spark, check leads and then coil pack. If ok, check mass air flow sensor. There could be other issues like crank angle sensor, or knock sensor, cam sensor. Since you have been to the dealer I assume that the dealer has scanned ecu for fault codes. So check the above 3 things and let me know how you go.

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1 Answer

Was running-stalled-turns over but will not fire.gas guage wont move and gas light stays on


check and make sure you have plenty of fuel in the tank. gas light should not be on as long you have plenty of fuel in the tank unless you have faulty fuel level sensor. check if you getting sparks and fuel, pull wire and one plug out, ground it to the vech have a friend turn over the engine and see if you getting strong sparks. no sparks check coil having 12V, good coil, cam sensor faulty. check if you getting fuel, pulling hose from the fuel filter line, point it down ward wrapping the end with clothes covering the hose and turn the engine over, see if you getting proper fuel and good pressure coming out of the line using your thumb slightly cover the fuel line. no pressure or fuel, check the fuel pump, good pump, faulty crank sensor. both crank and cam sensor work the same way, one telling computer to send sparks to the plugs and other turn on the fuel pump.

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The cheapest way to go is to change the fuel filters first and the air filter. Then I would change the crankshaft sensor.

You may have to bit the bullet , and have the fuel pump changed before the fuel injection pump. The fuel pump in the tank can be loosing pressure to the fuel injectoin pump.
I think the lesser cost is the fuel tank pump vs. the fuel injection pump.

The system runs of fuel and air. No spark like on a gas engine.

So the problem can only be lack of fuel or lack of air getting into the vehicle air induction. A restriction in fuel or air will make the engine run poorly.

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1 Answer

My s10 will turn over, but wont squirt gas through injecter


Does it crank? Do you have any codes? Check engine light? Do you have spark? No spark check coil, and connections, also it would be nice to know what year it is. Get codes read. No crank check battery and starter. No codes or lights check crank position sensor, make sure your pcm is good after replacing your ignition mod you could have blown it if you did do it right. (engine computer) Check cam sensor if applies. Crank and cam could prevent it from starting and I know one I think cam controls pcm's fuel delivery on gm's

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