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2k Cougar will not start at times?
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btroy
New User
Mar 3, 2009, 3:18 PM
Post #1 of 4
(975 views)
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2k Cougar will not start at times?
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Hello guys , first time poster here, looking foar alittle help on my car. Car experience: rebuild muscle cars and all maintenance on all of my vechicles 20 years.
2000 Cougar 2.5l V6 , 156k miles, at times the vechicle will not start, I have spark so I have a fuel problem. Cranks fine.
I removed the fuel cap to see if I could hear the fuel pump engergize,I do. After I reinstalled the cap the car starts. ???? There is always a period of time (days) between incidents.
I tried this several times and removing the gas cap always lets the car start.
Could a bad fuel cap cause this issue?
Could releiving the pressure in the tank be an indication the fuel pump maybe going out?
BTW this is a trhrottle body type engine
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Loren Champlain Sr
Veteran
/ Moderator
Mar 3, 2009, 4:22 PM
Post #2 of 4
(973 views)
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Re: 2k Cougar will not start at times?
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It would definitely be worth replacing the fuel cap. They are very inexpensive. I've only run into this problem, maybe a half dozen times, and drove me nuts every time. When you remove the cap, do you hear a whoosh?
One would think that an electric fuel pump could overcome the vacuum created by a plugged cap, but I have seen it. Had one in a few months back, that it held so much vacuum, that is was distorting the plastic fuel tank!
Loren
SW Washington
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btroy
New User
Mar 3, 2009, 6:13 PM
Post #3 of 4
(970 views)
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Re: 2k Cougar will not start at times?
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thanks for the reply I will replace the cap. I have never heard of this happening (but then that doesn't supprise me !;)
Thanks again
Troy
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Mar 3, 2009, 7:40 PM
Post #4 of 4
(964 views)
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Re: 2k Cougar will not start at times?
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To add: It was a long thread here a few years ago with a car that would die out at so many miles after getting gas causing all kinds of diagnostic guesses. Finally came up with the gas cap was accidentally switched at a gas station on that car and it needs to be the exact right one for the vehicle for evap emission controls and the tank was creating a vaccuum that the fuel pump couldn't overcome! Crazy but that happened. Certainly could happen to an original cap for odd reasons too.
Too cheap not to try but do make certain it's the correct cap!
T
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