I never really noticed the difference in my trucks performance when it's just started to when it reaches operating temp until I changed over to an electric cooling fan. Now the loss in low end power when the truck gets hot is huge. My only thinking is that the air temp sensor is leaning out the fuel due to the hot underhood air the engine is taking in. I guess getting the clutch fan off the motor lets you feel the actual power more.

Anyone have any ideas if my thinking is correct and what I can due short of a functional ram air hood setup to help fix this problem? I don't have an FIPK intake or anything, just a K&N filter with the airbox cut off and opened up. I reset the computer a kazillion times too.

 

Lets see you are in Fla..not quite as hot as in Texas..its been over 100 for 23 days and I left the snorkel and stock air box on...

The common complaint with the FIpk or the modified box is the summer heat...under the hood is about 160-200 degrees..this is way too hot to serve to the engine..IMHO...I Thermo wrapped all the under the hood lines on my diesel...am thinking about doing the SCrew....

I would bet that you actually lose about 10-15 hp with the FIPK when its hot.....

But when its cool outside I bet you can feel the difference in the breathing....

I am pretty picky about my mods and have been listening to this one closely.....

I am going to work on some type of ramair/cool induction in the next couple of months...will keep you advised....

 

HI!... Relocate your ATS (air temp sensor) to a colder spot. This tricks the computer into thinking it's cold out and gives you more fuel. Worked for me perfectly. When I install it back in the stock location, my truck goes abot 4 tenths slower in the 1/4 mile. Hope this helps you out.

 

from what I have read, I believe that the summer under-hood temps only vary from the outside temp by only a few degrees (while above at least 20 mph, of course)

anyone think that this is untrue??

 

NEAL

where is the ATI and is it hard to move????

 

HI!... LAS52 : The ATS is located in the 90 degree elbow on most aftermarket air intake kits. If you have the stock air box set-up then it will be located in the flexable rubber hose going from the round air box to the 90 degree elbow. The ATS is a small sensor that is balck and simply pushes into a grommet in that rubber hose. Just spray around it with some WD-40 and it will pop right out. I lengthened the wire harness to it and have it stuck out from under my hood on the driver's side up by the wiper cowl in the corner. Hope this helps you out.

 

NEAL

I have the airforce 1-- is it the one closest to the throttle body?
cant you locate it so it is front of the fan or would that be keeping it too cool

 

smcc--yes you are right once you get moving for about 10 miles the temps will get back down,, however when you are in city traffic it gets hot under there, just ask your fan that is engaged for ever....

Here in Texas the pavement is 140 degree and heat rises into your compartment and is trapped until the fan moves it a little,,so we are using about 120-130 degree air to cool an engine that is several hundred degrees...

It gets hot here...

What would be the drawback to the relocation of the temp sensor in the winter, or at other weather conditions, does changing the position affect fuel mileage...Are you sacrifing fuel mileage for power????????

 

NEAL,


Would mounting it in the A/C duct do the trick?? LOL

That is a good idea if your just going for power. I want a nice combination of performance and milege. I know the truck not a a fuel saver, but 11 mpg is just horrible to me.

 

I'm working on routing an AC vent out and directly feed the air intake. At 100+ degrees that 60 degree dry air should do the trick.

(ok I'm not really doing that, but, hmmmm)

 

I working on a cooling jacket for mine with liquid nitrogen. Tha should bring it down a few hundreds degrees and shoot my HP thru the roof. Ok, ok sorry I found it funny. I'll let this get back to a seroius post now.

 

Neal, you rock. I am going to give that ATS sensor relocation a try. My truck is a real dog when the temp is above 95 F.

I have an Airaid intake right now... I am thinking of drilling a hole through the inner fender near the stock air inlet hole and moving the ATS there. I was also thinking of making some sort of dam or airbox that would separate the filter from the hot engine compartment. All I need is some time and patience, right??

 

My '95 uses an airbox with a cool air tube coming from the front of the truck. With heavy drilling on the airbox, but the tube still in place, a cool outside air tube supplies most of the air. The extra drilling allows air to be pulled in from the sides of the box under heavy throttle conditions. Once moving the underhood air temps aren't much higher than outside.

As for the IAT sensor, I have also heard of people using a small resistor in line with it and leaving it in the stock location. This does more of less the same as moving it, but the changes are directly in proportion to the intake air temp. Simply moving the sensor might not pick up the intake temp difference. If you know the resistance readings, you could just cut it off completely and put a resistor in to make the truck think it's 60 degrees out....

 

When you modify your truck your looking for trouble........

 

NOOOO, I think we are just looking for more horse power!No trouble here.