I need help my car will only let my give about 1/4 throttle and if I give it more it falls flat on its face. I little background it a 88 hf with a 90 dx motor and 90 si ecu, I have codes 6,7,9,10 right now show on my ecu. I am not shore but I dont think the 90 ecu is right for my cars set up.

Any help please

 

Have you checked your timing?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adeline &raquo;</TD></TR><TR><TD CLASS="quote">I need help my car will only let my give about 1/4 throttle and if I give it more it falls flat on its face. I little background it a 88 hf with a 90 dx motor and 90 si ecu, I have codes 6,7,9,10 right now show on my ecu. I am not shore but I dont think the 90 ecu is right for my cars set up.

Any help please </TD></TR></TABLE>

If you still are running DPFI on the D15B2, then the PM6 ECU is not for you. If you did a MPFI conversion, check your wiring.

 

i will check the timing I am use a stock hf harness and one of my big question is the 90 si ecu any different the the 89 I use to ran with my last dx motor with a si intake manifold.


Modified by adeline at 2:14 PM 4/17/2008

 

any help at all

Anyone?!

 

You're not making this easy for us because you're not being very clear as to what your setup is.

Let me get this straight: You're running a D15B2 motor with an HF harness and a PM6 ECU?

Have you done the full MPFI conversion or did you just slap a MPFI mani on there? Did you convert the HF harness correctly?

 

I recommend you take it to a shop or tear out that DX motor and drop a proper B16 or 18 setup in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by th3pwn3r &raquo;</TD></TR><TR><TD CLASS="quote">I recommend you take it to a shop or tear out that DX motor and drop a proper B16 or 18 setup in.</TD></TR></TABLE>

Wow, I can't even begin to tell you what's wrong with your "help". A B-series swap isn't necessarily always the best swap for everybody n00bert.

 

why would have to charge and hf harness to mpfi? I put the si manifold on a d15 and yes I am running a 90 pm6. What is wrong with that?

The only things i change on thed 15 was the complete manifold and the distributor
what else do I need to change

 

looks like u didn't wire up the mpfi...

http://www.angelfire.com/d20/h....html

 

your dx motor is only running 2 injectors and it dont match up with a si ecu because the si is four injector go buy a 0bd0 dx ecu then you wil be fine OR convert to mpfi with the si manifold
http://www.angelfire.com/d20/h....html

 

what are you guy not getting about running a hf harness that use 4 injector just like the si and I am use a si manifold on a dx motor. I know that the dx only runs 2 injectors, I have all three models of crx.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by th3pwn3r &raquo;</TD></TR><TR><TD CLASS="quote">I recommend you take it to a shop or tear out that DX motor and drop a proper B16 or 18 setup in.</TD></TR></TABLE>

If I wanted a b-series swap then I would have already done one. I am just trying to keep it running well enough to get something else and then I am going to start a full restoration on my car.

If you think a b-series in so nice give me the money for one and I will spend it on something worth while.

 

Well, based on your codes, I'm guessing you have the sensors hooked up wrong. Can you take pics of your IAT, Coolant temp sensor, and TPS or tell us the color of the wires running to each plug?

Also, which distributor are you using?

 

i am using a hf or si distributor and is their any difference in the wiring in the engine bay of a 90 si then the 88-89

 

anymore help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by adeline &raquo;</TD></TR><TR><TD CLASS="quote">i am using a hf or si distributor and is their any difference in the wiring in the engine bay of a 90 si then the 88-89 </TD></TR></TABLE>

No, but there are differences between the HF and other models.

 

I just asking because I use the same wiring harness and everything on my last dx motor that I put in my hf and I didnt have this big of a problem

 

CHECK YOUR GROUNDS tighten them up tight maybe your timing is off or maybe spark plug is not in correct

 

well I bought a new tps and now I have full throttle back but, my ecu will not reset. I tried pull the hazard and ecu fuse and ever pulled the ground form the battery, no matter what I try it still starts flash codes as soon as I turn the key.

 

Maybe because the codes still need to be fixed? Is it running perfectly now or did you just get it out of limp mode?

 

what distributor are you using
can u post pics of motor

 

it just got over the limp mode and i already stated what distributor I am using, what kind of engine shot do you need?

 

Post pics of the IAT, CTS and TPS. They're all two-pin connectors, I'm guessing you connected them wrong at some point.

 

I will take those when I have time working a lot and the tps in a three wire plug