NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   3rd Generation Specific (https://www.nopistons.com/3rd-generation-specific-18/)
-   -   I Got A Problem (https://www.nopistons.com/3rd-generation-specific-18/i-got-problem-27004/)

93 R1 10-17-2003 10:05 AM

O.K. I got my motor in. Pulled the plugs, cranked it to build oil pressure and blow out any **** inside, shot some ATF in to help compression, primed the fuel system, and tried to start it. Just cranks....no start. So I swapped the plugs for new ones Checked all connections and still nothing...



1. Fans run as soon as battery is hooked up...won't turn off

2. Inside cabin there are 3 yellow connectors for computer, 1 white connector and

1 blue one. The blue connector on the old harness is a 10 pin with 10 wires, the

new connector is 12 pin with 11 wires. WHAT IS THIS CONNECTOR FOR AND

HOW CAN I MAKE IT WORK? Will that make the car not start? I USED A JSPEC

HARNESS BTW....





I checked:

-CAS is plugged in correctly. Swapped CAS a known good one

-Checked spark with spark tester

-Fuel lines appear to be hooked up correctly. Not binding, looks right. Tried

swapping them, didn't help any

-I'm getting fuel pressure from the pump

-All plugs on engine side of harness are plugged in

-Ground on drivers side battery harness is tight

-2 Grounds under UIM are tight

-Injectors are all plugged in

-Temp sensor is plugged in





Everything looks right, it just will not start. Am I on the right track with the blue connector thing? Do i need to start checking continuity between the injectors, CAS, TPS, etc... and computer?



ANY IDEAS?

93 R1 10-17-2003 10:46 AM

Stock computer and injectors

Danno 10-17-2003 10:53 AM

Maybe you can't use the jspec harness with the stock computer.

vosko 10-17-2003 10:54 AM

is it cranking ?



do you have ignition working ?

93 R1 10-17-2003 11:23 AM

Yeah it cranks and I have spark

Badog 10-17-2003 11:27 AM

If the fans run as soon as you hook up the battery...then the ECU is not seen.



If you were to unplug your ECU without disco'ing the battery...same behavior...fans run...until the battery dies.



Guessing something is not quite right with the ECU connection?

TYSON 10-17-2003 11:31 AM

Justin,



Did you get my second PM?

turbovr6 10-17-2003 11:42 AM

HOLY **** JUSTIN!!!! I HAD THAT PROBLEM!!!



You have to use your old blue connector, I cut the 12 pin connector off the Jspec harness, and wired in my 10 pin connector. All the wires will be the same colors and in the same position, except for the extra wire. I don't know what it is for, I left it unconnected, had no problems!! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

93 R1 10-17-2003 11:47 AM

Tyson yes I did. Thanks alot you are the MAN



Thanks Tony. I appreciate it.



Jay, I was just getting ready to call your cell phone. So just cut it off and wire in the old one and everything is good?

93 R1 10-17-2003 11:48 AM

You guys are great. I owe you one


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