No spark or fuel

Semper_Fi · 05-30-2011, 02:42 AM

Just finished rebuilding the 7mgte. I havent been able to get the fuel and spark problem resolved yet. So im turning for help from the supra forum. I baught a brand new ecu and new wire harness, new cps, and new ignitor. Im somehow not getting power to the fuse box, and wen I do manage by jumping the fusrbox, the car still doesnt get fuel or spark. Can I get help. Thanks supra forum. Carlos

Ps... Were is the fmi???

Excuse my short, shitty post. Im on my cell and my english is shitty. Thanks again.

El Supracabras · 05-30-2011, 12:05 PM

Holy gazillion dollars!! I don't even want to know how much all those NEW parts set you back.
Which fuse box are you talking about? The one under the hood is fed directly from the battery positive terminal by an 8 gauge(ish) wire. Does anything in that fuse box have 12V at all? Ive had to repair this wire on several old supras due to corrosion, accidents, mechanics who poorly replace the battery terminal, terrible wiring repairs,etc.
When you say no fuel, do you mean no pump operation or no injector pulse?

Semper_Fi · 05-30-2011, 06:32 PM

Quote:

Originally Posted by El Supracabras

Holy gazillion dollars!! I don't even want to know how much all those NEW parts set you back.
Which fuse box are you talking about? The one under the hood is fed directly from the battery positive terminal by an 8 gauge(ish) wire. Does anything in that fuse box have 12V at all? Ive had to repair this wire on several old supras due to corrosion, accidents, mechanics who poorly replace the battery terminal, terrible wiring repairs,etc.
When you say no fuel, do you mean no pump operation or no injector pulse?

Im not getting any fuel when I try to crank the car, I pull the spark plugs after each failed atempt to turn on, and I dont smell any fuel on plugs. And wen I pull the plug and crANK the car, I pull the plug out,and ground it and no spark... 500 dollars more into this car and ima have to cut my losses. The car is scheduled for a body shop, and a 700$ cf hood. I really hope I can,have her running. Please help

El Supracabras · 05-30-2011, 08:38 PM

I assume you've made sure the supply wire to the fuse box is in excellent condition. Have you double checked all your grounds? The two under the intake by the brake booster are very important for the ecu. Do you have fuel pressure?? You need to figure out if the fuel pump is not turning on or if the ecu is not firing the injectors. This will tell you where to look next. Check the cps wiring again. It gives information to the ecu for both spark and fuel. Use the tsrm diagram for reference if you need to. You need a multimeter or at least test lamp to trace power to and from the main relay, ecu, etc. etc... It shouldn't cost you any money to figure out whats not working, just time and patience... and a multimeter. Good luck.

Semper_Fi · 05-30-2011, 09:53 PM

Quote:

Originally Posted by El Supracabras

I assume you've made sure the supply wire to the fuse box is in excellent condition. Have you double checked all your grounds? The two under the intake by the brake booster are very important for the ecu. Do you have fuel pressure?? You need to figure out if the fuel pump is not turning on or if the ecu is not firing the injectors. This will tell you where to look next. Check the cps wiring again. It gives information to the ecu for both spark and fuel. Use the tsrm diagram for reference if you need to. You need a multimeter or at least test lamp to trace power to and from the main relay, ecu, etc. etc... It shouldn't cost you any money to figure out whats not working, just time and patience... and a multimeter. Good luck.

Wow... How did I overlook the 2 grounds under the intake manifold. Hey man. I really could use as much as possible with the car. This supra is more complicated then the blackhawks I worked on daily for the past 6 months. My number is 4073509099. If u could text me so I could get more help I would be very thankful. Thanks again. Carlos

Semper_Fi · 06-01-2011, 07:31 PM

Quote:

Originally Posted by Semper_Fi

Wow... How did I overlook the 2 grounds under the intake manifold. Hey man. I really could use as much as possible with the car. This supra is more complicated then the blackhawks I worked on daily for the past 6 months. My number is 4073509099. If u could text me so I could get more help I would be very thankful. Thanks again. Carlos

Bump!!! I need help with this car... My halfcage, seats, and steering wheel came in

05-30-2011, 02:42 AM	#1
Semper_Fi 3" Exhaust Join Date: Apr 2010 Location: Kissimmee, FL Posts: 72	No spark or fuel Just finished rebuilding the 7mgte. I havent been able to get the fuel and spark problem resolved yet. So im turning for help from the supra forum. I baught a brand new ecu and new wire harness, new cps, and new ignitor. Im somehow not getting power to the fuse box, and wen I do manage by jumping the fusrbox, the car still doesnt get fuel or spark. Can I get help. Thanks supra forum. Carlos Ps... Were is the fmi??? Excuse my short, shitty post. Im on my cell and my english is shitty. Thanks again. __________________ 1989 supra turbo- uh-60 blackhawk... My life

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05-30-2011, 12:05 PM	#2
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	Holy gazillion dollars!! I don't even want to know how much all those NEW parts set you back. Which fuse box are you talking about? The one under the hood is fed directly from the battery positive terminal by an 8 gauge(ish) wire. Does anything in that fuse box have 12V at all? Ive had to repair this wire on several old supras due to corrosion, accidents, mechanics who poorly replace the battery terminal, terrible wiring repairs,etc. When you say no fuel, do you mean no pump operation or no injector pulse?

05-30-2011, 08:38 PM	#4
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	I assume you've made sure the supply wire to the fuse box is in excellent condition. Have you double checked all your grounds? The two under the intake by the brake booster are very important for the ecu. Do you have fuel pressure?? You need to figure out if the fuel pump is not turning on or if the ecu is not firing the injectors. This will tell you where to look next. Check the cps wiring again. It gives information to the ecu for both spark and fuel. Use the tsrm diagram for reference if you need to. You need a multimeter or at least test lamp to trace power to and from the main relay, ecu, etc. etc... It shouldn't cost you any money to figure out whats not working, just time and patience... and a multimeter. Good luck.