Help! Car keeps throwing P0106 and P0300 codes!
Thread Starter
Safety Car
Joined: May 2002
Posts: 3,615
Likes: 2
From: waterloo ontario
St. Jude Donor '08
Help! Car keeps throwing P0106 and P0300 codes!
I just had a new clutch and some 3.90's installed and since the install my car keeps throwing a P0106( map sensor out of range)and now a P0300 multiple missfire code. My car is tuned with edit which I had done myself. I have a cam 228/230 .571/.573 112 and had this cam all last year and no codes. I changed all the values in edit to avoid the misfire codes but for some reason I keep getting them-but only since my clutch and diff has ben installed. I'm wondering if any vacuum hose or the map sensor was damaged during the install? I know I had to raise the engine when I installed my Kooks but I checked and made sure nothing was out of wack. I'm just wondering when the motor tilted when they did the clutch and diff swap if something was moved or line got pinched or something? Anyhelp would be appreciated!
Melting Slicks
Joined: May 2001
Posts: 2,456
Likes: 8
From: Cockeysville Maryland
Cruise-In IV Veteran
Daytona Jam 1 Veteran
If I am not mistaken these two codes were edited out for me when my heads and cam were installed a couple of years ago. I know for sure the misfire code was one of two that would keep displaying if they were not programmed out of the computer somehow.
Contact one of the forum vendors like Chris at ECS thay will be able to provide an accurate response.
Contact one of the forum vendors like Chris at ECS thay will be able to provide an accurate response.
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
I got the same codes on my car when I had a broken valvespring. The car was running fine then one time when I started it, it sounded a little rough at first then smoothed out so I pulled the valvecovers to have a look and saw a spring broken on the #7 cylinder
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Thread Starter
Safety Car
Joined: May 2002
Posts: 3,615
Likes: 2
From: waterloo ontario
St. Jude Donor '08
U know what-I was thinking about the valvesprings. I've changed plugs, wires everything I can think of. Thanks Kh24, I think it's worth the effort to pull the valvesprings and take a look.
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
A couple of quicks shot in the dark. When a friend and I changed the clutch in his car, his airbridge got messed up. The airbridge buckled inwards underneath and there was a hole you could put your pinky in but it was underneath so you couldn't see it. I'm also wondering if your headers are tight. There is also a big fat harness that runs up top from behind the engine, down the bell housing and along the torque tube. It has a strong desire to wedge itself between the torque tube and the bell housing when you are connecting the two. Just some suggestions from our experience. 
Safety Car
Joined: Mar 2002
Posts: 4,928
Likes: 1
Cruise-In V Veteran
St. Jude Donor '09
For the P106 codes and big cams...read this thread. Some good info.
NoGo is THE MAN !
http://www.ls1tech.com/forums/showthread.php?t=139811
NoGo is THE MAN !
http://www.ls1tech.com/forums/showthread.php?t=139811
Thread Starter
Safety Car
Joined: May 2002
Posts: 3,615
Likes: 2
From: waterloo ontario
St. Jude Donor '08
Thanks bink but I talked to NoGo already, my cam is a 228/230 .571/.573 on a 112 so if falls under the 230+ cams. I'm going to pull the valvesprings and then next week the clutch and the gears are coming out-hopefully then we can check the harness that sits near the bellhousing.
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
How is your car running?
I take it the engine is running rough, and if the clutch was changed then the engine was tilted back, so you need to probably pull the intake and check the MAP sensor and connector.
I'm willing to bet since you drove this car for a year with no codes that it's related to the clutch swap
I take it the engine is running rough, and if the clutch was changed then the engine was tilted back, so you need to probably pull the intake and check the MAP sensor and connector.
I'm willing to bet since you drove this car for a year with no codes that it's related to the clutch swap
Thread Starter
Safety Car
Joined: May 2002
Posts: 3,615
Likes: 2
From: waterloo ontario
St. Jude Donor '08
I checked the valvesrpings and they are all good. I think I will just pull the intake and take a look at the map and harness behind the intake. For some reason I cannot get my autotap to work so it's really hard to see what the mapsensor is doing and where the misfires came from.
Heel & Toe
Joined: Jan 2018
Posts: 17
Likes: 0
From: C.G. Az.
2002 Base Model w/ Automatic P0106 - P0300codes
I just had a new clutch and some 3.90's installed and since the install my car keeps throwing a P0106( map sensor out of range)and now a P0300 multiple missfire code. My car is tuned with edit which I had done myself. I have a cam 228/230 .571/.573 112 and had this cam all last year and no codes. I changed all the values in edit to avoid the misfire codes but for some reason I keep getting them-but only since my clutch and diff has ben installed. I'm wondering if any vacuum hose or the map sensor was damaged during the install? I know I had to raise the engine when I installed my Kooks but I checked and made sure nothing was out of wack. I'm just wondering when the motor tilted when they did the clutch and diff swap if something was moved or line got pinched or something? Anyhelp would be appreciated!
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,564
Likes: 4,034
From: Cape Coral, Florida
Do you own a scan tool to maybe look at your fuel trims in ref to the P0300 misfire??...if you don't own one get prepared to fire the parts cannon !!...since the clutch was changed my direction for diagnosis would go that way !!...a vacuum leak would skew your MAP sensor reading and then you get the P0106. I could give you direction for diagnosis if it was JUST the P0106...I could name 10 things off the top of my head that would throw a P0300 but as you know 99.9% of DIY'ers go for the plugs and wires. For me a P0300 diagnosis is always 4 things...cam/crank, fuel, ignition and compression. I think you would actually save money taking it to a shop than possibly replacing $2,000 in parts...for now look for anything that was disturbed during the clutch install. I'll include 2 pictures I took with key KOEO and engine running so you can see what you would and should be looking at for a MAP sensor issue...Baro and MAP psi should be the same with engine off...a dirty throttle body can throw a P0106...The PCM calculates a MAP reading based on throttle postion and engine speed. In the picture a clean throttle body should be below 10% with engine running
