My truck is off to shop #4
May 9, 2008 | 07:03 AM
#261
9 Second Truck Club
iTrader: (16)
Joined: Sep 2006
Posts: 3,655
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From: Colorado Springs, Co/ Central, Ca
Charris and I have spoken about it in the past. He stands firm on the fact that it is measuring the temp of the manifold due to the design of the port where the iat sensor is located. I've got to agree to an extent.
I was told on the dyno the temp at about 2000rpm was 170* and by 6300rpm it was in the 240* range. that's a big temp jump in 3 sec.
I was told on the dyno the temp at about 2000rpm was 170* and by 6300rpm it was in the 240* range. that's a big temp jump in 3 sec.
May 9, 2008 | 07:25 AM
#262
Charris and I have spoken about it in the past. He stands firm on the fact that it is measuring the temp of the manifold due to the design of the port where the iat sensor is located. I've got to agree to an extent.
I was told on the dyno the temp at about 2000rpm was 170* and by 6300rpm it was in the 240* range. that's a big temp jump in 3 sec.
I was told on the dyno the temp at about 2000rpm was 170* and by 6300rpm it was in the 240* range. that's a big temp jump in 3 sec.
Even still, if it was a hot start, it should settle down eventually. A dyno pull of 2000RPM and 170* IAT sounds whacked, even the RADIX aluminum manifold doesn't get those kind of temps.
EAD mentioned where it is and the big "ifs"...what about the MAF IAT? It is out of the picture right? You don't have 2 sensor inputs into the pcm do you? How about your wiring from the IAT you are using? It is good wire right? No nicks or possible high resistance scenarios?
Fug a bunch of buying more ****, that IAT is incorrect IMO. Or it is being affected by your headers directly.
May 9, 2008 | 07:27 AM
#263
Dan...do what I'm gonna do: drive what u got like u stole it til the thing pukes - pull the motor, put it on a stand in ur living room as a warning to ur kids. Then buy a new motor based on everything uv learned, built by the one builder u can now trust.
May 9, 2008 | 07:42 AM
#264
No MAF. Cold start the lowest I've seen the IAT is 78* and that was on a 30* night. Doesn't make sense. This was after the truck sat for 12hrs outside. I would say it was running for no more than 1min when I measured it since I was still in the parking lot, in park.
as for the wires, hmmm, not sure. I'll check it out. Truck is in the trans shop right now so I won't be able to even look till next week.
I think I'm gonna move the battery back where it belongs, move the pcm back where it belongs(if I can figure out how to), move the air filter back where it belongs, and make sure it is boxed in. I tried putting it down in the bumper but there's barely enough room between the efans and crank pulley.
I'll replace the IAT sensor, maybe it's messed up and also inspect the wires. I think I'll be chasing my own tail though because I've been reading similar stories on a Mustang forum about insane IAT temps with these blowers. Something isn't adding up here.
as for the wires, hmmm, not sure. I'll check it out. Truck is in the trans shop right now so I won't be able to even look till next week.
I think I'm gonna move the battery back where it belongs, move the pcm back where it belongs(if I can figure out how to), move the air filter back where it belongs, and make sure it is boxed in. I tried putting it down in the bumper but there's barely enough room between the efans and crank pulley.
I'll replace the IAT sensor, maybe it's messed up and also inspect the wires. I think I'll be chasing my own tail though because I've been reading similar stories on a Mustang forum about insane IAT temps with these blowers. Something isn't adding up here.
May 9, 2008 | 08:08 AM
#265
Quit worrying about anything else than the IAT sensor until you fix it. After sitting overnight, mine always starts at ambient. If your PCM pulls spark based on IAT, and I doubt that it isn't, then you are losing quite a bit of power from that alone.
May 9, 2008 | 08:22 AM
#266
9 Second Truck Club
iTrader: (16)
Joined: Sep 2006
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From: Colorado Springs, Co/ Central, Ca
Either the sensor is bad, or the wire. I could see that being the cause of alot of the issues you have had with that truck. If the wire harness is hacked up I would get a new harness on there.
May 9, 2008 | 08:29 AM
#267
yeppers.
Originally Posted by DanaliHD
move the pcm back where it belongs(if I can figure out how to)
I am sorry, I haven't been following your build(s) to well. The PCM has been relocated? As in shortening or elongating the harness? OMG, there could be a plethora of problems right there.
May 9, 2008 | 10:51 AM
#268
yeppers. I am sorry, I haven't been following your build(s) to well. The PCM has been relocated? As in shortening or elongating the harness? OMG, there could be a plethora of problems right there.Just got a call from the transmission guy. He was laughing. Said he's never seen a 4L80E that fucked up. "i'm surprised though, your fluid didn't look THAT bad" he said. I said "that fluid is a week old". He said, "your fluid looks REALLY bad then, lol"
May 9, 2008 | 11:03 AM
#269
lmao, no no. It is no longer in the box it belongs in. It is now mounted between the headlight and the radiator. only moved about a foot. The main engine harness is brand spankin new.
Just got a call from the transmission guy. He was laughing. Said he's never seen a 4L80E that fucked up. "i'm surprised though, your fluid didn't look THAT bad" he said. I said "that fluid is a week old". He said, "your fluid looks REALLY bad then, lol"
Just got a call from the transmission guy. He was laughing. Said he's never seen a 4L80E that fucked up. "i'm surprised though, your fluid didn't look THAT bad" he said. I said "that fluid is a week old". He said, "your fluid looks REALLY bad then, lol"
Tell your transmission guy I can send him my old 80e parts and my fluid was black if it makes him feel better.
May 9, 2008 | 11:31 AM
#270
TECH Enthusiast
Joined: Jan 2003
Posts: 589
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From: Queens, NY
My IAT's scare me. they READ 90* as soon as I start the truck, even on a 30* day. They have READ well over 200* on the dyno.
given that, is upping the cr still suggested? I was told yes by others who I trust as well. I want to feel like I'm driving a 400hp camaro. Know what i mean?
given that, is upping the cr still suggested? I was told yes by others who I trust as well. I want to feel like I'm driving a 400hp camaro. Know what i mean?
worse
Charris and I have spoken about it in the past. He stands firm on the fact that it is measuring the temp of the manifold due to the design of the port where the iat sensor is located. I've got to agree to an extent.
I was told on the dyno the temp at about 2000rpm was 170* and by 6300rpm it was in the 240* range. that's a big temp jump in 3 sec.
I was told on the dyno the temp at about 2000rpm was 170* and by 6300rpm it was in the 240* range. that's a big temp jump in 3 sec.
I'm not liking that blower kit, then again I've heard of these headaches with teh KB's. Heck with a centi or a turbo and a front mount intercooler you could boost it to the moon like that motor wants and not have these temp issues. I'd love to see what my blower could do on your motor. (and your soon to be bulletproof trans, because at 12 pounds it ran thru my stocker no problem)