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Old 09-27-2013, 03:03 AM   #1
epicskater96
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what just happend

i was driving down a highway at 55mph, i started slowing down and didnt let off the gas. i pushed the gas down more and my car bogged down and then i procceded to down shift to 5th gear and still did the same thing. i put it in netural and it just died. i pulled it off to the side of the road and tried to start it again and it didnt sound quite right and i heard a loud knock and quit. what happend??


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Old 09-27-2013, 04:31 AM   #2
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First thing i'd do is get it checked for any Error Codes sitting underneath, could be fuel pressure.
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Old 09-27-2013, 05:57 AM   #3
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First thought is fuel pump died.

If the battery can still spin the engine (like starting) but it does not start.. then at least you know the engine can still turn freely. So it is NOT main bearings NOR some mjor internal engine failure. Also not the charging system. Though it could be no spark.

I still would say first bet is the fuel pump is gone.

One loud knock is probably one cylinder ready to fire as engine stopped and a backfire from that cylinder. No big issues from that happening usually.

Last edited by Elizabeth; 09-27-2013 at 07:42 AM.
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Old 09-27-2013, 07:44 AM   #4
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If starter sounded somewhat different from normal you may have lost the timing belt, on SVT the more you try to start the engine the more valves you will bend.

You can check fuel pump spin up by carefully listening as you turn the key till lights come on, you will hear the pump spin up for like a second, if so pump probably OK.
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Old 09-27-2013, 07:44 AM   #5
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The last time I had a car lose power like that, it was out of oil.
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Old 09-27-2013, 09:52 AM   #6
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Quote:
Originally Posted by amc49 View Post
If starter sounded somewhat different from normal you may have lost the timing belt, on SVT the more you try to start the engine the more valves you will bend.

You can check fuel pump spin up by carefully listening as you turn the key till lights come on, you will hear the pump spin up for like a second, if so pump probably OK.
This too. The fuel pump makes a soft wrrr when you turn on the key. Maybe you know the sound?

Anyway ?? Wouldn't the engine have made a variety of 'bad' sounds when it was losing power.. basically bending valves etc.. (if the timing belt went??)
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Old 09-27-2013, 10:26 AM   #7
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How many miles does your SVT have?

When was the last time the timing belt was changed?
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Old 09-27-2013, 01:59 PM   #8
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Sounds like what happened to me a few months ago. Click for details. My problem was just shitty gas, which may or may not have killed my fuel pump. Fuel pump and filter got replaced, and I had to burn off that tank of gas to get it to run right again.

That said, the safest thing to do is to NOT try start it up again til you check the timing belt. If it looks ok, do the fuel pump key check, keep in mind that its pretty quiet so do this check in a silent garage if possible. If that seems ok, see if you are getting fuel pressure, you'll probably need a handheld tuner or some other tool to do so. Consider replacing the fuel filter, it's cheap and easy as long as you don't have rust issues. Then check spark plugs for spark and damage, or just replace them to be safe. If it still won't start or run right, just try to drain the tank and replace it with good gas. Cheap to try. Then look at replacing the fuel pump, or look elsewhere.

Good luck!
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Old 10-05-2013, 03:49 AM   #9
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so yea it was the timing belt.... blew out my head :( 2 weeks ill have it back and 2500 dollars later. but ill have it back on the road. thanks guys
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Old 10-05-2013, 03:50 AM   #10
epicskater96
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btw the loud knock was my intake manifold popping off and the car has never had a timing belt done at i just broke 100,000 miles
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