Crank but no Start

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Old Feb 6, 2024 | 09:05 PM
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Crank but no Start

Hey y'all, recently my 07 TL gave out on my way driving back from classes. I pulled over and saw my belt was tearing so I went ahead and replaced it. when I tried starting it, it wouldn't start. I had electrical problems already because the alternator was iffy, so I replaced that, tried starting and wouldn't start. I then replaced the starter, still wouldn't start. I then got a bigger connection for my battery terminal and still no start. Charged the battery, no start. I have new sparkplugs too, I smell gas each time I crank it, but still no start. What am I missing? Could the ignition coils be bad?
-New Alternator
-New Sparkplugs
-New Starter
-New Relays
-Charged Battery

I can attach a video of me turning it later tomorrow but any help would be appreciated.
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Old Feb 7, 2024 | 07:04 AM
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Miles? Do you know when the last time the timing belt was changed? Where there any CEL's before this started happening? Which relays did you switch, and why?

Engines need 4 things in order to run;
1) air (you can pretty much assume it's getting this),
2) fuel (smelling gas while cranking is 1 thing, but visually looking at the injectors firing is a pretty convincing evidence. Do you hear the fuel pump priming when turning the key to the 2 position?)
3) spark (easy to test with a spark tester, or simply grounding the plug while cranking)
4) compression (easy to test with a compression tester)
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Old Feb 7, 2024 | 07:43 AM
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Pair of TLs's Avatar
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You're going about this all wrong, just throwing parts at it willy-nilly.

What do you mean, it "gave out?"

My first guess would be timing.
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Old Feb 7, 2024 | 11:24 AM
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Charge the battery and then get it tested to rule that out or throw in a known good battery and try starting.
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Old Feb 7, 2024 | 12:01 PM
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From: Colorado
Originally Posted by twokexlv6coupe
Miles? Do you know when the last time the timing belt was changed? Where there any CEL's before this started happening? Which relays did you switch, and why?

Engines need 4 things in order to run;
1) air (you can pretty much assume it's getting this),
2) fuel (smelling gas while cranking is 1 thing, but visually looking at the injectors firing is a pretty convincing evidence. Do you hear the fuel pump priming when turning the key to the 2 position?)
3) spark (easy to test with a spark tester, or simply grounding the plug while cranking)
4) compression (easy to test with a compression tester)
I'm at 180k Miles on the car and the timing was done at 160k. The only CEL I had before was for my transmission and another time it didn't start was when I had just filled it up with gas and the car didn't crank over immediately. The relay I swapped out was the fuel pump relay because I was reading on here that some people where getting no start due to that relay. I will get these tools and test these things, Thank you.
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Old Feb 7, 2024 | 12:03 PM
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Originally Posted by Pair of TLs
You're going about this all wrong, just throwing parts at it willy-nilly.

What do you mean, it "gave out?"

My first guess would be timing.
I mean the car stalled out on the road, the belt somehow got torn
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Old Feb 7, 2024 | 01:05 PM
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here is a dropbox link to a video of the car, I confirmed that the pump is turning on and delivering gas. but here is me trying to start it. Could it be just from the sound of it that I'm not getting compression?

https://www.dropbox.com/scl/fi/5o5c8...r92b3wm4c&dl=0

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Old Feb 7, 2024 | 03:17 PM
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From: SE WI
Check. Your. Timing.
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Old Feb 7, 2024 | 04:12 PM
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Originally Posted by Pair of TLs
Check. Your. Timing.
okay, where would I check that? The top of the cover? I had also recently replaced my harmonic balancer, could that have affected the timing?
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Old Feb 8, 2024 | 04:46 PM
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Originally Posted by Pair of TLs
Check. Your. Timing.
it isn’t the timing. Both ends have it perfect when i rotate the crankshaft to have the key in vertical. So im assuming im getting either no spark or no compression.
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Old Feb 9, 2024 | 08:14 AM
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Originally Posted by DarkCrimson
it isn’t the timing. Both ends have it perfect when i rotate the crankshaft to have the key in vertical. So im assuming im getting either no spark or no compression.

Did you check only the camshafts timing? Or crank + two cams?
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Old Feb 11, 2024 | 01:27 AM
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Originally Posted by twokexlv6coupe
Did you check only the camshafts timing? Or crank + two cams?
Only checked the two cams, I'll be checking the the cams and the pulley when I get some better weather. But lets say its not timing, then would it be compression since I hear my fuel pump going?
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Old Feb 12, 2024 | 07:37 AM
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Unless you did something dumb that you're not telling us (like a money-shift), you don't really lose compression at a flip of a switch like it sounds like you did. To just spontaneously die like that while driving, something immediate happened; like a timing belt slipped a couple teeth from a failing tensioner.
The harmonic balancer drives the power steering, alternator and A/C; nothing to do with the timing belt.

Have you checked for spark yet? And just because you can hear the fuel pump, doesn't necessarily mean the injectors are firing and squirting fuel into the cylinders.
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Old Feb 24, 2024 | 12:42 AM
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It was infact timing! But not only that, one of the valves bent when the timing went out. Figured that out after I retimed the car and tried starting it up :p timing slipped because the serpentine belt tore its self and ate away inside the car while spinning.
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