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Rx 7 series 4 won't start.. injectors this issue?

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Old Sep 15, 2021 | 03:33 AM
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Rx 7 series 4 won't start.. injectors this issue?

Rx7 series 4 my injectors might be blocked.. got a new fuell pump and fuel it's making it to the fuel reg but car still won't kick over..i have spark and fuel this why i feel maybe injectors.. any ideas
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Old Sep 15, 2021 | 01:11 PM
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welcome to the board.

it may be the injectors. if they have never been serviced before, then it would make sense.

it's probably best if you set the stage a bit for us though. did this happen all of a sudden? was the car down for a little while and you're putting it back together now? is it a stock setup or have there been any mods concerning fuel or fuel management? that sort of thing ....
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Old Sep 15, 2021 | 02:46 PM
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So yea it has been sitting for like 6 moths it was running b4 then so as for mods outs got ato4e turbo ,42mm waste gate ,front mount intercooler, 12a turbo injectors ,500hp fuel pump, sard rising rate file reg, micro tech ecu and miled ports in the secondary.. maybe a few other things running 8psi 325 hp at wheels
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Old Sep 16, 2021 | 09:13 PM
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and you've checked whatever fuses or relays you have running the injectors?
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Old Sep 18, 2021 | 09:28 AM
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Try a fresh set of plugs after deflooding it?
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Old Sep 18, 2021 | 05:37 PM
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Originally Posted by DR_Knight
Try a fresh set of plugs after deflooding it?
New plugs? I have tested the spark and its fine tho
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Old Sep 18, 2021 | 05:39 PM
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Originally Posted by diabolical1
and you've checked whatever fuses or relays you have running the injectors?
Yea i pulled the injector fuse out that all good tried starting it with out it in to make sure it not flooded still no luck
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Old Sep 19, 2021 | 02:38 PM
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maybe try hooking up a test light or something similar to each one of the injector plugs and see what happens when you're cranking it. likewise, if you can set up a rig to test the injectors themselves to see what they are doing, that would be helpful, too.

if those tests check out fine, then you can start looking at the Microtech itself.
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Old Sep 19, 2021 | 04:35 PM
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Originally Posted by diabolical1
maybe try hooking up a test light or something similar to each one of the injector plugs and see what happens when you're cranking it. likewise, if you can set up a rig to test the injectors themselves to see what they are doing, that would be helpful, too.

if those tests check out fine, then you can start looking at the Microtech itself.
yea i did there light test might double check i got all of them maybe one is out thanks.. how fo you check injectors..microtec would be out of my depth i think

Last edited by GRMLEN; Sep 19, 2021 at 04:56 PM.
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Old Sep 19, 2021 | 08:14 PM
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Originally Posted by GRMLEN
yea i did there light test might double check i got all of them maybe one is out thanks..how fo you check injectors.
well, if they lit up, then i would think they are getting the signal. in your response to DR Knight's post, are you saying that they are not getting wet? if so, then you may have your answer because you confirmed a signal at the injector and fuel at the rail. testing the injector yourself would require making something to test them. i've never done it. i've seen it done (in videos) and thought about building something, but have not acted on it. all in all, it's probably easiest (and best) to just send them out. i don't know what it would cost in NZ, but for what it's worth, it's not prohibitively expensive here.

have you tried maybe moving the injectors around? maybe swap the primaries and secondaries?

.microtec would be out of my depth i think
always good to know your limits. if the plugs are getting wet, and it's not starting, then i would say check the Microtech.
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Old Sep 19, 2021 | 08:51 PM
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Originally Posted by GRMLEN
yea i did there light test might double check i got all of them maybe one is out thanks.. how fo you check injectors..microtec would be out of my depth i think
Originally Posted by diabolical1
well, if they lit up, then i would think they are getting the signal. in your response to DR Knight's post, are you saying that they are not getting wet? if so, then you may have your answer because you confirmed a signal at the injector and fuel at the rail. testing the injector yourself would require making something to test them. i've never done it. i've seen it done (in videos) and thought about building something, but have not acted on it. all in all, it's probably easiest (and best) to just send them out. i don't know what it would cost in NZ, but for what it's worth, it's not prohibitively expensive here.

have you tried maybe moving the injectors around? maybe swap the primaries and secondaries?


always good to know your limits. if the plugs are getting wet, and it's not starting, then i would say check the Microtech.
I can't swap the injectors over because the secondary ones are 12a turbo ones other ones standard series 4 ones..
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