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

Stumped... Bad stumble

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Old 06-20-14 | 07:13 PM
  #26  
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From: New Hampsha
Yes i get that. So the jump from 550/x to 720/720 is the issue. Trying to figure out why it pegs lean and idles like crap. Also no bac valve. Mike said that may cause an issue. But i dont see how it would only be an issue with 720/x setting. If that were a problem wouldnt i see it at all settings/injectors?
Old 06-20-14 | 07:25 PM
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From: tulsa,ok.
Perhaps there is more load on the car when running 720 primaries as opposed to 550's. Perhaps you can compensate for the lack of a BAC (you are a very bad man) and try to bump the idle a bit and see if that changes the outcome.
Old 06-20-14 | 07:48 PM
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From: New Hampsha
Lol im a bad man. If i hold the pedal at around 1100rpm, i get my afr to 14.5-15.3ish. But the rtek setup wants tps at 20% and idle at 750. And when i get it as close to that as possible thats when im full lean. And this mind you, is with the variable resistor at the full 5v as controlled by the rtek
Old 06-20-14 | 11:10 PM
  #29  
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did you uncheck your ATP?
Old 06-20-14 | 11:35 PM
  #30  
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This sound somewhat similar to the issue I am having as well, but now my TPS is haywire. What is your's reading?
https://www.rx7club.com/2nd-generati...conds-1066105/
Old 06-21-14 | 12:16 AM
  #31  
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From: New Hampsha
my TPS checks out fine. Ive been doing ALOT of reading on the Rtek section of the forum. I think im just going to tune from the 550/550 or 550/720 presets as that seems to be what everyone is doing. i really need my own rolling road...
Old 06-25-14 | 12:23 PM
  #32  
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From: New Hampsha
took her for a real drive yesterday. on the 550/720 preset. AFRs stayed safe all around, but i could not boost past ~5psi.... or so my gauge tells me. so today ill go make up a leak tester from homedepot, maybe its just the gauge/plumbing to it. ive honestly been out of this car for so long that 5psi feels quite fast lol so im not sure if the gauge may just be wrong.
Old 06-25-14 | 06:18 PM
  #33  
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From: New Hampsha
yup, boost leak. the reason i didnt find it before was because i was only spraying near couplers/joints. One of my FMIC pipes has been rubbing against the hole i had to cut for it, rubbing a nice slice through it... so who knows how long i havent even been boosting at full potential. too damn hot to get at it today so maybe tomorrow. just glad i found it!
Old 06-27-14 | 12:34 PM
  #34  
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From: New Hampsha
ok, so boost leak fixed, tested again, no new ones. still same issue... at this point im thinking gauge, or line to it. car keeps pulling after the gauge stops. gonna grab some new "hardware" and re-plumb it and see what happens.
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