The disappearing problem
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
The disappearing problem
I've posted about this. Take a trip, throw an egr code. 2 days later, replace the catback with a Magnaflow. The car runs like crap after that. I mean really bad, bucking, and stalling. I drive it to work 2 days later, still running bad. A guy at work recommends a mechanic who does work on the side. I take it to him on Saturday. The car ran so bad at first I put the flashers on and wasn't sure I'd make it. As we went along it ran better. A 12 mile trip, get it there, hand it over.
So, today I hear that the car has been fine. He can't find a problem with it. I can't tell you how irritating that is. What the heck is going on?
So, today I hear that the car has been fine. He can't find a problem with it. I can't tell you how irritating that is. What the heck is going on?
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
To his credit, he didn't just start replacing things. A dealer definately would have replaced something by now. But, he didn't find anything wrong. I'm going to pick it up tonight, but now I'm really confused.
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
Well from my experience with my car, it doesnt take much to throw these cars out of whack. Plain and simple, the electronic systems on these cars is complete crap.
It sounds like you have an intermittent problem so maybe you should try driving it around with it hooked up to a computer so when it starts running like crap you can see whats happening.
It sounds like you have an intermittent problem so maybe you should try driving it around with it hooked up to a computer so when it starts running like crap you can see whats happening.
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
Well from my experience with my car, it doesnt take much to throw these cars out of whack. Plain and simple, the electronic systems on these cars is complete crap.
It sounds like you have an intermittent problem so maybe you should try driving it around with it hooked up to a computer so when it starts running like crap you can see whats happening.
It sounds like you have an intermittent problem so maybe you should try driving it around with it hooked up to a computer so when it starts running like crap you can see whats happening.
Le Mans Master
Joined: Dec 2002
Posts: 6,715
Likes: 2
From: Santa Teresa New Mexico
Well from my experience with my car, it doesnt take much to throw these cars out of whack. Plain and simple, the electronic systems on these cars is complete crap.
It sounds like you have an intermittent problem so maybe you should try driving it around with it hooked up to a computer so when it starts running like crap you can see whats happening.
It sounds like you have an intermittent problem so maybe you should try driving it around with it hooked up to a computer so when it starts running like crap you can see whats happening.
The code scanners for the old system OBD1 are not very good.
They work and you can't fix an emissions problem without one, but the OBD2 scanners are much simpler to use and they're more accurate in my opinion.
These cars are old, old cars have problems. If you can't fix it yourself eventually the cost of repairs will exceed the value of the car.
It costs the same to have a 07 worked on as it does a 85, 07's are in warranty.
Theres two rules when it comes to owning a car.
1. Pay the bank
2. Pay the mechanic
Buy a manual and a scanner, your wallet and your car will thank you.
Melting Slicks
Joined: Apr 2003
Posts: 3,110
Likes: 6
From: Red Sox Nation! RI
Are you throwing a code 32?
A bad EGR valve, among other things, could give you the symptoms you're having. But you'd have to check it to see if it's stuck, clogged up and capabale of holding vacuum. Not sure if you can get your finger at it without pulling the plenum. Keep in mind a bad EGR valve does Not set off a trouble code.
A bad EGR valve, among other things, could give you the symptoms you're having. But you'd have to check it to see if it's stuck, clogged up and capabale of holding vacuum. Not sure if you can get your finger at it without pulling the plenum. Keep in mind a bad EGR valve does Not set off a trouble code.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Feb 2006
Posts: 2,240
Likes: 0
From: Cleveland OHIO
Your mechanic is a tard, what code did it give you when it was acting up ? He doesn't know how to check an EGR valve and he's a tech 
If you have a code 32 I would test the EGR system first. It may or may not be the EGR though it could be a number of things throwing the code 32 but that is where I would start.
If you have a code 32 I would test the EGR system first. It may or may not be the EGR though it could be a number of things throwing the code 32 but that is where I would start.
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
It runs worst when it's left out in the heat, but hasn't run for a long time. So, the motor isn't hot, but the car is... if that makes sense?
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
Your mechanic is a tard, what code did it give you when it was acting up ? He doesn't know how to check an EGR valve and he's a tech
If you have a code 32 I would test the EGR system first. It may or may not be the EGR though it could be a number of things throwing the code 32 but that is where I would start.
If you have a code 32 I would test the EGR system first. It may or may not be the EGR though it could be a number of things throwing the code 32 but that is where I would start.
He cleaned the TB, checked the injectors, put a scan tool on it, drove it, and it seemed good. I picked it up today, and it's never run better. Go figure. He charged me $25.
He did find one thing, there is a tube for the egr where there is a sensor. There's a wire coming off that sensor, it's broken off. He tried to solder it back on, but it wouldn't hold. Not sure what the sensor does, or if it could be causing this problem.
The good news is the car runs good.
The bad news is I don't quite trust it right now.
Melting Slicks
Joined: Apr 2003
Posts: 3,110
Likes: 6
From: Red Sox Nation! RI
That broken wire is what's triggering your intermittent code 32. I'm assuming that's what you were getting? SES light coming on once the car's warmed up and eventually going off?
It's an EGR temperature sensor. From what I've read on the forum and personal experience, they are notorious for breaking at the porcelean. Just buy a new one, they're cheap. Try Rockauto.com And here's a discount code to boot 697484453749
It's an EGR temperature sensor. From what I've read on the forum and personal experience, they are notorious for breaking at the porcelean. Just buy a new one, they're cheap. Try Rockauto.com And here's a discount code to boot 697484453749
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
That broken wire is what's triggering your intermittent code 32. I'm assuming that's what you were getting? SES light coming on once the car's warmed up and eventually going off?
It's an EGR temperature sensor. From what I've read on the forum and personal experience, they are notorious for breaking at the porcelean. Just buy a new one, they're cheap. Try Rockauto.com And here's a discount code to boot 697484453749
It's an EGR temperature sensor. From what I've read on the forum and personal experience, they are notorious for breaking at the porcelean. Just buy a new one, they're cheap. Try Rockauto.com And here's a discount code to boot 697484453749
Aside from the 32, could the temp sensor cause other problems? Like running like crap?
Melting Slicks
Joined: Apr 2003
Posts: 3,110
Likes: 6
From: Red Sox Nation! RI
No. If I remember correctly, the sensor just reads the temperature of the recirculated ex. gas that runs through that metal tube. It feeds that info back to the ECM. When replacing the sensor, be careful screwing it in so you don't break the porcelean & wire during install.
Burning Brakes
Joined: Nov 2005
Posts: 1,211
Likes: 2
From: Dumas Arkansas
After reading this below a couple of months ago in the testing section they talked about "inspect all passages and moving parts for plugging, sticking and deposits" is when I took a water hose to the egr and cleaned it up. It was very dirty back there and even though I previously had a new egr installed before getting code 32 lately, cleaning the egr with the water hose seemed to clear the code for the meantime. Don't worry I didn't hose the front part of the engine block just the rear end of it back there.
EGR help
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
EGR help
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
No. If I remember correctly, the sensor just reads the temperature of the recirculated ex. gas that runs through that metal tube. It feeds that info back to the ECM. When replacing the sensor, be careful screwing it in so you don't break the porcelean & wire during install.
Melting Slicks
Joined: Apr 2003
Posts: 3,110
Likes: 6
From: Red Sox Nation! RI
Sure. Maybe 10 ft/lbs? It's more of being careful with the wire and insulator.
IMO, I wouldn't really hose down an EGR valve. When they go bad, it's usually a leaky diaphragm or a stuck pintle. External cleaning shouldn't do anything. Though I wouldn't want to take the slim chance of getting water recirculated back into a cylinder.
IMO, I wouldn't really hose down an EGR valve. When they go bad, it's usually a leaky diaphragm or a stuck pintle. External cleaning shouldn't do anything. Though I wouldn't want to take the slim chance of getting water recirculated back into a cylinder.
Pro
Joined: Apr 2006
Posts: 747
Likes: 0
From: Perth Western Australia
That broken wire is what's triggering your intermittent code 32. I'm assuming that's what you were getting? SES light coming on once the car's warmed up and eventually going off?
It's an EGR temperature sensor. From what I've read on the forum and personal experience, they are notorious for breaking at the porcelean. Just buy a new one, they're cheap. Try Rockauto.com And here's a discount code to boot 697484453749
It's an EGR temperature sensor. From what I've read on the forum and personal experience, they are notorious for breaking at the porcelean. Just buy a new one, they're cheap. Try Rockauto.com And here's a discount code to boot 697484453749
Le Mans Master
Joined: Dec 2004
Posts: 5,488
Likes: 1,352
Thread Starter
Drifting
Joined: Dec 2006
Posts: 1,771
Likes: 1
From: Cuyahoga Falls Ohio
Good stuff, I like this line:
After finding out I still had too much money I replaced the ECM.