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scanmater readings input please.

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Joined
Jan 31, 2006
Messages
8,819
Ok the car is up and running.
BUT
1-The RPM does not want to go lower then 750-700
2-I tried to set the IAC according to GNTTYPE,ORG but that didn’t work
3-I can’t get a trouble code from the computer with out the scanmaster.
4-my o2 mv are crazy at idle they go from 120s to 700s the car has a NEW caspers heated o2 sensor with a new caspers harness.
This is just to start.
Thanks guys
David.

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as you can tell the car has only the DP nothing else after that could that be a problem with the o2 stuff.
 
What chip are you running now? My GN idles at around 800 with the Turbo tweak chip. Try cleaning the IAC and throttle body with some carb cleaner and reset it, is your TPS with in range?. Your o2's are supposed top jump around at idle.
 
Thats an old school chip,I had the same chip in my car way back, then I went to a Red's 93 chip, now I have a Turbo Tweak chip and the car never idled and ran so good. If I were you I would upgrade the chip to a more modern one, especially with todays gas.
 
Thats an old school chip,I had the same chip in my car way back, then I went to a Red's 93 chip, now I have a Turbo Tweak chip and the car never idled and ran so good. If I were you I would upgrade the chip to a more modern one, especially with todays gas.

thanks i already talked to TT about a chip i just need to get him some info about my injectors.
 
Why do you want your rpm to drop below 700?? Are you trying that the old defunct IAC reset procedure? That's the best way to really confuse new guys to this stuff, and it really accomplishes NOTHING.

There's a perfectly simple method to get your IAC numbers in spec if that's what you're trying to accomplish.

I see your IAC is around 50 or so. That's not terrible, but can be improved upon simply by adjusting your minimum air bleed screw (often mistaken for an idle rpm adjustment). It's up there on the throttle body and controls the minimum opening of the throttle plate.

CW lowers IAC, CCW raises IAC (within certain limits)

Check and see if the tip of that screw is touching the arm of the throttle plate stop. If it isn't, it should be. If it is, try turning 1 full turn CW. Your rpm will increase momentarilly, but the computer will correct this by decreasing the IAC and bringing the idle rpm back down to the chip's set value.
You will also need to reset the TPS at this point, since adjust the air bleed screw will take the tps out of spec.

Keep doing this until you get your IAC number where you like it (hopefully around 10-20 at idle in park).

BTW, your O2 numbers are supposed to be all over the place during idle and cruise loads. That's closed loop mode and it's bouncing around stoiceometric and trying to maintain 14.7:1 A/F ratio. Perfectly normal unless you end up with a chip that has open loop idle.
 
Thanks Dude
But I just back from working on the car and I completely for got about the engine and started mounting some interior stuff.
I even forgot to get the injector info for TT so that he can make the chip for me.
I will get back on the engine and get some more info for you guys.

But I will get the info for TT first so that I won’t have to set it up again
 
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