I did a z6 mini me on my 91 hatch with a b2 block, everything went smooth but it wont fire now, i have spark and fuel. we have checked the fireing order many time and it is correct, also have tried turning the cam 180 out and still nothing, i used a p28 ecu with a jumper harness, but i have left a few wires not hooked up yet, could that cause it? Also i used my b2 dizzy because i got a strange looking jumper plug for the z6 dizzy that i could not find the other end to plug into it off my obd0 harness.



PLEASE help me my car has been down for 2 weeks trying to figure this out and nothing is working!

 

you need to run the z6 dizzy the b2 one will not work with the p28

so get a jumper and run the z6 dizzy bro should solve your problem

 

Strange dizzy plug you say? My first guess.....was your car a dual point (dx) model? If so, did you remember to convert to MPFI (4 injectors)?

If your car was already converted, did you use and obd1 distributor?

 

Post pictures or take it to your mechanic. Seems your capablities are off...

 

Thanks for the quick replies.

i figured that out last night so i switched them out today and still the same problem, got fuel, got spark, but no fire.

And yes it was dpfi but i went mpfi at the same time as the mini me (probally shouldnt of) but that doesnt seem to be the problem, it has fuel and i swapped the throttle pos wires around like i have read about.


I also hooked all the wires up off my ecu jumper harness except the check engine siginal, and i didnt figure i needed it to have the car start.

I will post pics shortly and you guys tell me what you think because we are at a loss.

 

if you can try using a known working distributor with your swap

if not pull out your coil and igniton moduel and get them tested at

autozone

 

The one i got with the head is supost to be working, but you never know,
thanks for the tip though ill keep it in mind.

Im going to post pics in a sec and you can tell me if you see anything wrong.

 

Sorry its blurry, car isnt here to get another pic tonight.





Here is some pics, let me know if you see anything that looks wrong. getting a new set of wires tomorrow to see if that fixes anything.

 

Not tryin to be mean but I see a few things wrong.
1. you are missing the 2 wires for the cps they are the blue/green and blue/yellow wires you are missing going to the dizzy.
2.you are missing the dizzy plug for the engine harness side.
3. a p28 does not use a knock sensor.
4.you used quick connects and wire nuts the worst things to use.

 

Thanks i need all the info i can get, complely new thing im getting myself into.

I noticed the wires missing too but i dont know where to get them from, there not in my factory harness, do i have to run them myself? i know im missing the dizzy pulg for the harness side it got pitched on accident and that was just teporary along with the wire nuts and the other stuff. and i know the p28 doesnt have a knock sensor but i heard somebody say i might have to ground it since there isnt one so i gave it a shot.

Also could fuel pressure be the problem? i have the regulator just on the rail at the moment because i am un able to go about finding information on how to hook it up to my 91 dx fuel pump

 

if i where you start reading up on dpfi to mpfi swap. then start figuring out where you went rong check my sig for a good right up to do the mpfi swap. it pretty much explains all yoy got to do

 

This is probally a really stupid question but am i able to still do this using the obd0 to obd1 ecu jumper harness i purchased?

 

Yes you can

 

you should solder your wiring connections together and cover them up with heat shrink.

 

ok thanks for the help im going to try this all tomorrow

 

Hey tony, when looking at your ecu wiring, am I supost to look at the plugs with the wires facing me or the plugs?

 

You ALWAYS look at the plugs from the "wire side" not the "ECU side"...

 

Ok thanks, wasn't sure