BPT wont start

[Q]

I finaly finished putting the engine into my 94 and i had a bunch of problems with the fuel system and ignition system so now i got those working but the engine wont start. I know the timing is set because corksport made a dash on the engine and disty so that they line up when its timed. The engine just cranks and after cranking it a few times it sounds like its about to start and then just dies. Any suggestions or thoughts of what i could check?

[OsoSlo z28]

double check you have the correct firing order. corksport sucks, so double check your timing as well. if you're positive you have the correct fuel setup, it sounds like an ignition issue.

also check that you're tps is wired up correctly, and make sure you're maf is plugged in.

[LongJohn]

You are going to need an multi meter and you need to trace out the wiring down to the ECU. Since your car is a 94, the wiring harness is totally different, so I'm hoping you bought a wiring harness and ECU to go with the BPT because without BOTH of those you are in deep yoghurt. The harness is based on stuff I've read here and not experience. My experience is with a 93.

[OsoSlo z28]

the bpt will run with the b6 ecu and harness if some minor things are adjusted. i know this because i drove it like that roughly 270 miles. granted, it ran like crap, but it's possible. the car should still start up.

[Q]

Well the firing order is right and the ignition system is hooked up and works. I also do any a complete harness from a 93 mx-3 and the ecu is an upgraded BPT ecu from E.L. Prototypes. Today i sent low voltage pulses through each wire from the ecu plugs and measured them with my multi meter and everything seems to work however at the tps plug i have a light green wire with a red stripe and no diagram for the mx-3 shows that wire being there, so i cut it and it changed nothing. I called some friends who own a shop and they have no more ideas of what could be wrong.

[OsoSlo z28]

so you're using a '93 harness? are you using a '93 TPS? if it's the factory mx3 harness, you shouldn't need to cut any wires.

also check the position of the disty. make sure the motor is set at TDC, and try to get the rotor button as close as you can to being over the #1 plug. this will help make sure you have have too much advance, etc.

<small>[ December 05, 2004, 07:40 AM: Message edited by: OsoSlo z28 ]</small>

[Q]

I'm using the BPT TPS however mazda said that they were the same. Well the problem shouldn't be in the harness beacause i pulled it from a friends 93 mx-3 and he had the BPT swap and his was running.

[OsoSlo z28]

if i remember correctly, the '93 tps is 3wire and the bpt is 4wire. could be wrong though, it's been a while.

[Q]

well the plus from the 93 harness fits the sensor perfectly

[Typhoonk]

I believe all B series engines had a three wire tps when manual tranny, and a four wire when auto.
And make sure you grounded your engine with the proper ground straps at the head, tranny and battery. No ground no spark.
Any way you could post a video or audio of your engine trying to start?

[LongJohn]

I just fired up my BP for the first time yesterday and it fired up. I don't have enough power to get out of the driveway, and it's overheating, but that is a different thread.

Regarding your issue, my '93 has the factory-installed harness. I know it has not been tampered with because my wife bought the car new. The build date on the door panel says 11/92, and it was first purchased in August 93 in California. Mine had a four-wire disty plug (many people say it should have had 3). I've also traced the wires to the ECU plug and they look good for the BP ECU. I'm getting a blink code regarding the crank angle sensor, so I'm going to swap the disty from my B6.

So, I would say you should be able to fire up without cutting any wires on your disty.

There are differences however. When I get my engine running well I will detail them. One of them is that the pressure regulator control valve is not wired properly if you are using the Escort injector harness. You should get a blink code (I'm at work and didn't bring my notes so I don't remember which one) if you are in the same boat.

It is important that you diagnose your blink codes to see what is going wrong. Can someone post the definitive list of blink codes (or a link to them) for the BP06, BP09, and BP10 ECUs? I've been having trouble finding them. In your case it sounds like you have a specially modified ECU so you should get people who set it up and get the blink codes from them.

[Q]

Well i just pulled my tranny to fix the release bearing but i'll try to post an audio or video clip by the weekend. How do i read codes and where do i read them from?