2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

87 Rx7 starting issue

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Old Dec 31, 2011 | 02:39 PM
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87 Rx7 starting issue

I bought the car a while ago and it had been sitting for a very long time. I started out replacing the fuel pump. Once I had good pressure at the entry point of the rail, I put everything back in the car and attempted to start it. The result was the same, starting was still a no go. I pulled the UIM off to get to the rails and pulled them out of the motor. held the injectors with zip ties so they would not pop off. The only injector getting nice constant stream was the rear rotor primary injector. All the others were dead, I say this because I changed other injectors in place of the one that was flowing and still got a stream. I also tried different injector harnesses and the only one that worked was the rear rotor primary rail.

I also took the wiring harness out and check all the injector wires. Everything looks fine!

Does anyone know what this could be or what I can check for?

Thanks in advance,
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Old Dec 31, 2011 | 03:49 PM
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So, you secured the injectors, jumpered the fuel check connector, and only turned the key to "ON", not to "START"... And the rear primary injector was spewing?

If THIS ^ is what happened... Then that injector is bad. (Stuck open.)
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Old Dec 31, 2011 | 03:53 PM
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No, when the ignition is open or on the ON position nothing happens. When you try to start it is when The one primary rear injector starts to spit.
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Old Dec 31, 2011 | 04:06 PM
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Ah, alright. I am asking because that is what I got from your post.

Have your injectors professionally flow-tested and cleaned. If it's been sitting a long time, then the injectors are probably clogged. You can always check the voltage of each injector with a multimeter, at the ECU pins.

Here is a great injector servicing company: Witch Hunter - Fuel Injector Cleaning and Flow Testing Service
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Old Dec 31, 2011 | 06:02 PM
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Thanks dude. Me and my brother are going to a local rotary shop because he told us to test a resistor pack for the injectors. Once of the main Injectors is not giving an ohm reading. I don't think any of the injectors are clogged. We tried every one of them on the one that works and they all spray the same.
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