sstupid

I understand the difference in DPFI and MPFI. I sold him an MPFI setup off of a '91 Civic Sedan EX. It has four injectors. Are you saying that the MPFI setup off of a Civic Si won't bolt up to a 1.5 L motor?

This is the setup I sold him:

crx_si-r

I didn't say that. What you said was that an mpfi (1.6L) intake and a DPFI (1.5L) intake were the same. They obviously are not, but yes they hare the same bolt pattern. So it will bolt up

sstupid

Oh, brother. Please quote where I said an MPFI and a DPFI intake were the same.

crx_si-r

Is this what you wanted me to quote? Your wording says they are the same

Former User

I think the disagreement is settled. Now please refocus on tech.

crx_si-r

I think the op needs to start from the beginning. I want to say possibly a blown head gasket or getting coolant in the cylinder?

AH419

Well there are dx models(1.5) with mpfi the base model/std is the one with dpfi(1.5) anyway...

sstupid, its all good no worries im going to get this thing figured out i already put too much money and time into it.
so the two red and two yellow wires, what im getting from this will not effect this swap if they are switched up? and all im looking for is tech help not looking for someone hustlin' a plug n' play that isn't necessary.

AH419

A blown HG isn't going to cause this coolant leaking. i looked and realized there was a little gasket for the manifold for the coolant port missing(and therefor leaked into the #4 port into the cyl.) and i read in a write-up to lookout for this.

crx_si-r

The only 1.5 that came with an mpfi manifold is from an HF crx, not an std civic. And you don't want to go with that one because that manifold has an egr valve, and not to mention smaller runners and would require a completely different ecu that you would have to track down.

It makes no differnece which red and yellow wire you leave, as long as you wire in the other 2 injectors. Wiring them up directly to ecu is the same as just wiring 2 straight to ecu. So that wasn't the problem to begin with. It's in the rest of the wiring.

I offer my plug n play harnesses for those who don't want to mess with wiring, or those who mess it up and want it fixed. Just throwing out an alternative, not making you get one.


Now do you have any check engine light codes?

sstupid

It was a misunderstanding. I understand what MPFI is and was pissed that this si-r guy thinks I don't, but it's the internet.

I now understand that MPFI didn't come on any 1.5L, apparently. That means that the EX I took the manifold off of was a 1.6L, I guess. If it will work on a 1.5L, that's all I'm concerned with. I just wanted to make sure I didn't rip off Tony, on accident, with my ignorance.

AH419

I have no check engine light codes as of now because im starting over and have nothing connected, i did have the ecu throwin flashes before i have no idea how to read them other than a long flash is 10 and a short one is 2, the amount of flashes would be different every time and couldnt keep up with it.

crx_si-r

If there were different flash sequences, then that means you had more than 1 code present.
1 long flash means 10
1 quick flash means 1
So the code you were having was:
(long)(fast)(fast) = coded 12 : EGR

or was it:
(Long) = code 10 : intake air temp
(fast)(fast) = code 2 : o2


Either way it seems to all be pointing to wiring/electrical issue.

crx_si-r

I don't think you had a code 12 seeing as the picture of the manifold above doesn't show an egr valve. Unless your ecu is looking for an egr valve? I know automatics had an egr valve. What was the sticker code on the ecu? PS9 or PM6?

Former User

Post a video of the code blinking LED.

AH419

My motor was recently rebuilt and the pos mechanic said it was throwing a code for air intake temp sensor. And that was on the dpfi, im going to post a vid if i have any issues when i finish it this time around but now that i look at it, all my connection werent soldered properly, and i could imagine that a shitty connection would effect all this.

crx_si-r

Well DPFI motors also had an intake air temp sensor

AH419

and the ecu is a pm6
Also is this setup OBD1 or OBD0? can anyone tell me and explain to me via link or something what this OBD means so i have a better understanding of it.

crx_si-r

My guess would be a loose/weak connection at the solder points like you said

crx_si-r

Pm6 is obd0.

crx_si-r

88-91 is obd0
92-95 is obd1
96-98 (civic) is obd2a
99-00 (civic) is obd2b
96-99 (integra) is obd2a
00-01 (integra) is obd2b

crx_si-r

OBD =On Board Diagnostic

Pretty simply put what ecu you are using and it's emission standards

AH419

im trying to find and inexpensive code reader, but it looks like they dont sell them for older cars/obd0

crx_si-r

You don't need it. It is sold but it's pretty much just a paper clip. There is a 2 pin plug on passenger kick panel. Insert a paper clip and make a small jumper (or a piece of wire). Once you jump it, then the light will flash and there is your code.

AH419

ok cool thanks for the info everyone ill let you know how it goes, tomorrow is my day off so ill probly get most of it done. Anything anyone recommends that i do while i am doing this? Also should i just run all injectors off of the a-plug like i did before? a1 a3 a5 a7 to inj. and a15 to the resistor box.

crx_si-r

A13 or a15 either will work