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Re: Heating issue

kdub41 said:
why would they make like a cowl hood if it was going to hurt the engines performance?
Click to expand...

different principles involved. the cowl hood creates a pressure difference in the air between the hood and the windshield, forcing air through the gap.
 
Re: Heating issue

I had a Elcamino with the 305 V-8 that did something similar. It turned out to be the upper radiator hose would collapse internally when I was driving and then open back up at idle.
 
Re: Heating issue

you know hubs what the XXXX does it matter if you see its me then why are you responding??? and i think i have posted like 5 maybe 6! Its not like there is limited space! Most the time when i post i dont search my previous post and just update them, i will try and do that next time. Also i just took it out and its about 85 out right now and sat there trying to tune my cb radio with the ac on and the temp never got above 204 but once again when i start driving it gets hot, it also did this before i cut my hood vents. So now i really think its the 2 row radiator. I think ill put my 3 row back in when i do the transmission cooler upgrade.
 
Re: Heating issue

kdub41 said:
i think i have posted like 5 maybe 6! Its not like there is limited space!
Click to expand...

it's not a space issue, it gets annoying trying to help people when they have multiple threads on the same subject because you end up suggesting the same thing multiple times or going over what someone else already has.
 
Re: Heating issue

Grimm's on it. I'm in a good mood, so copy and paste this into Google, and do a little reading. Your issue isn't that unusual, and there is a lot of experience and good advice on the topic of 4.0 cooling systems around here, if people could just be bothered to spend a few minutes reading, inspecting, cleaning, and testing.

overheating with AC site:naxja.org
 
Re: Heating issue

You could experiment with closing the rear of the vents with some Alabama chrome and leaving the front portion open. It's possible the front of the vents are in a low pressure area and will suck out the hot air.
 
Re: Heating issue

well i just got the 3 core in and it seems to be helping :) but we will see. I also just got my transmission cooler so that will be going in next week, and i will def. be bypassing the radiator.
 
Ok well I think maybe it might be the sensor because it fluctuates a lot. I know on the temp sensor on the thermostat housing the little clip broke off, so u can slide it over the sensor but it doesnt actually snap on, maybe that's it :/ if not then I have no idea.
 
Re: Heating issue

If this is a 96, IINM, the temp sender for the gauge is in the head, not the Tstat housing. 97+ use the sender in the Tstat housing for both the PCM and the gauge, but not earlier models.

I picked up a cheap IR thermometer for exactly this kind of thing. Very handy little gadget.
 
Ok well then what's this?
aefe277e-b68c-acc9.jpg
 
Re: Heating issue

The one in the Tstat housing is used by the PCM (fuel/air mixture I suppose, and when to turn the aux fan on). The one in the head is there only to drive the gauge.
 
Re: Heating issue

Your motor has 2 temperature senders ... one in the t-stat housing, and one in the back of the head. The one in t-stat housing is for the computer to know how hot your motor is running. The computer does things with that information.

The sender on the back of your head sends information to the gauge (or light) on your dash. That sender is located on the driver's side of the head, far back, and has a single wire going to it.
 
Re: Heating issue

Test the one you have first. I picked up a cheap IR thermometer, and have a couple of multimeters for that kind of thing. Just throwing parts at it doesn't always fix it; the last sender I bought, was off by 30 degrees. Testing > guessing.
 
Well I have an ultra guage it's like a scan guage that plugs into the obd2 port so if it's one of the sensors I bet it's the one in the housing since my ultra guage is fluttering too
 
Re: Heating issue

The OBD port reads the coolant temp sensor in the block. The temp sender goes to the gauge. Since the PCM needs to know cold engine temps via the sensor to adjust cold enrichment, A/F, and timing. The sensor is in a location where it gets constant coolant circulation regardless if the t-stat is open or closed so it can read cold temps. Easy test get it running and unplug the component, if it runs like crap it's the sensor also the OBD reading will default to -40 degrees as well. . If it runs the same and the dash gauge pegs, it's the sender.
 
Thanks man once I get back from dove hunting I'll do this. So is the sender just the plug thAt plugs into the sensor?
 
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