F***ed up my car.. need help

hardhitter · April 5th, 2008, 04:52 AM

I have a supercharged GT and today I was datalogging my car in 3rd gear from 2000 rpm to redline. Everything seemed okay until I got to redline and let off the gas. Then I heard the bypass valve go off and the car died. Since then I have not been able to start it again and had to have it towed back to my apartment. What should I look for as the problem? It still turns over and almost seems like it's going to start but won't. If I press the gas down while starting it fires up and instantly dies.

97Cobra · April 5th, 2008, 05:09 AM

clean the maf, check fuel pressure, and loock for the fuel cut off switch and see if its been triggered. if it has (cant remember) push or pull the switch. the switch should be in the trunk...

hardhitter · April 5th, 2008, 05:25 AM

Originally Posted by 97Cobra

clean the maf, check fuel pressure, and loock for the fuel cut off switch and see if its been triggered. if it has (cant remember) push or pull the switch. the switch should be in the trunk...

How would the MAF suddenly get dirty? I just put it on a couple of weeks ago. How can I check the fuel pressure? I have an electronic fuel pressure gauge but I don't think it calibrates until the car fires up. I checked the switch already and the fuses.

97Cobra · April 5th, 2008, 05:31 AM

with all the air comming through at high RPMs might knock particles loose. and if you just cleaned/oiled you air filter a lot of times that gunks up the maf.
just hook it up and make sure that when you turn the key that it has more pressure. make sure that none of the vacuum lines came undone as well.

hardhitter · April 5th, 2008, 05:34 AM

Originally Posted by 97Cobra

with all the air comming through at high RPMs might knock particles loose. and if you just cleaned/oiled you air filter a lot of times that gunks up the maf.
just hook it up and make sure that when you turn the key that it has more pressure. make sure that none of the vacuum lines came undone as well.

I checked all the vacuum lines multiple times while waiting for the tow truck. I've never cleaned the air filter or oiled it. It's about 2 months old. I can't help thinking I've done some kind of major damage.

97Cobra · April 5th, 2008, 05:45 AM

yeah well just keep checking the small things first. no need to worry too much intill you know for sure. I know when somthing bad happens to my car I worry and go insane then i find out its a simple fix. Im trying to think what elese it could be before telling you bad symptoms. well check your oil and smell it to see if you smell the scent of gas in the oil... if you do then you know its not so good. sorry Im not much of a help but Ill try...

hardhitter · April 5th, 2008, 05:51 AM

Originally Posted by 97Cobra

yeah well just keep checking the small things first. no need to worry too much intill you know for sure. I know when somthing bad happens to my car I worry and go insane then i find out its a simple fix. Im trying to think what elese it could be before telling you bad symptoms. well check your oil and smell it to see if you smell the scent of gas in the oil... if you do then you know its not so good. sorry Im not much of a help but Ill try...

Any help at all right now is great so thanks. I can hear the fuel pump turn on when I turn the key to on. Do you think it could be something to do with spark? Or could it be flooded somehow? I was going about 100mph when it died.

97Cobra · April 5th, 2008, 05:55 AM

possibly pull the s/plugs. pull one have a buddy turn the key once (quick) and see if it sparks, if it does you know its not the coils. wait do you have coil on plugs?

hardhitter · April 5th, 2008, 06:04 AM

Yeah stock coil plugs. After I tried to start it about 30 times it seemed like it got a little better at starting. It would like rumble really low and die.

97Cobra · April 5th, 2008, 06:09 AM

hmmmm im reallly tired so let me think for a little bit on this... damn graveyard shifts! lol

97Cobra · April 5th, 2008, 06:10 AM

could you fuel filter be clogged?

hardhitter · April 5th, 2008, 06:10 AM

yeah i know what you mean i'm gonna get some sleep.. hopefully some more people post some suggestions and i'll try them out when i wake up

hardhitter · April 5th, 2008, 06:11 AM

i just changed the fuel filter a few months ago so i would guess not?

Doc8224 · April 5th, 2008, 06:11 AM

How much boost are you pushing?

97Cobra · April 5th, 2008, 06:11 AM

do you have a OBD II Code reader? you should plug er in and turn the key on dont start a read the codes. see if it give ya any

hardhitter · April 5th, 2008, 06:11 AM

yeah i did that no codes

hardhitter · April 5th, 2008, 06:12 AM

~10 psi

Doc8224 · April 5th, 2008, 06:13 AM

when it idles low and rough does it sound like it has cams in it? realy rough idle? or can you not even get it to turn over?

hardhitter · April 5th, 2008, 06:16 AM

It turns over and just kind of grumbles and dies

Doc8224 · April 5th, 2008, 06:17 AM

Sure the bypass valve isn't stuck open?

April 5th, 2008, 04:52 AM	#1
hardhitter Enthusiast 1999 Mustang GT Join Date: Nov 2007 Location: Houston, TX Posts: 774	F***ed up my car.. need help I have a supercharged GT and today I was datalogging my car in 3rd gear from 2000 rpm to redline. Everything seemed okay until I got to redline and let off the gas. Then I heard the bypass valve go off and the car died. Since then I have not been able to start it again and had to have it towed back to my apartment. What should I look for as the problem? It still turns over and almost seems like it's going to start but won't. If I press the gas down while starting it fires up and instantly dies.

April 5th, 2008, 05:09 AM	#2
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Wyoming Posts: 6,518	clean the maf, check fuel pressure, and loock for the fuel cut off switch and see if its been triggered. if it has (cant remember) push or pull the switch. the switch should be in the trunk... __________________ Modifications and pics in my Garage... Reps Appreciated!

April 5th, 2008, 05:31 AM	#4
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Wyoming Posts: 6,518	with all the air comming through at high RPMs might knock particles loose. and if you just cleaned/oiled you air filter a lot of times that gunks up the maf. just hook it up and make sure that when you turn the key that it has more pressure. make sure that none of the vacuum lines came undone as well. __________________ Modifications and pics in my Garage... Reps Appreciated!

April 5th, 2008, 05:45 AM	#6
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Wyoming Posts: 6,518	yeah well just keep checking the small things first. no need to worry too much intill you know for sure. I know when somthing bad happens to my car I worry and go insane then i find out its a simple fix. Im trying to think what elese it could be before telling you bad symptoms. well check your oil and smell it to see if you smell the scent of gas in the oil... if you do then you know its not so good. sorry Im not much of a help but Ill try... __________________ Modifications and pics in my Garage... Reps Appreciated!

April 5th, 2008, 05:55 AM	#8
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Wyoming Posts: 6,518	possibly pull the s/plugs. pull one have a buddy turn the key once (quick) and see if it sparks, if it does you know its not the coils. wait do you have coil on plugs? __________________ Modifications and pics in my Garage... Reps Appreciated!

April 5th, 2008, 06:04 AM	#9
hardhitter Enthusiast 1999 Mustang GT Join Date: Nov 2007 Location: Houston, TX Posts: 774	Yeah stock coil plugs. After I tried to start it about 30 times it seemed like it got a little better at starting. It would like rumble really low and die.

April 5th, 2008, 06:09 AM	#10
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Wyoming Posts: 6,518	hmmmm im reallly tired so let me think for a little bit on this... damn graveyard shifts! lol __________________ Modifications and pics in my Garage... Reps Appreciated!

April 5th, 2008, 06:10 AM	#11
97Cobra I Post Entirely Way Too Much 1997 Mustang Cobra 1/8 - 8.89@86mph Join Date: Jan 2006 Location: Wyoming Posts: 6,518	could you fuel filter be clogged? __________________ Modifications and pics in my Garage... Reps Appreciated!

April 5th, 2008, 06:11 AM	#13
hardhitter Enthusiast 1999 Mustang GT Join Date: Nov 2007 Location: Houston, TX Posts: 774	i just changed the fuel filter a few months ago so i would guess not?

April 5th, 2008, 06:12 AM	#17
hardhitter Enthusiast 1999 Mustang GT Join Date: Nov 2007 Location: Houston, TX Posts: 774	~10 psi

April 5th, 2008, 06:16 AM	#19
hardhitter Enthusiast 1999 Mustang GT Join Date: Nov 2007 Location: Houston, TX Posts: 774	It turns over and just kind of grumbles and dies

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