IAC sim? Such a thing?
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Champion
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IAC sim? Such a thing?
My idle air does not like my new cam in the least. It is always opening and closing during driving making a hissing sound all the time. When I come to a stop it doesnt open in time and makes the truck hesitate. So what I did was adjust the idle screw on my throttle body to have the truck idle at @825, and unplugged the IAC. Problems solved, but now I get a CEL obviously. Is there any way to trick the comp into thinking the iac is still hooked up.[/align]
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From: DFW, Texas
RE: IAC sim? Such a thing?
Indy, I dont know if you can simulate it, it's actually a little plunger that moves in and out based on how much air the PCM tells it the engine needs at idle. I don't think you can just simulate the signal as the PCM isn't polling it for data, it's telling it what to do in reaction to data from other sensors.
If it's any consolation, I was having a bit of trouble a month ago when I replaced the stock one with a BWD brand from Oreilly autoparts. It took about a week for the PCM to figure out the new one and when I put new RR's on last weekend, I got that stumble back when I reset the PCM. It finally leveled out today (I think), but I think this BWD one just reacts slower than the stock one, as I get a slight stumble at idle, then a quick even out.
If it's any consolation, I was having a bit of trouble a month ago when I replaced the stock one with a BWD brand from Oreilly autoparts. It took about a week for the PCM to figure out the new one and when I put new RR's on last weekend, I got that stumble back when I reset the PCM. It finally leveled out today (I think), but I think this BWD one just reacts slower than the stock one, as I get a slight stumble at idle, then a quick even out.
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Champion
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RE: IAC sim? Such a thing?
ORIGINAL: aim4squirrels
Indy, I dont know if you can simulate it, it's actually a little plunger that moves in and out based on how much air the PCM tells it the engine needs at idle. I don't think you can just simulate the signal as the PCM isn't polling it for data, it's telling it what to do in reaction to data from other sensors.
If it's any consolation, I was having a bit of trouble a month ago when I replaced the stock one with a BWD brand from Oreilly autoparts. It took about a week for the PCM to figure out the new one and when I put new RR's on last weekend, I got that stumble back when I reset the PCM. It finally leveled out today (I think), but I think this BWD one just reacts slower than the stock one, as I get a slight stumble at idle, then a quick even out.
Indy, I dont know if you can simulate it, it's actually a little plunger that moves in and out based on how much air the PCM tells it the engine needs at idle. I don't think you can just simulate the signal as the PCM isn't polling it for data, it's telling it what to do in reaction to data from other sensors.
If it's any consolation, I was having a bit of trouble a month ago when I replaced the stock one with a BWD brand from Oreilly autoparts. It took about a week for the PCM to figure out the new one and when I put new RR's on last weekend, I got that stumble back when I reset the PCM. It finally leveled out today (I think), but I think this BWD one just reacts slower than the stock one, as I get a slight stumble at idle, then a quick even out.
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RE: IAC sim? Such a thing?
My IAC makes that loud hissing noise too. I replaced it with a new one and , like "aim" said, it seems to react slower also. I tried unhooking it, which is fine, except that when the a/c compressor kicks in and out idle drops too low. Also, it doesnt start so great when its cold. That really makes no sense too me, it seems as though it would stay closed when the engine is could to allow a richer mixture.
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Champion
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RE: IAC sim? Such a thing?
well Iv replaced Iacs because of the noise and because theyve failed me, but this issue is because of the cam. Im just going to the dealer and getting a wireing diagram and gonna wire in a toggle switch on the power wire, so I can decide when I want it.
