Ecu question involving spark and fuel
#1
Ecu question involving spark and fuel
hey guys i was just wondering if i could of fried my ecu while taking it out awhile back and that is why it wont get spark or tell the fuel pump to turn on when i turn the key. i checked the fuel pump and it only runs with a seperate power source and i also checked the spark and no spark ( i put a screw driver in the boot touching the metal and put the screw driver touching the mounts for the A/C bracket ). I heard it is very uncommon for the coil packs to malfunction or cause problems, but i could be wrong. So would my best bet be to buy a used ecu ? By the way it is a 1987 N/a . any help would be great.
#3
Moderator
iTrader: (1)
Your fuel problem might be due to your circuit opening relay. You could also test your ECU to see if it is sending proper voltage to your injectors as well as to check if they are pulsing properly.
https://www.rx7club.com/showthread.p...+opening+relay
Read post #12 https://www.rx7club.com/showthread.p...=starter+relay
https://www.rx7club.com/showthread.p...+opening+relay
https://www.rx7club.com/showthread.p...+opening+relay
Read post #12 https://www.rx7club.com/showthread.p...=starter+relay
https://www.rx7club.com/showthread.p...+opening+relay
#4
i tried jumping the connector and **** , like everything worked before i removed the ecu ( like the spark and fuel ) , but now it wont, i checked that everything was in place and connected. Would disconnecting the ecu while the battery is still plugged in affect it ? i know i made that mistake once. People here said it is very rare the relay would be the problem
#7
Sequentially broken
Check for voltage on the B/Y wire at the coils, and also check the B/W wire at the circuit opening relay. Check fuses and make sure the main relay's working as it should.
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trickster
2nd Generation Specific (1986-1992)
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07-01-23 04:40 PM