D15B Vtec swap into '94 Auto Civic Coupe

[xXRikan215Xx]

HELPPP D15B Vtec swap into '94 Auto Civic Coupe

HELPPPPP.....Im in the process of swapping my original D15B Non Vtec engine for a D15B Vtec. I have a 94 Auto Civic DX Coupe. I'm keeping my original tranny. I bought the engine from a JDM shop around my area. I have a mechanic putting it in and so far it turns on, but not for long. He's telling me theres not enough fuel getting into the injectors and says i have to change the whole wire harness because its now Vtec, but a friend is telling me thats crap. When I bought the engine i also bought a P08 ECU. So the mechanic says its prolly the ECU. I have no idea what the problem could be. If anyone has done this swap before and knows how to fix this please let me know....

 

[93civicracer]

make sure ecu is 4 auto tranny

keep old harness

Rywire - Online Store go there 2 buy vtec subhArness

typEd on psp sorry

 

[xXRikan215Xx]

when i bought the ecu i made sure i told the guy at jdm it was for an auto. how can i tell if its for auto or manual?

 

[xXRikan215Xx]

also i forgot the mention, the distributor on the Vtec was broken, so the mechanic took off the distributor/cap/rotor from the non Vtec and put it on the Vtec.... will that make a difference as well?

 

[93civicracer]

I think you need a Vtec distributor, I know for sure you can use a distributor from a USDM D16Z6. I dunno, my d15b vtec came in great condition engine, tranny, and ecu.

I'd suggest if you're ever gonna swap again later on, go to Specializing in JDM-USDM Engines & Parts...hmotorsonline.com they have the best prices I've seen and customer service is AWESOME.

Whoever told you you needed a brand new harness just because the engine's vtec is bullshitting all you gotta do is run a couple wires, one from the solenoid and one from the oil pressure switch both to the ecu. Rywire - Online Store sells an EASY to install sub-harness that's what I used, but you can do it yourself for free.

 

[xXRikan215Xx]

Would a 92-95 Civic DX to d16z6 (VTEC Subharness) work for an OBD1 D15b Vtec in an originally Automatic non Vtec 94 Honda Civic Dx Coupe? Im keeping it Automatic. Also another question, what would be the ECU code for the Automatic D15b Vtec? I was given a P08 for Manual Trans at first and gave it back because my car is Auto, and they gave me a P07 instead. Do you know if that would work? If not, which ECU should I use?

 

[xXRikan215Xx]

I have a mechanic working on the car and Im not sure how to...

 

[xXRikan215Xx]

do you know what i would have to do to the harness?

 

[93civicracer]

You don't even have to touch the harness to wire in vtec.

Just run 2 wires, one from the vtec solenoid, one from the vtec oil pressure switch, both thru the firewall straight to the ecu. Rywire - Online Store sells an EASY to install subharness it's the dx to z6 vtec conversion subharness. I had mine installed in like 5 minutes.

 

[xXRikan215Xx]

Im not sure which wire is for the Vtec solenoid, and which is for the vtec oil pressure switch.. and if i were to get that subharness instead, would it work on the D15b Vtec i jus put in?

 

[xXRikan215Xx]

Lol my mechanic doesn't know how to rewire it. Any steps available?

 

[93civicracer]

Wow he's a mechanic and doesn't know how to wire vtec?

Run a google image search for "vtec solenoid" and "vtec oil pressure switch" (without quotations). You need to run a wire from these 2 locations, thru the engine bay, straight into the ecu.

Just look it up. Search on here "how to wire vtec" you'll find it trust me it's been covered a million times. And yes, Rywire's harness WILL work with d15b vtec, that's what I used with mine. They provide you with instructions where to plug them into the ecu.

 

[RwD_crx_06]

how the hell u guys know if the distributor is non vtec or vtec? wondering.

 

[xXRikan215Xx]

thanks guys...appreciate all the info

 

[xXRikan215Xx]

I bought the subharness from RyWire.com and bought the P08, but the car doesnt stay on. It turns on for like 2 secs and shuts off.. I noticed the CEL comes on too. I have no idea what is causing the problem... Any advice???


On another note, how do you know whether the ecu is for Auto or Manuel??? I bought it at a JDM spot in my area and they insist itll work for either or.. any codes i have to look for on the ECU to find out??? The numbers on the side read... 37820-P08-900-461-144263

 

[xXRikan215Xx]

ok. so i have an auto, which is what i need.. n typo earlier.. my car still isnt starting then with the correct ecu.. i dont know y

 

[BrutalB83]

Who's Manuel? Do you mean "manual"?

I was tempted to say something about that myself, but I let it go...

 

[xXRikan215Xx]

Who cares if i spelled Manual wrong, like i said it was a typo, get over it... and yes I did do research, and like I said before, Im not the one doing the work a mechanic is... He doesn't know why it's not working because he's apparently looked over everything it could possibly be, but I know he's missing something because if that was the case it would be working by now. So I've been getting on this forum trying to get as much info as i could to see if there's anything he's missing. So if someone's going to be a smartass with their replies instead of giving any helpful info, don't bother wasting your time doing so, or wasting my time reading them. If anyone has any helpful info, please give me your input, if not, then dont write back. Thank you.

 

[BigRedCivic]

I am having the same Problem I have a 94 Civic and my stock engine blew. I am being quoted for the same stock engine for a 94 civic coup dx. I guess a 1.5 db 15. I wanted to upgrade the egine but I cant afford to be without a car for long. What should I get. I really dont want to go stock.

 

[BrutalB83]

Start your own thread then chief. Stop bringing back old ones...