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Old 06-09-2006, 12:47 PM   #1
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Help me identify some wires for my swap

Honda guys... please help.

I have three pictures that I need help identifying.

First question is for my dpfi to mpfi swap. The following picture is of the new engine (MPFI, OBD1) looking at the injectors from BEHIND the engine.



On my DPFI I have two sets of injectors. Injector 1 has a yellow wire and a yellow/black wire (ground I assume). Injector 2 has a red wire and a yellow/black.

In the picture above, what are the injector numbers? I need to know this so I can properly connect the existing injector wires to the new ones. ALSO... for the ground on the new injectors I'm wiring up (3 and 4 I assume) can I just splice into the grounds from injectors 1 and 2?


Okay, on to the next question.

These next two pictures are from the d15b2 engine, DPFI. I have no idea what these wires are as I cannot find an equivilant on the new engine. both of them are taken from behind the engine.





Any help would be appreciated.
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Old 06-09-2006, 01:01 PM   #2
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Injectors are numbered from timing belt to the other side, so 1,2,3,4 from left to right in your picture.

You want to run all 4 yel/blk power lines from the new injectors to one from the old one, the injectors are a switch ground, but get constant power.

I dunno what the green thing is, but I think the second is the leftover plug that you get (besides the injectors) when you do the mpfi swap. I'm using that plug for the IM mounted purge solenoid so I can eliminate the one of the firewall.
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Old 06-09-2006, 02:54 PM   #3
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Matt: On the green thing, it is a coolant temperature sensor. The sensor uses two wires, one for the positive, one for the negative. I don't know where their's one on your new engine, but it's got to be their. It might be a one post sensor, using the frame ground for the other side. If it is I think you'll want to put in the green thing, from your old engine.
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Old 06-09-2006, 03:22 PM   #4
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Quote:
Originally Posted by Gary Palmer
Matt: On the green thing, it is a coolant temperature sensor. The sensor uses two wires, one for the positive, one for the negative. I don't know where their's one on your new engine, but it's got to be their. It might be a one post sensor, using the frame ground for the other side. If it is I think you'll want to put in the green thing, from your old engine.
Thanks for the info. If it's the coolant temp sensor then I know exactly where it goes. The new engine has a coolant temp sensor on the thermostat housing.
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Old 06-09-2006, 03:27 PM   #5
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I was just about to say the new one is on the thermostat, damn you matt, damn you.
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