Problem after Long Tube Header install.
Thread Starter
Navigator
Joined: Nov 2007
Posts: 10
Likes: 0
Problem after Long Tube Header install.
I just installed JBA Long Tube Headers. I changed out the stock Cats for high flow cats. I already have Corsa X-Pipe and Billy Boat exhaust system. It took a while and it was a bear to get everything hooked up correctly. First start up was awesome!! I crawled under to check for leaks, etc. All was fine.
My problem is as follows: "Check Engine" light stays on when running. I rechecked all four 02 Sensors, they are correctly hooked up. When running, temp gauge on DIC shows: "Coolant temp: XXX", and my analog gauge rolls over to max temp: 260 deg. When I cut engine, with acc on,
both indicators show correct readings (174F).
Anyone have a clue?
My problem is as follows: "Check Engine" light stays on when running. I rechecked all four 02 Sensors, they are correctly hooked up. When running, temp gauge on DIC shows: "Coolant temp: XXX", and my analog gauge rolls over to max temp: 260 deg. When I cut engine, with acc on,
both indicators show correct readings (174F).
Anyone have a clue?
Drifting
Joined: Jan 2012
Posts: 1,341
Likes: 8
From: Hopatcong New Jersey
Pull your codes, I'd be willing to bet you have a P0420/P0430 code for the rear O2 sensors because of the high flow cats.
Also, check the connector/wires for the coolant temp sensor, it's located between the alternator and cylinder 1's exhaust bank, good chance you damaged/disconnected it while installing the headers.
Also, check the connector/wires for the coolant temp sensor, it's located between the alternator and cylinder 1's exhaust bank, good chance you damaged/disconnected it while installing the headers.
Last edited by dblerman; Apr 29, 2013 at 06:10 PM.
Racer
Joined: Jul 2008
Posts: 293
Likes: 8
From: South Bend IN
Pull your codes, I'd be willing to bet you have a P0420/P0430 code for the rear O2 sensors because of the high flow cats.
Also, check the connector/wires for the coolant temp sensor, it's located between the alternator and cylinder 1's exhaust bank, good chance you damaged/disconnected it while installing the headers.
Also, check the connector/wires for the coolant temp sensor, it's located between the alternator and cylinder 1's exhaust bank, good chance you damaged/disconnected it while installing the headers.
He's probably right about the temperature sensor too. When I remove and install my headers for any reason I remove the plugs and this sensor since they are the main things that can break should the headers get caught on them - I mostly think it's the weight of the headers accidentally resting on them that causes them to crack and go bad. AFAIK this sensor is pretty cheap.
Kurt
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
I'd also check the grounds on the engine block and frame that you likely disconnected when you installed the headers. Or else you possibly buggered up something else in the wiring. Also, look up how to pull the codes with the DIC so you can figure out what is actually causing the CEL.
Also, headers and high flow cats does not mean you must turn-off the rear O2 sensors. I've been running them active for 2 seasons without a code..
Also, headers and high flow cats does not mean you must turn-off the rear O2 sensors. I've been running them active for 2 seasons without a code..
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
I've never had to tune out the rear sensors with hi-flow cats.
I'll bet dollars to donuts its his fronts that are throwing codes.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Race Director
Joined: Feb 2013
Posts: 19,864
Likes: 146
From: South East TN
you can pull codes right off your car without any special code readers. Press options button and hold while pressing fuel button 4 times quickly. The car will go into diagnostics mode it will list your codes followed by an H or C or both. H = History, C= Current. Write all the codes down including the H and C and post them here. I'm sure someone can help you if you get those posted. At least it will be a start.
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
