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need some guidance please (again)

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Old May 15, 2021 | 02:46 PM
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Default need some guidance please (again)

hi everyone - this is a 2 parter - feel like a dumb and dumber

after putting everything back together after fixing the fuel lines removing the a/c (for a noisy delete pulley - another story). replaced hoses and cleaned the main part of the throttle body (it was all I had a gasket for at the time). I went to fill and burp the system with one of those fancy fillers that fit on top of the radiator cap https://www.lislecorp.com/specialty-...ree-funnel-606. and ran the car for a while waiting for the level to drop. it did not seem to and the fluid in the container was naturally getting warmer - the dash temp got to 180 after about 1-1-/2 hours plus idling in the garage - on one hand I thought that might be good that it seemed to be taking a while on the other - I was concerned as I had only put in about 2 gallons of fluid (I thought there should be more?) - there was no more air bubbles coming up so I feel like that part went ok - I am not sure about it being full.

dummy #2 - did I mess something up with the throttle body - as the idle was staying at 12-1300 at idle - ?

really want to get through this to enjoy some warm weather IN the car rather than under it

any help would be great - thanks

Sean
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Old May 15, 2021 | 02:54 PM
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My '90 holds 16.7 quarts of coolant.

That's after a complete flush. Meaning refilling coolant in an absolutely, completely, positively, unequivocally empty system.

Unless you pulled the knock sensors, you've probably got at least a gallon of the old stuff already in there. At least.

I always pop the thermostat out and fill the block there.

Not sure about your idle adjustment, there's outliers to different years for adjustment/resetting so far as I know, so surely someone else who is more experienced than me wit hthat stuff can help out with that.

Last edited by Natty C; May 15, 2021 at 03:01 PM.
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Old May 15, 2021 | 05:08 PM
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thanks - i will go at the coolant again - try another empty - refill cycle - i found it looks like 14-1/2 qts - I am going to re-check vac lines again as well - wonder if I missed one putting stuff together
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Old May 15, 2021 | 05:16 PM
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The coolant amount seems right, but I've never had a SBC that idled above 800 rpm Most were right at 600..

Last edited by rocco16; May 15, 2021 at 05:25 PM.
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Old May 15, 2021 | 06:16 PM
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What year is yours? LT1 & LT4 have air bleeders to let the air escape.
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Old May 15, 2021 | 06:23 PM
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1985 -
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Old May 15, 2021 | 09:22 PM
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could there be something that needs reset after cleaning the throttle body/. I am not sure what that would be -
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Old May 16, 2021 | 07:36 AM
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Originally Posted by sb66
could there be something that needs reset after cleaning the throttle body/. I am not sure what that would be -
throttle position sensor maybe ?
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Old May 16, 2021 | 10:22 AM
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this is something that can be reset?
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Old May 16, 2021 | 02:09 PM
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Yes, checkout the corvette ben on youtube. He shows exactly how to reset it with a multimeter.
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Old May 20, 2021 | 08:21 PM
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does anyone know what the box/module/relay/sensor thing is inside the orange box in the top photo? whenever I remove either of the vac lines highlighted in red that lead to it, my newly acquired rattle goes away - as soon as the lines are re-connected the rattle returns. I was checking for any vacuum leaks as I was looking for the problem with the 1200 rpm idle - (yes this weekend I am following the you tube for the code and tps correction - the rattle sound started to concern me as well - I removed the belt and tried spinning each accessory to see if any made noise - the tensioner made a little the air pump did not move as freely as the others and seemed to make a fair amount of noise with the belt on as I checked with the stethoscope

any thoughts or help would be great

thanks

Sean
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Old May 21, 2021 | 05:39 AM
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Originally Posted by rocco16
The coolant amount seems right, but I've never had a SBC that idled above 800 rpm Most were right at 600..
Early on I had idle issues with mine, it at times sat around 1700 rpm's. Found if you tapped the iac with a plastic faced hammer the idle would drop to 600-700 rpms. Replaced the IAC valve and all has been good since.
Just some FYI.
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Old May 21, 2021 | 04:04 PM
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thanks - I will try that as well - I bought a new gasket kit for the entire tb just in case - tps or iac - is the IAC rebuildable - or not even worth it - ?
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Old May 21, 2021 | 05:36 PM
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ok - update did a quick look and for the heck of it pushed on the IAC electronic connection to make sure it was on there fully and tight - idle dropped and stayed from 7-720 - is that more correct?
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