1982 Crossfire Injection
Thread Starter
2nd Gear
Joined: Jan 2006
Posts: 2
Likes: 0
1982 Crossfire Injection
We have an 82 Silver Anniversary Model with Crossfire Injection, new fuel pump, fuel pump relay and fuel filter. With the key on, we are showing voltage to the pump but still am not getting any fuel. Any ideas??
Drifting
Joined: Sep 2004
Posts: 1,270
Likes: 4
From: Celeste Texas
1. Put some extra fuel in the tank.
2. Look for crimped lines.
3. Do you get fuel to the TB's
I can't find it right now but somewhere I have the wiring diagram for the fuel system. Send me your e-mail and I'll send it to you when I find it.
Bill
2. Look for crimped lines.
3. Do you get fuel to the TB's
I can't find it right now but somewhere I have the wiring diagram for the fuel system. Send me your e-mail and I'll send it to you when I find it.
Bill
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
Check the 2 injector fuses. Is the fuel filter clean? Is your oil pressure switch functional? If it doesn't sense minimum 5 psi oil pressure the computer shuts down the fuel pump. Take the air cleaner off. Are the injectors spraying or dripping? follow the injector wirint to the box on the firewall..passengerside...open the box...hows the connection. These are all the simple things it could be.
If you are really stuck go to http://www.crossfire.homeip.net/ site is dedicated to Crossfires. They will know how to resolve your problem(s).
Jim
If you are really stuck go to http://www.crossfire.homeip.net/ site is dedicated to Crossfires. They will know how to resolve your problem(s).
Jim
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
do you hear the relay? It delivers power to the pump when you turn the key on and during cranking, after that when you have oil pressure the oil pressure switch makes the 12V connection for the pump (and the relay is shut down). Turn the key to the ign. pos. and listen if the pump runs. If not, either the relay is dead, the pump is dead, the ECM isn't switching the pump on or a fuse is blown. Check that first and if it's a no go please report back. Here's the fusebox..the scripting is probably gone and that makes identifying the correct fuses a PITA.
Thread Starter
2nd Gear
Joined: Jan 2006
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Thanks for suggestions
Tex, We don't even get fuel to the filter with the line disconnected and the switch on. Have about 8 gals of fuel in tank, I would think that should be plenty of fuel.
JP, with a little starting fluid the engine starts, but no fuel at all to the TBs, but with no fuel with just the key on, how would that happen in the first place. The interlocks, oil switch, should come into play after the engine has started correct? Thanks for the link, I will check it out.
Twin, don't hear the relay or the pump when the ignition switch is on. We checked the fuse to the FP and it is good, did not check the other fuses you have highlighted in blue. The engine cranks and will run if we use starting fluid or a put a little fuel in the TBs. How would I check to see if the ECM is sending a run signal to the pump?
Question, as the fuel system has a return to the tank, will the fuel pump run continuously if the ignition switch is on? Or will it shut off after some time period or if pressure builds up? It's a relatively low pressure system isn't it, less then 20 psi?
Thanks for all the information everyone, it gives me a starting point.
JP, with a little starting fluid the engine starts, but no fuel at all to the TBs, but with no fuel with just the key on, how would that happen in the first place. The interlocks, oil switch, should come into play after the engine has started correct? Thanks for the link, I will check it out.
Twin, don't hear the relay or the pump when the ignition switch is on. We checked the fuse to the FP and it is good, did not check the other fuses you have highlighted in blue. The engine cranks and will run if we use starting fluid or a put a little fuel in the TBs. How would I check to see if the ECM is sending a run signal to the pump?
Question, as the fuel system has a return to the tank, will the fuel pump run continuously if the ignition switch is on? Or will it shut off after some time period or if pressure builds up? It's a relatively low pressure system isn't it, less then 20 psi?
Thanks for all the information everyone, it gives me a starting point.
Le Mans Master
Joined: Oct 2001
Posts: 6,798
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From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
Originally Posted by dmett41691
We have an 82 Silver Anniversary Model with Crossfire Injection, new fuel pump, fuel pump relay and fuel filter. With the key on, we are showing voltage to the pump but still am not getting any fuel. Any ideas??
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Race Director
Joined: Dec 1999
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Originally Posted by dmett41691
Tex, We don't even get fuel to the filter with the line disconnected and the switch on. Have about 8 gals of fuel in tank, I would think that should be plenty of fuel.
JP, with a little starting fluid the engine starts, but no fuel at all to the TBs, but with no fuel with just the key on, how would that happen in the first place. The interlocks, oil switch, should come into play after the engine has started correct? Thanks for the link, I will check it out.
Twin, don't hear the relay or the pump when the ignition switch is on. We checked the fuse to the FP and it is good, did not check the other fuses you have highlighted in blue. The engine cranks and will run if we use starting fluid or a put a little fuel in the TBs. How would I check to see if the ECM is sending a run signal to the pump?
Question, as the fuel system has a return to the tank, will the fuel pump run continuously if the ignition switch is on? Or will it shut off after some time period or if pressure builds up? It's a relatively low pressure system isn't it, less then 20 psi?
Thanks for all the information everyone, it gives me a starting point.
JP, with a little starting fluid the engine starts, but no fuel at all to the TBs, but with no fuel with just the key on, how would that happen in the first place. The interlocks, oil switch, should come into play after the engine has started correct? Thanks for the link, I will check it out.
Twin, don't hear the relay or the pump when the ignition switch is on. We checked the fuse to the FP and it is good, did not check the other fuses you have highlighted in blue. The engine cranks and will run if we use starting fluid or a put a little fuel in the TBs. How would I check to see if the ECM is sending a run signal to the pump?
Question, as the fuel system has a return to the tank, will the fuel pump run continuously if the ignition switch is on? Or will it shut off after some time period or if pressure builds up? It's a relatively low pressure system isn't it, less then 20 psi?
Thanks for all the information everyone, it gives me a starting point.
The fuel pump will only run for a couple of secs when you turn the ign. on, it will shut down only to start again during cranking. If you turn the ign. on and off again and then on the pump won't run either, there's a timer and it takes about 30 secs until it will prime again w/ ign. on. The pressure is 10-14psi.
If you can start the car w/ starter fluid the oil press. switch should close and allow the car to run so it may be the fuel pump or fuel pump fuse.
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Last edited by Twin_Turbo; Jan 22, 2006 at 06:11 AM.
Burning Brakes
Joined: Aug 2004
Posts: 971
Likes: 7
From: roanoke va
If you have 12.0+ volts at the fuel pump when you turn the key on suspect the fuel pump. If it is an after market pump I would really suspect the pump. I have seen many troubles with after market in tank pumps.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
I'm not 100% sure. The fuel pump will not send fuel unless the oil pressure switch senses minimum 5 psi. It comes into play first when you crank the engine. it also comes into play if the engine is running and the fuel pressure drops below 5 psi...it will stop the fuel supply.
When you crank the engine does the oil pressure build up to over 5 psi? If not it will not start.
Jim
When you crank the engine does the oil pressure build up to over 5 psi? If not it will not start.
Jim
Race Director
Joined: Dec 1999
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Yes, that is true, the relay is only for priming the system and delivering fuel during cranking, when the engine is running and there is adequate oil presssure then the relay doesn't have anything to do with it, the oil pressure switch handles the power. The oil press switch doubles as a safety device in case oil pressure is lost.
If the problem was the oil press. switch then the engine would run briefly or at least attmept to start after the relay has primed the system. There's an easy check, just ground the Fuel Pump relay pinout on the ALDL, that will force the relay on and the engine would be able to run with the relay powering the fuel pump, in that case the problem would be the pressure switch.
If the problem was the oil press. switch then the engine would run briefly or at least attmept to start after the relay has primed the system. There's an easy check, just ground the Fuel Pump relay pinout on the ALDL, that will force the relay on and the engine would be able to run with the relay powering the fuel pump, in that case the problem would be the pressure switch.
Last edited by Twin_Turbo; Jan 24, 2006 at 12:30 PM.
5th Gear
Joined: Aug 2005
Posts: 5
Likes: 0
on my 82 which stopped running on the way home from church... tere was a tube between the pickup screen and the electric pump, it had disentegrated and wasn't hooked to the pump. I replaced it with a piece of fuel line and walaa the engine started riight up and maintained fuel pressure
