dpfi to mpfi using obd1 injectors

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Old Jun 29, 2005 | 07:52 AM
  #26  
kylefakesi-r's Avatar
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Default Re: (elmalouno)

ecu...pm'd ya back after i read all this. sounds to me like a bum ecu but to be sure make sure you have injector pulse. you may not get injector pulse if there is no crank signal so you may want to check the dizzy wiring
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Old Jun 29, 2005 | 08:44 AM
  #27  
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Default Re: (kylefakesi-r)

Isn't there some kind of clicking noise you can hear if they are working. Liking using a flat head or something.

shane
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Old Jun 29, 2005 | 08:49 AM
  #28  
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Default Re: (vtecn8ive)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecn8ive &raquo;</TD></TR><TR><TD CLASS="quote">Isn't there some kind of clicking noise you can hear if they are working. Liking using a flat head or something.

shane
</TD></TR></TABLE>

there sould have to be crank signal before that would occur. and they make automotive stethoscopes so you don't seem like a truly backyard kinda guy.
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Old Jun 29, 2005 | 09:09 AM
  #29  
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Default Re: (vtecn8ive)

Before I get to the problem, let me just state that people shouldn't be swapping injectors so freely, peak hold and saturation injectors will flow a little differently, especially at low pusle widths. To easily tell them apart, peak hold (low resistance) injectors will read about 2.5-3 ohms of resistance while saturation injectors will read about 12-16 ohms. The reason for the injector resistor box is so that too much current doesn't flow through the injector drivers in the ECU and burn them up.

Back to the problem, check that each (non yellow-black) wire going from the injectors traces back to the ecu correctly. And that when you turn the car to the ON position you should have +12V at the other side of the injector (if i'm not mistaken).
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Old Jun 29, 2005 | 09:14 AM
  #30  
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Default

anyone tell me how the wiring for the distributor SHOULD be? dx harness to the sohc vtec dizzy.
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Old Jun 29, 2005 | 09:19 AM
  #31  
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Default Re: (Bunger)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bunger &raquo;</TD></TR><TR><TD CLASS="quote">

Back to the problem, check that each (non yellow-black) wire going from the injectors traces back to the ecu correctly. And that when you turn the car to the ON position you should have +12V at the other side of the injector (if i'm not mistaken).</TD></TR></TABLE>

there is 12v power on the yellow and black wires. unless there is a bad connection the injector wires are going to the ecu properly


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Old Jun 29, 2005 | 09:23 AM
  #32  
Bunger's Avatar
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Default Re: (elmalouno)

Can you smell fuel at all in the exhaust stream when cranking?
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Old Jun 29, 2005 | 09:29 AM
  #33  
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Default Re: (Bunger)

from where ? the tail pipe? i don't really smell fuel when cranking... although i may not have been paying attention
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Old Jun 29, 2005 | 11:40 AM
  #34  
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Default Re: (elmalouno)

if u crank it over for any more than a normal, quick start, you should be smelling fuel if the injectors are firing.


I hope your not trying to use an obd1 dizzy with an obd0 ecu guy!
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Old Jun 29, 2005 | 12:19 PM
  #35  
type Gendy's Avatar
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Default Re: (type Gendy)

wheeeeeeeeeeeeeeeeeee
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Old Jun 29, 2005 | 01:16 PM
  #36  
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Default Re: (type Gendy)

i have two things to say

1. shes running smooth!

2. Bunger, you the ****** man!


thanks for all your help everyone!
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Old Jul 13, 2005 | 02:12 PM
  #37  
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Default Re: (elmalouno)

the wiring wasn't good? i have a very similar problem! i need help too! my injectors aren't spraying, but the wiring is good at the injector clip to the ecu. Reads 12v at the ecu and the clip.?
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Old Jul 13, 2005 | 03:19 PM
  #38  
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Default Re: (SiBuddy00)

my problem ended up beingthe dizzy... i didn't know it but it was an obd1 dizzy. if your using an obd0 ecu you have to use an obd0 dizzy.
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Old Apr 18, 2019 | 03:18 PM
  #39  
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Default Re: dpfi to mpfi using obd1 injectors (elmalouno)

Originally Posted by Rywire
obd1 injectors run on 12V, so wire all 4 of the blk/red wires leading to the resistor box to the 12v wire (the yel/blk in this case). Also volt meter each injector wire that leads to the ecu. Positions a1,a3,a5,a7


Ryan




EDIT: so to sum it all up you want each injector to go to the ecu (colored wire), and the other wires(striped) to a 12v source(the yel/blk on the eng harness).
where can I get 12v at the ecu ????
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