C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old 02-18-2019, 05:46 PM
  #41  
Radioway
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Originally Posted by 84 4+3 View Post
So there have been a few good suggestions on the rich smell. Another thing to check, the oxygen sensor and the thermac. Do the flaps on the air cleaner ever open up?

For the oxygen sensor, there is a way to test it with a paper clip on the aldl connector but that eludes me at the moment. It will also tell you if you're running rich or lean. I'll see if I can dig it up.

The other thing it could be is if the cat is gutted or bad and broken you'll get that smell too.

On the coolant sensor, does the car ever idle down to ~7-800 rpms? It never will if that isn't reading right.
It has been 600 at hot idle. But sense i replaced the cap and rotor its holding at 1100

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Old 02-18-2019, 06:09 PM
  #42  
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Originally Posted by Radioway View Post
It has been 600 at hot idle. But sense i replaced the cap and rotor its holding at 1100
Check timing and check for vacuum leaks.
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Old 02-18-2019, 06:21 PM
  #43  
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Originally Posted by 84 4+3 View Post
Check timing and check for vacuum leaks.
Sorry for the ignorance. My knowledge is limited and im still learning. How?
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Old 02-18-2019, 06:38 PM
  #44  
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Also, can you replace just the two injectors without having to rebuild the whole throttle body?
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Old 02-18-2019, 08:20 PM
  #45  
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Originally Posted by Radioway View Post
Also, can you replace just the two injectors without having to rebuild the whole throttle body?
Yea. You unplug the connector then remove the 4 or 5 torx screws on the top plate and pop it out. Pretty simple.

Vacuum leaks are easy, using starting fluid just spray around the throttle body bases, the lids and vacuum ports. If you get a sudden rpm change there is an air leak.

For timing, that may be easier to watch a YouTube video on. But I will say this, to get it in base timing mode there should be a tan white with a black stripe by the brake booster with a plug in the middle. Disconnect that before starting.

And before all this, did you disconnect the battery while doing the cap and rotor. If so the high idle may be the fact that the iacs haven't done their relearn yet.
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Old 02-18-2019, 08:24 PM
  #46  
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Originally Posted by 84 4+3 View Post
Yea. You unplug the connector then remove the 4 or 5 torx screws on the top plate and pop it out. Pretty simple.

Vacuum leaks are easy, using starting fluid just spray around the throttle body bases, the lids and vacuum ports. If you get a sudden rpm change there is an air leak.

For timing, that may be easier to watch a YouTube video on. But I will say this, to get it in base timing mode there should be a tan white with a black stripe by the brake booster with a plug in the middle. Disconnect that before starting.

And before all this, did you disconnect the battery while doing the cap and rotor. If so the high idle may be the fact that the iacs haven't done their relearn yet.
Yes i disconnected the batt. And i just went down and gave it another start and it idle back down at 600 rpm. I will say this it does sound good. And i dont really have any other issues to be honest
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Old 02-18-2019, 09:18 PM
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Originally Posted by Radioway View Post
Yes i disconnected the batt. And i just went down and gave it another start and it idle back down at 600 rpm. I will say this it does sound good. And i dont really have any other issues to be honest
Well, the old adage goes, if it ain't broke then don't fix it. If you're concerned about the fuel smell get it hooked up to a scanner but honestly, a little fuel won't kill it.
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Old 02-21-2019, 04:13 PM
  #48  
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Ill be putting new o2 and coolant sensors on next week
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Old 02-22-2019, 09:07 AM
  #49  
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Originally Posted by Radioway View Post
Youngstown
Small world, I'm from Youngstown also!
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Old 02-22-2019, 09:37 AM
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Originally Posted by kane0021 View Post
Small world, I'm from Youngstown also!
There are actually more than a few CF C4 owner's here in NE. Ohio. We should arrange a meet and greet for coffee somewhere this summer.
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Old 02-22-2019, 11:55 AM
  #51  
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Originally Posted by drcook View Post
there are actually more than a few cf c4 owner's here in ne. Ohio. We should arrange a meet and greet for coffee somewhere this summer.
👍👍👍
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Old 02-22-2019, 12:14 PM
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Originally Posted by Radioway View Post
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What is this ? On my computer, it just doesn't have quite the intended result. I just see little black dots. I can't tell what they are.
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Old 02-22-2019, 12:54 PM
  #53  
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Originally Posted by drcook View Post
What is this ? On my computer, it just doesn't have quite the intended result. I just see little black dots. I can't tell what they are.
Thumbs up
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Old 02-22-2019, 09:40 PM
  #54  
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Originally Posted by drcook View Post
45 minutes to an hour away depending on traffic, and the detours around here due to construction. I live straight across 224 from you, or straight across 76, then a jog down to 224, where 76/224 run together, about 13 miles from I-71. Oh well.
So you live close to Summit Racing then? I'm in Cornersburg, right around the corner form Radioway.
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Old 02-23-2019, 02:10 AM
  #55  
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Originally Posted by Radioway View Post
It's not really a cone more like a fan
Here's what mine looks like. Point your ignition timing light at the injector to see the pulse.


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Old 02-23-2019, 07:34 AM
  #56  
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So you live close to Summit Racing then? I'm in Cornersburg, right around the corner form Radioway.
A little further west, on the other side of Akron
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Old 02-23-2019, 07:34 AM
  #57  
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Originally Posted by drcook View Post
A little further west, on the other side of Akron
Im about an hour from summit i believe
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Old 02-23-2019, 07:39 AM
  #58  
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Originally Posted by Radioway View Post
Im about an hour from summit i believe
We go over that way quite often. To the fair, occasionally a Corvette show in Canfield, etc. Once spring gets here and the roads are dry, I'll drive over that way and meet you in the middle somewhere. We can have coffee and I'll hook the scanner on your car and see what we can see. I don't know what all yours will report, but at least we can look for codes and anything else it will tell us.
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Old 02-23-2019, 07:51 AM
  #59  
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Originally Posted by drcook View Post
We go over that way quite often. To the fair, occasionally a Corvette show in Canfield, etc. Once spring gets here and the roads are dry, I'll drive over that way and meet you in the middle somewhere. We can have coffee and I'll hook the scanner on your car and see what we can see. I don't know what all yours will report, but at least we can look for codes and anything else it will tell us.
Sounds good. Yea i live right in the middle of canfield
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Old 02-23-2019, 07:55 AM
  #60  
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