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

After emissions delete, no idle. Rx7 fc turbo 2 s4

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Old Jul 14, 2014 | 02:20 AM
  #51  
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So new update. I can get it to start running for approx. 6 seconds. But then even while holding the throttle down it will die down and die.... Going to check for leaky injectors but idk
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Old Jul 14, 2014 | 02:22 AM
  #52  
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Originally Posted by clean87
you got new injectors are they the right impedance? 87 had some high and some low impedance
I was pretty sure I got the correct injectors. I got the low impedance because that's what my car needs... I think. I don't remember since I looked at it last
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Old Jul 14, 2014 | 10:41 AM
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You sure AFM is good?
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Old Jul 14, 2014 | 08:14 PM
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From: Bend OR
Pretty sure
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Old Jul 14, 2014 | 08:25 PM
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How did the starter fluid work?
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Old Jul 15, 2014 | 11:12 AM
  #56  
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Literally didn't do a thing
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Old Jul 15, 2014 | 11:35 AM
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Originally Posted by nbjeff
Fireballs good! ��
haha **** yea! long as they don't reach my turbo
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Old Jul 15, 2014 | 11:43 AM
  #58  
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Originally Posted by nbjeff
I was pretty sure I got the correct injectors. I got the low impedance because that's what my car needs... I think. I don't remember since I looked at it last
better make sure about this. ohm those injectors. you don't need to pull the uim off either. you can do it at the pcm connector where the pins are much easier to access. use a pcm pin out. if you're running low impedance without a box, you WILL fry drivers
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Old Jul 15, 2014 | 11:55 AM
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nm, s4 is low impedance. as long as you have the box! or if they're high impedance, no box. but it wouldn't run at all on high impedance with a box anyways i don't think
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Old Jul 15, 2014 | 01:11 PM
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From: Bend OR
Yeah they have the correct brown clips and the fit snug into my new harness patch. So there correct
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Old Jul 15, 2014 | 02:06 PM
  #61  
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i think my next move would be to unplug the circuit opening relay, fuel pump or what ever is easiest to disable the fuel pump.

then crank it, if it is flooded, it will start, run for ~10 seconds and die. if it isn't flooded it'll just crank.

i like to use the circuit opening relay, as its within reach of the driver, and you can start it, and then plug it back in from the driver seat.
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Old Jul 18, 2014 | 03:13 PM
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So I unplugged the fuel pump and it's just cranking... Does that mean it's not flooded? I just went through the entire bay and checked every single vaccum like on the car. And I got rid of a few leaks but now I have absolutely no running car. It just cranks... And cranks.... And makes me want to hit it with a sledge hammer
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Old Jul 18, 2014 | 03:53 PM
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From: New Hampsha
was the fuel pump still unplugged after fixing the leaks? gotta ask these questions...
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Old Jul 18, 2014 | 04:17 PM
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From: Bend OR
Yeah. There was a couple little spurts of it wanting to run but then I just kept cranking
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Old Jul 18, 2014 | 04:24 PM
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From: New Hampsha
so youre saying the fuel pump was NOT plugged in? and it wont start?...
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Old Jul 18, 2014 | 04:48 PM
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Originally Posted by barkz
so youre saying the fuel pump was NOT plugged in? and it wont start?...
When the fuel pump was unplugged it would not start. Then later after trying with it not plugged in for a while I plugged it back in and it still wouldn't start..
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Old Jul 18, 2014 | 05:20 PM
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Either you are not getting sufficient spark or fuel or both and the compression might be lackluster. You could try the starter fluid trick or then again you couldn't but it depends if you want some insight into what's contributing to your no start problem and perhaps you don't want to rule out certain things.
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Old Jul 18, 2014 | 05:38 PM
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From: Bend OR
Originally Posted by satch
Either you are not getting sufficient spark or fuel or both and the compression might be lackluster. You could try the starter fluid trick or then again you couldn't but it depends if you want some insight into what's contributing to your no start problem and perhaps you don't want to rule out certain things.
Okay where do you want me to spray starter fluid?
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Old Jul 18, 2014 | 06:32 PM
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From: https://www2.mazda.com/en/100th/
Originally Posted by nbjeff
So I unplugged the fuel pump and it's just cranking... Does that mean it's not flooded? I just went through the entire bay and checked every single vaccum like on the car. And I got rid of a few leaks but now I have absolutely no running car. It just cranks... And cranks.... And makes me want to hit it with a sledge hammer
hmm, if you unplug the fuel pump, then there will be no fuel, so if it was flooded it will start. but if it was not flooded, then there is a different problem.

do you have spark? you can put a timing light on it and crank it, we don't care if the timing is correct, we just wanna see the light flashing. no flash = no spark = no run.
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Old Jul 18, 2014 | 06:43 PM
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Originally Posted by nbjeff
Okay where do you want me to spray starter fluid?
Did you not already ask this question? Was the question not answered?
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Old Jul 18, 2014 | 11:44 PM
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a timng light would still flash with a fouled plug tho. something to keep in mind...
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Old Jul 20, 2014 | 02:48 AM
  #72  
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From: Bend OR
Okay so I feel like my spark plugs are fouled. So if I get new ones. What would be a good idea when I'm trying to start it. Like since it's probably flooded is there a way that I should try to start it so that I don't foul my new spark plugs?
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Old Jul 20, 2014 | 08:31 AM
  #73  
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Originally Posted by welfare
a timng light would still flash with a fouled plug tho. something to keep in mind...
I can approve this unfortunately.

I would get an inline spark tester or anything related instead. Also since it just cranks, it definitely sounds like a fuel delivery issue. Might need to get one of those fuel pressure testers to see how many psi you got in the fuel system.
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Old Jul 20, 2014 | 12:35 PM
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Originally Posted by nbjeff
Okay so I feel like my spark plugs are fouled. So if I get new ones. What would be a good idea when I'm trying to start it. Like since it's probably flooded is there a way that I should try to start it so that I don't foul my new spark plugs?
There's nothing special to do outside of a normal deflood. I used an auto shipper once upon a time (idiot decision) and they flooded it. I had to pull the plugs, which were indeed fouled, and then succeeded in deflooding it. Those new plugs didn't last very long. Ended up fouling again within 3k miles, iirc. I also have a pig rich tune though, so ymmv. However, while you're elbow deep changing out plugs, check your compression. Like the others before have said, need to identify if it's fuel, spark, or compression related. Otherwise you'll just be chasing snipes in your engine bay.
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Old Jul 20, 2014 | 01:21 PM
  #75  
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Originally Posted by Kenseto
There's nothing special to do outside of a normal deflood. I used an auto shipper once upon a time (idiot decision) and they flooded it. I had to pull the plugs, which were indeed fouled, and then succeeded in deflooding it. Those new plugs didn't last very long. Ended up fouling again within 3k miles, iirc. I also have a pig rich tune though, so ymmv. However, while you're elbow deep changing out plugs, check your compression. Like the others before have said, need to identify if it's fuel, spark, or compression related. Otherwise you'll just be chasing snipes in your engine bay.
Thx

I have a solid 80-85 pounds in the back and 85-90 pounds in the front. So compression is available.
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