i need some ideas to fix my mpfi swap

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Old Oct 30, 2010 | 12:10 PM
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efjones9's Avatar
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Default i need some ideas to fix my mpfi swap

so i cant figure what it is. this is what ive done....

d15b1 block z6 head, a6 dizzy modified for a z6 head, mpfi conversion. obd0 injectors with inj. box and pr4 ecu. soldered the yel/blk wires together and wired that to the yel blk wires on the inj. box. wired the injectors individually to the ecu. swapped c1 and c2 to b10 b12 ran the wires from the dizzy to c1 c2. extended tps and aicv. swapped the wires on the tps. checked fuses

The problem

i go to start the car. 1st noticeable thing is that the main relay doesnt click at all and i dont hear the fuel pump prime. so i dont bother cranking it. then i look @ the ecu and it doesnt blink or give any indication that its gettting power.

Question
can anyone see what ive done wrong just from the list that i made? any suggestions/tips/tricks? thanx

Last edited by efjones9; Oct 31, 2010 at 12:14 PM.
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Old Oct 30, 2010 | 02:39 PM
  #2  
jdm ef8 89's Avatar
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Default Re: i need some ideas to fix my mpfi swap

Well i had almost the same problem I switched to mpfi did the wiring right and the main relay wasnt priming my fuel pump. So i tested my main relay (haynes manual) no continuety so i looked at it and the connections were cracked so all i did was solder the connections( just pushed the solder around) put it back in clicked (super loud) primed fuel pump and fired 1st try and stays on, no problems since.
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Old Oct 30, 2010 | 05:17 PM
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Default Re: i need some ideas to fix my mpfi swap

if you turn the key on and your cel doesnt come on then its your ecu, if the cel comes on and stays on its your main relay, easiest way to know but sometimes it wont stay on, if it does count the flashes, get rid of the resistor box it complicates things just solder the 2 yellow blacks to your injector power wires, then change your injectors to obd1 style non resistor or get some obd2 injectors and clips look alot nicer
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Old Oct 30, 2010 | 05:19 PM
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Default Re: i need some ideas to fix my mpfi swap

the main relay worked before i did it?
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Old Oct 30, 2010 | 05:31 PM
  #5  
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Default Re: i need some ideas to fix my mpfi swap

thats really whats weird main relays give out at the stupidest times, i was at work last week and there was some kids in the parking lot trying to push start this bone stock super clean electron blue da, it was hilarious cuz they would crank it forever and i was just sitting there like hm that probably needs a main relay, also if an injector power wire grounds or ground wire hits power theres a chance that the main relay can blow ive blown like 5 since i got my car but theyre really easy to fix, but when you turn the key on does your cel turn off or stay on?
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Old Oct 30, 2010 | 05:38 PM
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Default Re: i need some ideas to fix my mpfi swap

the cluster cel light stays on. but the ecu doesnt flash at all. if the battery was low would the pump not prime?
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Old Oct 30, 2010 | 11:45 PM
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Default Re: i need some ideas to fix my mpfi swap

anyone have any ideas?
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Old Oct 30, 2010 | 11:46 PM
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adamyee's Avatar
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Default Re: i need some ideas to fix my mpfi swap

yeah if the battery is low the fuel pump will not prime. my friend bought a perfectly good crx for 300 bucks for that very reason, we put a jump box on it after he paid and signed and it fired up first revolution.
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Old Oct 31, 2010 | 09:38 AM
  #9  
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Default Re: i need some ideas to fix my mpfi swap

allirght ill charge ma batt n see whats up
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