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The Terminator
Engine/Tuning
FPDM Thermal Overload
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<blockquote data-quote="Coderedsaleen" data-source="post: 9207422" data-attributes="member: 83322"><p>List of change over / modifications:</p><p></p><p>1. 03 Cobra engine.</p><p>2. Using all 01 factory wiring harnesses, PCM, and Cluster.</p><p>3. Changed polarity on the COP.</p><p>4. Changed fuel tank w/pumps to 03 Cobra.</p><p>5. Wired FPDM the same as it would be on a 03 Cobra (Dual DG/YW wires from the CCRM for the FPDM signal wire).</p><p>6. Wired dual wires to the fuel pumps just like a 03 Cobra. (Dual positive and negative to send more voltage/amps (Upgrade)).</p><p>7. I have wired a relay to provide constant battery power to the FPDM, switched by the CCRM to activate the relay. Same as in the dual FPDM set up but only with one FPDM.</p><p>8. I have tried two different FPDM, original 01 and the 03, with the same effects.</p><p>9. Data logging I get 100% duty cycle, pumps maxed out. The voltage is 12.9 or lower. This is at idle or driving it. </p><p>10. Line 9 is why I did line 7. I have 12.5 - 13.7 now coming from the battery to the FPDM depending on state of the alternator.</p><p>11. Alternator voltage is reading 13.7 down to 12.5 at the battery, Should the voltage be reading higher, say around 13.9 constant? I was going to get a new alternator but the auto parts store has the 110 amp, should I be looking at getting a 130 amp? Which one it the original amps, 110 or 130?</p><p></p><p>Could I have one bad fuel pump? I know that when I turn the key on I hear the CCRM click but not the pumps, and fuel pressure is not showing on the electrical gauge I have installed. I turn the key on and off a couple of times and then try to start it, the car will start up and run. I have about 20-25 PSI fuel pressure while it is running. After it has been running for about 5 min the FPDM with heat up and start to go into thermal overload. This shuts the pumps off and on, I can see the pressure drop and rise when it does this.</p><p></p><p>So the only problems now are why does the FPDM go into thermal overload, weak fuel pressure and do I have a bad pump or pumps? </p><p></p><p>:shrug:</p></blockquote><p></p>
[QUOTE="Coderedsaleen, post: 9207422, member: 83322"] List of change over / modifications: 1. 03 Cobra engine. 2. Using all 01 factory wiring harnesses, PCM, and Cluster. 3. Changed polarity on the COP. 4. Changed fuel tank w/pumps to 03 Cobra. 5. Wired FPDM the same as it would be on a 03 Cobra (Dual DG/YW wires from the CCRM for the FPDM signal wire). 6. Wired dual wires to the fuel pumps just like a 03 Cobra. (Dual positive and negative to send more voltage/amps (Upgrade)). 7. I have wired a relay to provide constant battery power to the FPDM, switched by the CCRM to activate the relay. Same as in the dual FPDM set up but only with one FPDM. 8. I have tried two different FPDM, original 01 and the 03, with the same effects. 9. Data logging I get 100% duty cycle, pumps maxed out. The voltage is 12.9 or lower. This is at idle or driving it. 10. Line 9 is why I did line 7. I have 12.5 - 13.7 now coming from the battery to the FPDM depending on state of the alternator. 11. Alternator voltage is reading 13.7 down to 12.5 at the battery, Should the voltage be reading higher, say around 13.9 constant? I was going to get a new alternator but the auto parts store has the 110 amp, should I be looking at getting a 130 amp? Which one it the original amps, 110 or 130? Could I have one bad fuel pump? I know that when I turn the key on I hear the CCRM click but not the pumps, and fuel pressure is not showing on the electrical gauge I have installed. I turn the key on and off a couple of times and then try to start it, the car will start up and run. I have about 20-25 PSI fuel pressure while it is running. After it has been running for about 5 min the FPDM with heat up and start to go into thermal overload. This shuts the pumps off and on, I can see the pressure drop and rise when it does this. So the only problems now are why does the FPDM go into thermal overload, weak fuel pressure and do I have a bad pump or pumps? :shrug: [/QUOTE]
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