4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

STILL WON'T START

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Old 10-25-2008, 01:35 PM
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97modifiedmustangGT
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Default STILL WON'T START

Well I don't know if anyone will remember but about a week ago i had a thread about how it is the first start after my head swap and it won't start. Today i pulled the timing cover off because while trying to start i had a very small intake tube backfire so people suggested timing. come to find out timing is dead on. I bought new tensioners because i thought mine were bad so i will be resetting timing anyway with the new tensioners. where do i look now??
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Old 10-25-2008, 02:18 PM
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WhiteFoxGT
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Hm...

I dont remember if you covered this before but do you have fuel pressure? Injector pulse? And did you swap to COPs or do you still have the 2 coils with wires? Do you have spark? Also, when you are cranking it, does the THEFT light flash
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Old 10-25-2008, 02:33 PM
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Have the cams been off the heads? I'm not sure but I think the cams are different from right side cam and left side cam.
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Old 10-25-2008, 05:03 PM
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the cams were put on the right head, because you are right, it matters what side they go on. i have fuel pressure, i am still running coil packs, didn't look at the theft light but am pretty sure it was solid while cranking, i've got spark, the only thing i'm not sure on is the injector pulse. what is that light called that checks that? i can't think of it off the top of my head
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Old 10-25-2008, 08:47 PM
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car is ready to start for tomorrow. so i will let you know if i have the same problems.

And might i say, valve covers are a B to put on while the motor is in the car lol.
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Old 10-26-2008, 06:07 PM
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well i have strong cranking... but still no start. plenty of fuel, got spark, and theft light is solid. i have had a few very small sputter starts but then nothing after. i'm confused
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Old 10-26-2008, 09:37 PM
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Is the MAF calibrated to the injectors? Theres nothing in the way of the intake tube correct? Also, if you have cats, they could be clogged. Try unbolting the h-pipe from the headers an inch or two and see if it'll breathe. It almost sounds like the engine isnt breathing.
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Old 10-26-2008, 11:05 PM
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have you tried taking the serpantine belt off. Sometimes the alt will put out a freq. that affects the crank and cam signal to the pcm and cuase the car not to start. give that a shot and see what happens.
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Old 10-27-2008, 09:38 AM
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stock MAF, stock injectors, no cats. yeah i read about the alternator thing in another post and it won't start with the belt on or off.
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Old 10-27-2008, 10:00 AM
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something binding in the motor? too tight?
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