Car won't start. Long.

83GTMUSTANG · 07-11-2005, 10:18 AM

I Had A Crane Hi-6s Gave Me Hell It Would Drive A Block Or Two Then Cut Off But The Light Would Still Be On,,,,,,,,,,so I Swiched To Msd 6al Box 1 Year Not 1 Problem Sofar.........check The Wires Or Go Back To Your Factory Stuff...........good Luck

NitroNixon · 07-11-2005, 10:25 AM

I will definitely look into this.

Ian Gorman · 07-11-2005, 12:00 PM

Do you know if the fuel pressure is staying up once the car is running? You may have enough pressure for idle but once you put a load on the system the pressure could be dropping, causing the stalls. Have you checked to see if the fuel pump relay is getting hot? It shouldn't. I've have had similar symptoms but have been told that my fule pump has developed an internal ground and is about to be replaced. Have the relay checked out, the extra draw from a failing pump burns them up pretty quickly. I replaced two within 3,000 miles before I realized what was going on.

NitroNixon · 07-11-2005, 01:31 PM

I haven't had a chance to check my feul pressure gauge while the engine was running. But when I initially turn the key, I can hear the buzzing from the pump and the fuel pressure rises to around 32psi.

Where is the feul pump relay located?

I have an 87 GT Hatchback.

Ian Gorman · 07-11-2005, 01:51 PM

I think on an 87 it is under the driver's seat. It is mounted to the metal boltdown bracket right under the middle of the seat. Just take out the bolt and gently pull the whole assembly forward. When I remounted mine I did not tighten everything up so that when it went out again I could replace thye relay without using any tools.

Did you use a timing light when you were checking for spark? You seem pretty convinced that spark was the problem and I must admit that originally a bad coil had crossed my mind but the electricals checked out OK.

NitroNixon · 07-11-2005, 03:09 PM

I couldn't use a timing light because I didn't have one available since I was stranded on the side of the beltway. Also I can even get the engine started long engine to use the timing light.

I'll check the relay though.

Thanks

Hozer 88GTConv · 07-11-2005, 03:34 PM

I would definitely start at that box, where's it located? Under the hood? Sounds possibly like an electrical heat sink issue, that is as a component heats up it becomes less effective at producing/managing spark. That's why the tfi module is in the stupidest place ever.
Take the box out of the loop...
good luck...

07-11-2005, 10:18 AM	#1
83GTMUSTANG N-V-ME Join Date: May 2005 Location: SOUTHFIELD,MICHIGAN Posts: 155	Re: Car won't start. Long. I Had A Crane Hi-6s Gave Me Hell It Would Drive A Block Or Two Then Cut Off But The Light Would Still Be On,,,,,,,,,,so I Swiched To Msd 6al Box 1 Year Not 1 Problem Sofar.........check The Wires Or Go Back To Your Factory Stuff...........good Luck __________________ 88' LX MUSTANG: LINCOLN ROTORS , AIR SUSPENSION FRONT AND REAR, SUBFRAMES, ROLL CAGE, 92' BLOCK, MSD 6AL, ACCEL 8.8 WIRES, ACCEL COIL, EDELBROCK F4B INTAKE (PORTED),2 IN. 4 HOLE SPACERS, HOLLEY 600 CARB.,HOLLEY BLUE FUEL PUMP AN REGULATOR, E 303 (.498 IN. 220 DUR.) CAM, (.535 IN. OF LIFT W/ 1.72 SCORPIN ROLLER ROCKERS), PORTED E7'S, FLOWTECH 1 5/8 LONG TUBE HEADERS, 2 1/2 IN. H PIPE, 2 CHAMBER FLOWMASTERS WITH 3 IN.DUMPS, T-5, 3.73 GEARS, 5 LUG AEROSTAR AXELS, 245-45-17 96' COBRA WHEELS

07-11-2005, 10:25 AM	#2
NitroNixon Registered Member Join Date: Mar 2002 Location: DC Posts: 129	Re: Car won't start. Long. I will definitely look into this. __________________ 87 GT As of 2/1/06 650 DP Carb Crosswind Intake Edelbrock Performer Heads 97 Explorer Bottomend w/ B-303 Cam 1.7 Roller Rockers Flowtech Longtube Headers Flowtech H-Pipe MSD Black Wires MSD ignition MSD Distributor Blaster 3 Coil Electric Fan Underdrive Pullies T5 Trans Hurst Shifter Lowered 1.5" 373 Gears

07-11-2005, 12:00 PM	#3
Ian Gorman Registered Member Join Date: Feb 2002 Location: Houston Posts: 5	Re: Car won't start. Long. Do you know if the fuel pressure is staying up once the car is running? You may have enough pressure for idle but once you put a load on the system the pressure could be dropping, causing the stalls. Have you checked to see if the fuel pump relay is getting hot? It shouldn't. I've have had similar symptoms but have been told that my fule pump has developed an internal ground and is about to be replaced. Have the relay checked out, the extra draw from a failing pump burns them up pretty quickly. I replaced two within 3,000 miles before I realized what was going on.

07-11-2005, 01:31 PM	#4
NitroNixon Registered Member Join Date: Mar 2002 Location: DC Posts: 129	Re: Car won't start. Long. I haven't had a chance to check my feul pressure gauge while the engine was running. But when I initially turn the key, I can hear the buzzing from the pump and the fuel pressure rises to around 32psi. Where is the feul pump relay located? I have an 87 GT Hatchback. __________________ 87 GT As of 2/1/06 650 DP Carb Crosswind Intake Edelbrock Performer Heads 97 Explorer Bottomend w/ B-303 Cam 1.7 Roller Rockers Flowtech Longtube Headers Flowtech H-Pipe MSD Black Wires MSD ignition MSD Distributor Blaster 3 Coil Electric Fan Underdrive Pullies T5 Trans Hurst Shifter Lowered 1.5" 373 Gears

07-11-2005, 01:51 PM	#5
Ian Gorman Registered Member Join Date: Feb 2002 Location: Houston Posts: 5	Re: Car won't start. Long. I think on an 87 it is under the driver's seat. It is mounted to the metal boltdown bracket right under the middle of the seat. Just take out the bolt and gently pull the whole assembly forward. When I remounted mine I did not tighten everything up so that when it went out again I could replace thye relay without using any tools. Did you use a timing light when you were checking for spark? You seem pretty convinced that spark was the problem and I must admit that originally a bad coil had crossed my mind but the electricals checked out OK.

07-11-2005, 03:09 PM	#6
NitroNixon Registered Member Join Date: Mar 2002 Location: DC Posts: 129	Re: Car won't start. Long. I couldn't use a timing light because I didn't have one available since I was stranded on the side of the beltway. Also I can even get the engine started long engine to use the timing light. I'll check the relay though. Thanks __________________ 87 GT As of 2/1/06 650 DP Carb Crosswind Intake Edelbrock Performer Heads 97 Explorer Bottomend w/ B-303 Cam 1.7 Roller Rockers Flowtech Longtube Headers Flowtech H-Pipe MSD Black Wires MSD ignition MSD Distributor Blaster 3 Coil Electric Fan Underdrive Pullies T5 Trans Hurst Shifter Lowered 1.5" 373 Gears

07-11-2005, 03:34 PM	#7
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Re: Car won't start. Long. I would definitely start at that box, where's it located? Under the hood? Sounds possibly like an electrical heat sink issue, that is as a component heats up it becomes less effective at producing/managing spark. That's why the tfi module is in the stupidest place ever. Take the box out of the loop... good luck... __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

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