Check engine light
Thread Starter
Cruising
Joined: Jul 2010
Posts: 12
Likes: 0
From: San Jose CA
Check engine light
I have a problem i need som help with.
I put and Vararam intake on my corvette and i hade no problems at all with it. Drove for about 3 weeks and then i got it tuned on a dyno. The day after the chek engine light comes on saying P0327. I know it the front knock sensor. So i hade the car tested with a guy how knows and he replaced them, but i still have the same problem. I have seen a few people, but so fare know one seem to knows what is wrong. Could someone please help me!
Thanks M
I put and Vararam intake on my corvette and i hade no problems at all with it. Drove for about 3 weeks and then i got it tuned on a dyno. The day after the chek engine light comes on saying P0327. I know it the front knock sensor. So i hade the car tested with a guy how knows and he replaced them, but i still have the same problem. I have seen a few people, but so fare know one seem to knows what is wrong. Could someone please help me!
Thanks M
Pro
Joined: Mar 2006
Posts: 583
Likes: 0
From: OKC OK
The intake may have been off of the engine at some point in it's life, and the KS harness got pinched. I have seen it happen and not short out until months or years later. Did he check the harness when he replaced the sensor?
Race Director
Joined: Oct 2000
Posts: 14,063
Likes: 1,166
From: N. Alabama
Also, I believe it is critical to not torque sensor too much. I believe something like 13# at least on my C4. Not saying this is the problem with the new one, just something to look into.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Thread Starter
Cruising
Joined: Jul 2010
Posts: 12
Likes: 0
From: San Jose CA
Sorry for not answerinng you back. I have been away. Well i do have a garage do my own work in and evev if i did i would not know what to do (no very little about whats under the hood on a corvette).
The harness has been replaced, however that did not solve the problems with the front knock sensor. By now i dont know what to do. Any one who has an idea of what would be a smart thing to do?
M
The harness has been replaced, however that did not solve the problems with the front knock sensor. By now i dont know what to do. Any one who has an idea of what would be a smart thing to do?
M
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Quite often with mods the knock sensors will pick up NEW noises it hasn't heard before--- LT headers for one will always cause "false knock codes as the csat iron manifolds deaden alot ot the noise
A CAI will also make new noises--A Varraram as well--It opens up the intake tract and the plastic coverings are thinner and the semsors will pick up new noises--- Most always these noises will cause "false knock"
OR will make noises the sensors haven't heard before and you'll get codes saying the data it's getting is out of range for stock configuration--
YOU can de-senstize the knock sensors-- with a full tuner--
to compensate for these new noises---By adding to the "knck sensor frequecy and knock sensor sensitivity" tables-- just a little at a time til the codes don't come back-- start by going to the next higher # on the table
These tables are found in the "nkock sensor Hardware " section--
Futher adjustments can also be made in the "knock sensor software tables using the "cylinder mode" section"
PS: be careful to not go too far and listen carfully for some audible pinging---Someimes it can be a fine line from getting rid of false codes and creating some real detonation--Sorry to say trial and error is the only method----
A CAI will also make new noises--A Varraram as well--It opens up the intake tract and the plastic coverings are thinner and the semsors will pick up new noises--- Most always these noises will cause "false knock"
OR will make noises the sensors haven't heard before and you'll get codes saying the data it's getting is out of range for stock configuration--
YOU can de-senstize the knock sensors-- with a full tuner--
to compensate for these new noises---By adding to the "knck sensor frequecy and knock sensor sensitivity" tables-- just a little at a time til the codes don't come back-- start by going to the next higher # on the table
These tables are found in the "nkock sensor Hardware " section--
Futher adjustments can also be made in the "knock sensor software tables using the "cylinder mode" section"
PS: be careful to not go too far and listen carfully for some audible pinging---Someimes it can be a fine line from getting rid of false codes and creating some real detonation--Sorry to say trial and error is the only method----
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
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
Thread Starter
Cruising
Joined: Jul 2010
Posts: 12
Likes: 0
From: San Jose CA
Hi tblu92!
I dont have a garage or a place to do any testing or work in. I have to trust the shop i turn to for help. Would a tuner shope be able to help me or should i turn to the chevy delars garage in order to de-senstize the knock sensors?
M
I dont have a garage or a place to do any testing or work in. I have to trust the shop i turn to for help. Would a tuner shope be able to help me or should i turn to the chevy delars garage in order to de-senstize the knock sensors?
M
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
A dealer will NOT mess with the stock program--You need to go to a tuner that has either EFILIVE or HPTuners---software--Not a repair shop---- Tuning capabilities are usually found in a hi-performance shop or a corvette specialty store--
Thread Starter
Cruising
Joined: Jul 2010
Posts: 12
Likes: 0
From: San Jose CA
Hi! I decided to put back the "stock tune" to the engine, rather then take the risk
the engine broke down. I was told that it was a pre-ignation that was the resan for
the knock sensor to react.
M
the engine broke down. I was told that it was a pre-ignation that was the resan for
the knock sensor to react.
M
