Engine not running?

Tiny
'90COUGARTURBO
  • MEMBER
  • 2 POSTS
  • 1990 MERCURY COUGAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 61,300 MILES
Alright, My car is a 1990 Cougar LS 3.8L,
It will not start on its own. If I spray carb cleaner into the throttle body the car will start and then it will keep starting the whole day long. When the car sits through the night in the morning I need to start over again with spraying carb cleaner. When the car is running it smokes black and misses. When you step on the gas the car wakes up and works fine.

I know it's none of the sensors under the hood because I have changed them all.
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Monday, September 21st, 2020 AT 11:14 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you hear the fuel pump come on when you turn key to run position -If so check fuel pressure if its within specs-if not check pump fuse and relay-
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Monday, September 21st, 2020 AT 11:14 AM (Merged)
Tiny
'90COUGARTURBO
  • MEMBER
  • 2 POSTS
Yeah forgot to add that, the pump turns on and the fuel pressure is exactly like it should be.
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Monday, September 21st, 2020 AT 11:14 AM (Merged)
Tiny
POKHREN
  • MEMBER
  • 3 POSTS
  • 1990 MERCURY COUGAR
Electrical problem
1990 Mercury Cougar Engine Size unknown Front Wheel Drive Automatic 135000 miles

I have 1990 mercury cougar v6 engine xr7 with supercharger. I am recently having problem with the start up when ever I wanna start my car I should ask for jump and it works for a day and next morning the battery is drained. I took it one of the mechanics and he told me its not problem withthe battery or the alternator but is the problem with battery drain, because I have a problem with my passsenger side seat belt motor it just makes noise when I start my car or if I open my door and there is always a seatbelt warning lights blinks on dashboard and makes noice

do u think changing the seat belt might solve my problem or there might be any other reason
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Monday, September 21st, 2020 AT 11:14 AM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Is it having trouble cranking the motor? If so then it is probably the seat belt and its motor. If the engien cranks full power and sounds good then its not the seat belt.
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Monday, September 21st, 2020 AT 11:14 AM (Merged)
Tiny
POKHREN
  • MEMBER
  • 3 POSTS
Thanks for your responce, I think its with the seat belt motor nothing is wrong with engine, so can my problem be solved by fixing motor or replacing a seat belt.

Other question is according to my car manual I am supposed to put premium unleaded fuel as a gas so is it gonna hurt my engine if I used unleaded fuel

navin
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Monday, September 21st, 2020 AT 11:14 AM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
It will probably fix your problem.

It should be ran on premium, or to save a few put in regular fuel and add a octane booster for 4-5 bucks per tank and it will be the same as premium.
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Monday, September 21st, 2020 AT 11:14 AM (Merged)
Tiny
BONDERICK
  • MEMBER
  • 2 POSTS
  • 1988 MERCURY COUGAR
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 101,000 MILES
Car has not been driven in a while. It has 1/4 tank of gas. When I turn over ignition fuel is reaching fuel rail, I am getting fire to the distributor. Car will not crank.
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Hi and thanks for using 2CarPros.

For the engine to run, you have to have spark to the plugs, proper fuel pressure at the injectors, correct ignition timing, and engine compression. Since it has been sitting, my first concern is the condition of the gas in the tank. I need you to try something for me. See if the engine starts for a couple seconds using starting fluid. If it does, the problem is fuel related. If it does not, then there is no spark. Do this and let me know the results.

Additionally, here are some links that may be helpful to you. Take a look through them.

https://www.2carpros.com/articles/car-cranks-but-wont-start

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

https://www.2carpros.com/articles/how-to-test-an-ignition-system

If you decide to test fuel pressure, the attached picture indicates the manufacturer's specifications.

Let me know what you find.

Take care,
Joe

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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
BONDERICK
  • MEMBER
  • 2 POSTS
I tried that and I also checked spark and I am getting spark plus the compression is strong.
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
If you have spark and good compression, it should try to start with starting fluid. Is that the case? If so, then we have to check the fuel injectors. If they are not working, fuel pressure or not, it will not get gas. If it does not fire at all with starting fluid, either timing is wrong, low compression (which you said is not the case) or you have an extremely weak spark.

Here is a link that shows how to check fuel injectors:

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Let me know.

Joe
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
SKYLAR90
  • MEMBER
  • 1 POST
  • 1988 MERCURY COUGAR
  • V8
  • 2WD
  • AUTOMATIC
  • 165,565 MILES
I was drivin last night and it was icey out then I spun out and when I stop the car died. Now it wont start. Wut do I need to do?
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
PURZNER
  • MEMBER
  • 11 POSTS
I believe your 1988 is the same as my 1989 Cougar.

If this is the case then if it was me I would check your Inertia Switch, My understanding that if you flip or spin out your car this switch is supposed to cut power to your fuel pump, to avoid dumping gas all over the place and prevent a major fire issue.

In my cougar it is located in the trunk compartment, underneath the rug on the driver side on the inside fender. Its right above a little relay for your fuel pump
the top of this switch should have a button, which should be sticking straight up if you triggered this switch. All you should need to do is push the button back in and it should reconnect power to this system.

But I should also state that my cougar is a 3.8 v6 and if you have a v8 it might very well be in a differnt location, but that is what I would be looking for.
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
NESSARAE
  • MEMBER
  • 1 POST
  • 1988 MERCURY COUGAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 115,000 MILES
This car drove off with the gas pump still in the tank, so the result cracked at the seem of the actual fuel tank. Gas pours out, and broke down because it ran out of gas. I poured 5 gallons of gas in the tank, and it still did not start. Could there be more wrong to it than jus out of gas? Could the loss of pressure in the tank be the cause?
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure fuel pump could be fried nothing to cool it down
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
GOUCH90
  • MEMBER
  • 2 POSTS
There is a switch in the trunk under the carpet by the driver side brake light check it and make sure it didnt cut off the button has to be pushed down or the fuel pump wont cut on
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
ALICEBELLAMY
  • MEMBER
  • 3 POSTS
  • 1988 MERCURY COUGAR
  • 2WD
  • AUTOMATIC
88 cougar 3.6 spins over, fires yet wont start. Probable causes for this are?
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
You have verified you have spark?

What about fuel. Be really quiet, turn the key to "on", can you hear the fuel pump cycle on, then shut off. May require your buddy to listen closely, near the fuel tank.

Results?

The Medic
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
DOGWOOD
  • MEMBER
  • 1 POST
  • 1984 MERCURY COUGAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 65,000 MILES
Motor rotates nospark
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Monday, September 21st, 2020 AT 11:15 AM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Do you have voltage going to your coil? If you have voltage going to the coil and none coming out of it replace the coil, also check the distributor cap and rotor.

You may need to check the cam and crank shaft sensors also.
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Monday, September 21st, 2020 AT 11:15 AM (Merged)

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