1990 mustang GT not getting spark please help

jays90foxbody · January 16th, 2012, 03:53 PM

The other night my 90 GT died on me after about 10 minutes of driving after work. Acted kinda like I ran out of gas but wen I tried to turn it over it cranks but does not fire. I know I'm getting fuel I hear the pump prime and my fuel pressure gauge shows a reading. I'm not getting spark I've replaced the tfi module the cap and rotor and reinstalled my stock coil but still no spark. What's next? Any suggestions? Thanks in advance guys

gripthenboost · January 16th, 2012, 04:14 PM

Distributor or your coil, You can but a new module for the distributor and new coil from autozone. Thats the two bigest pain in the asses.

gripthenboost · January 16th, 2012, 04:16 PM

I had that same problem. Its was my dizzy car felt like it ran outta gas.

ReverendDexter · January 16th, 2012, 04:17 PM

Does it fire when cold? That'd tell me it's definitely an connectivity problem as conductivity decreases with heat (which is why superconductors are almost always liquid helium cooled).

When I had that issue (run fine cold, not even start when hot), it was my coil.

Check your fuses, fusable links, and all grounds. Work your way through the free and cheap stuff before you start replacing the more expensive parts.

jays90foxbody · January 16th, 2012, 04:29 PM

My stock coil worked when I pulled it so that's why I used it to rule out the coil. When it died I wouldn't really say it was hot or even warm it was a cold night after I got off work. Would the distributor craping out act like that just shutting off?

gripthenboost · January 16th, 2012, 04:33 PM

when the dizzy goes dead it would act like your running out of fuel because your losing spark. That happened to me

ReverendDexter · January 16th, 2012, 04:35 PM

Well, for the dizzy to do it, it would have to be the contact from the coil to the rotor, or the rotor itself. Being that it's not a single or multiple cylinder miss, for everything to crap out means it's somewhere where all the cylinders share a common path, which means either upstream of the dizzy, or downstream of the plugs.

jays90foxbody · January 16th, 2012, 05:11 PM

Maybe the sensor inside the dizzy? Is it worth it to try and replace that sensor I believe it's called a stator sensor? Or just try a new dizzy? My ford racing coil that was on there looked like it split at the seem and drained some kinda lubricant? But the connector to the coil does have power to it.

ryanw · January 16th, 2012, 05:22 PM

If your coil is leaking, then its no good.

I think in the hanes manual, it shows you how to ohm out the coil. I think the stock coil is some thing like 50 ohms. Dont quote me on that.....

jays90foxbody · January 16th, 2012, 10:26 PM

I'm Gunna try and swap the dizzy. Any advice or tips on removing/reinstalling the dizzy so I don't F that up?

nolife · January 17th, 2012, 12:47 AM

Before throwing parts on..
Cranks OK, but No Start Checklist for Fuel Injected Mustangs | Mustang Forums at StangNet

If you go the dizzy route, mark the position of the rotor in relation to the dizzy base before pulling it out and don't turn the engine over while the dizzy is out. Also note the rough clocked position of the whole dizzy as well (angle/direction the TFI module is pointing). With those, you can get to within a few degrees with just your eyes when you put it all back in. Don't drop anything in the hole while the dizzy is out. It really sucks when that happens.

jays90foxbody · January 17th, 2012, 01:47 PM

Is there any way for me to check/test the dizzy?

jays90foxbody · January 17th, 2012, 04:57 PM

So I went and rented some noid lights from autozone but not quite sure I'm useing them right. I pulled the plug going to the injector harness and none of the lights fit into the female side of harness(the side going to the injectors) so I held the closest one that would fit in and try'd turning it over nothing. Did I perform the test correctly or am I just a dumbass?

nolife · January 17th, 2012, 07:17 PM

Originally Posted by jays90foxbody

So I went and rented some noid lights from autozone but not quite sure I'm useing them right. I pulled the plug going to the injector harness and none of the lights fit into the female side of harness(the side going to the injectors) so I held the closest one that would fit in and try'd turning it over nothing. Did I perform the test correctly or am I just a dumbass?

Unplug a single injector and plug/tap the noid light into that harness plug (not the injector).

jays90foxbody · January 17th, 2012, 09:19 PM

I will try that in the mourning. I pulled an injector plug though and the ford noid light didn't fit that either but I'll try and make it work without messing anything else up

FastStang91Lx · January 17th, 2012, 09:29 PM

Morning = next day in the AM
Mourning = what you'll be doing when it doesn't work

jays90foxbody · January 18th, 2012, 02:11 AM

Wow not only can you get advice on ur mustang at MM but spelling and grammar as well it's the total package here people

FastStang91Lx · January 18th, 2012, 04:33 AM

Sorry, just found the perfect opportunity for a pun. At least you didn't take offense!

jays90foxbody · January 18th, 2012, 03:04 PM

Lifes to short to sweat the little things faststang91lx. So I try'd the test over again with the noid light plugged into one of the injector plugs and I did see the light illuminate faintly but not everytime? So does that mean the dizzy is working? What's the next spot to test or look at?

jays90foxbody · January 18th, 2012, 05:02 PM

Retried the noid light test again with someone behind the wheel cranking it. light flickered once briefly on the first try then not again untill the key was turned off it flickered again briefly? I'm lost I still think it's the dizzy but if it were how'd the noid light work. Retested the crap out of the coil there's definatly power coming in and going out. Any ideas/thoughts?

January 16th, 2012, 03:53 PM	#1
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	1990 mustang GT not getting spark please help The other night my 90 GT died on me after about 10 minutes of driving after work. Acted kinda like I ran out of gas but wen I tried to turn it over it cranks but does not fire. I know I'm getting fuel I hear the pump prime and my fuel pressure gauge shows a reading. I'm not getting spark I've replaced the tfi module the cap and rotor and reinstalled my stock coil but still no spark. What's next? Any suggestions? Thanks in advance guys __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 16th, 2012, 04:14 PM	#2
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	Distributor or your coil, You can but a new module for the distributor and new coil from autozone. Thats the two bigest pain in the asses. __________________

January 16th, 2012, 04:16 PM	#3
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	I had that same problem. Its was my dizzy car felt like it ran outta gas. __________________

January 16th, 2012, 04:17 PM	#4
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	Does it fire when cold? That'd tell me it's definitely an connectivity problem as conductivity decreases with heat (which is why superconductors are almost always liquid helium cooled). When I had that issue (run fine cold, not even start when hot), it was my coil. Check your fuses, fusable links, and all grounds. Work your way through the free and cheap stuff before you start replacing the more expensive parts. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

January 16th, 2012, 04:29 PM	#5
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	My stock coil worked when I pulled it so that's why I used it to rule out the coil. When it died I wouldn't really say it was hot or even warm it was a cold night after I got off work. Would the distributor craping out act like that just shutting off? __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 16th, 2012, 04:33 PM	#6
gripthenboost Hardcore Enthusiast 91 Mustang GT 1991 sliver GT Join Date: Apr 2010 Location: New York Posts: 1,213 iTrader: 0 reviews	when the dizzy goes dead it would act like your running out of fuel because your losing spark. That happened to me __________________

January 16th, 2012, 04:35 PM	#7
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	Well, for the dizzy to do it, it would have to be the contact from the coil to the rotor, or the rotor itself. Being that it's not a single or multiple cylinder miss, for everything to crap out means it's somewhere where all the cylinders share a common path, which means either upstream of the dizzy, or downstream of the plugs. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

January 16th, 2012, 05:11 PM	#8
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	Maybe the sensor inside the dizzy? Is it worth it to try and replace that sensor I believe it's called a stator sensor? Or just try a new dizzy? My ford racing coil that was on there looked like it split at the seem and drained some kinda lubricant? But the connector to the coil does have power to it. __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 16th, 2012, 05:22 PM	#9
ryanw I Post Entirely Way Too Much 1991 Ford Mustang GT Join Date: May 2007 Location: San Diego, California Posts: 6,063 iTrader: 0 reviews	If your coil is leaking, then its no good. I think in the hanes manual, it shows you how to ohm out the coil. I think the stock coil is some thing like 50 ohms. Dont quote me on that..... __________________ DART 331ci stroker, AFR 185 heads, Trick Flow R intake, Accufab 70mm tb, 75mm pro m Maf, 30lb injectors, jba headers, 2 1/2" x pipe flowmaster super 10 mufflers, 255 fuel pump, 3:27 gears

January 16th, 2012, 10:26 PM	#10
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	I'm Gunna try and swap the dizzy. Any advice or tips on removing/reinstalling the dizzy so I don't F that up? __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 17th, 2012, 12:47 AM	#11
nolife MM Fanatic 91GT, 88GT, 02GT Join Date: Dec 2006 Posts: 3,057 Blog Entries: 3 iTrader: 0 reviews	Before throwing parts on.. Cranks OK, but No Start Checklist for Fuel Injected Mustangs \| Mustang Forums at StangNet If you go the dizzy route, mark the position of the rotor in relation to the dizzy base before pulling it out and don't turn the engine over while the dizzy is out. Also note the rough clocked position of the whole dizzy as well (angle/direction the TFI module is pointing). With those, you can get to within a few degrees with just your eyes when you put it all back in. Don't drop anything in the hole while the dizzy is out. It really sucks when that happens. __________________

January 17th, 2012, 01:47 PM	#12
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	Is there any way for me to check/test the dizzy? __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 17th, 2012, 04:57 PM	#13
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	So I went and rented some noid lights from autozone but not quite sure I'm useing them right. I pulled the plug going to the injector harness and none of the lights fit into the female side of harness(the side going to the injectors) so I held the closest one that would fit in and try'd turning it over nothing. Did I perform the test correctly or am I just a dumbass? __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 17th, 2012, 09:19 PM	#15
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	I will try that in the mourning. I pulled an injector plug though and the ford noid light didn't fit that either but I'll try and make it work without messing anything else up __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 17th, 2012, 09:29 PM	#16
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Morning = next day in the AM Mourning = what you'll be doing when it doesn't work __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

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January 18th, 2012, 02:11 AM	#17
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	Wow not only can you get advice on ur mustang at MM but spelling and grammar as well it's the total package here people __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 18th, 2012, 04:33 AM	#18
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Sorry, just found the perfect opportunity for a pun. At least you didn't take offense! __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

January 18th, 2012, 03:04 PM	#19
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	Lifes to short to sweat the little things faststang91lx. So I try'd the test over again with the noid light plugged into one of the injector plugs and I did see the light illuminate faintly but not everytime? So does that mean the dizzy is working? What's the next spot to test or look at? __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

January 18th, 2012, 05:02 PM	#20
jays90foxbody Newbie 1990 Mustang GT Join Date: Dec 2011 Location: San Diego Posts: 32 iTrader: 0 reviews	Retried the noid light test again with someone behind the wheel cranking it. light flickered once briefly on the first try then not again untill the key was turned off it flickered again briefly? I'm lost I still think it's the dizzy but if it were how'd the noid light work. Retested the crap out of the coil there's definatly power coming in and going out. Any ideas/thoughts? __________________ 1990 Mustang Gt 306, Trick Flow street burner intake, 70mm T/B, CAI, Compcam XE266hr cam, Crane Cam 1.7 roller rockers, 3.55s, JBA shorties, ...soon to be painted and upgraded

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