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Old 03-30-2019, 11:25 PM   #36
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Update. I replaced the throttle body today with a new one ($45 plus shipping from Tasca). Idle is improved; it no longer drops to 400 rpm and almost stalls.

Comparing the old and new TBs off the car, I notice the old one's gearbox was distinctly noisier when operating the throttle plate by hand. No doubt it was starting to wear out.

While I was at it, I also replaced a few $6 PCV system hoses and valves--cheap insurance.

It literally took 30 minutes to replace the TB, so an easy fix for anyone handy with a wrench.
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Old 03-31-2019, 09:52 AM   #37
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Originally Posted by tym_v6 View Post
Update. I replaced the throttle body today with a new one ($45 plus shipping from Tasca). Idle is improved; it no longer drops to 400 rpm and almost stalls.

Comparing the old and new TBs off the car, I notice the old one's gearbox was distinctly noisier when operating the throttle plate by hand. No doubt it was starting to wear out.

While I was at it, I also replaced a few $6 PCV system hoses and valves--cheap insurance.

It literally took 30 minutes to replace the TB, so an easy fix for anyone handy with a wrench.
So replacing the TB is the only way to fix it? I’m having the dropping rpm after filling up and also my TB is hanging. When going through a parking lot it self drives at 10+mph. Or is that Normal? I wouldn’t mind 5 mph but 10+ is a little fast.
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Old 03-31-2019, 05:30 PM   #38
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Originally Posted by tym_v6 View Post
Update. I replaced the throttle body today with a new one ($45 plus shipping from Tasca). Idle is improved; it no longer drops to 400 rpm and almost stalls.

Comparing the old and new TBs off the car, I notice the old one's gearbox was distinctly noisier when operating the throttle plate by hand. No doubt it was starting to wear out.

While I was at it, I also replaced a few $6 PCV system hoses and valves--cheap insurance.

It literally took 30 minutes to replace the TB, so an easy fix for anyone handy with a wrench.
So replacing the TB is the only way to fix it? I’m having the dropping rpm after filling up and also my TB is hanging. When going through a parking lot it self drives at 10+mph. Or is that Normal? I wouldn’t mind 5 mph but 10+ is a little fast.
Doesn't sound normal. Have you tried cleaning your TB (with battery disconnected) and then doing the idle relearn to see if that helps.
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Order: 10/13/12 | VIN: 10/19/12 | Sticker: 11/3/12 | Build: 11/30/12 | Mine: 12/22/12!

Restoration project back on the road: my dad's 1969 Camaro SS 350
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Old 03-31-2019, 07:25 PM   #39
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Originally Posted by tym_v6 View Post
Update. I replaced the throttle body today with a new one ($45 plus shipping from Tasca). Idle is improved; it no longer drops to 400 rpm and almost stalls.

Comparing the old and new TBs off the car, I notice the old one's gearbox was distinctly noisier when operating the throttle plate by hand. No doubt it was starting to wear out.

While I was at it, I also replaced a few $6 PCV system hoses and valves--cheap insurance.

It literally took 30 minutes to replace the TB, so an easy fix for anyone handy with a wrench.
So replacing the TB is the only way to fix it? I’m having the dropping rpm after filling up and also my TB is hanging. When going through a parking lot it self drives at 10+mph. Or is that Normal? I wouldn’t mind 5 mph but 10+ is a little fast.
Doesn't sound normal. Have you tried cleaning your TB (with battery disconnected) and then doing the idle relearn to see if that helps.
I’m going to do that tomorrow along with the MAF.
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Old 04-01-2019, 01:50 PM   #40
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Start with the easy ones, add a fuel additive: techron is good. And change your gas station. See how it does.
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Old 04-01-2019, 06:22 PM   #41
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Start with the easy ones, add a fuel additive: techron is good. And change your gas station. See how it does.
I’ve used Techron and Lucas additives. Sam’s Club 87 and 93 octane, also Brookshire’s gas.

I might just change the TB. It has 84k on it and an unknown maintenance history.
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