New engine keeps throwing MAP sensor code.
Thread Starter
Racer
Joined: Apr 2013
Posts: 253
Likes: 3
New engine keeps throwing MAP sensor code.
I just built the engine for our 2001 Vette. It's a stock cube 346 with Eagle rods, Probe pistons, ported heads, COMP 232-234 / .595"-.598" 112 LSA cam, COMP 850 lifters, stock LS6 intake, ported throttle body, 42# injectors, long tubes, high flow cats, and axle back. I had a mail order tune done, and the car was initially running EXTREMELY rich. I had a friend retune it to get it to idle and stop dumping so much fuel. Now, I keep getting a MAP sensor out of range code. I just changed the MAP sensor and checked the wiring. It's still kicking it a few seconds after starting the car. Manifold vacuum is 12" at idle. Any ideas?
Frank
Frank
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
The MAP reference signal or voltage is a HUGE item that is used thru-out the entire tune file--Both in fuel and spark---
Having the actual code will help narrow down the fix----Looking at your mods I would suspect your injector flow rate table
You can change the parameters that run the MAP tests so they won't run and you'll get no codes however I would make sure that it's running spot on before doing that as you may never get the top performance until you find the actual issue
If you think the car is running to it's full potential then change the parameters in the
"MAP Rationality tests" and the "MAP Predicted min/max " tables so the tests don't run--No tests--no codes !!
Having the actual code will help narrow down the fix----Looking at your mods I would suspect your injector flow rate table
You can change the parameters that run the MAP tests so they won't run and you'll get no codes however I would make sure that it's running spot on before doing that as you may never get the top performance until you find the actual issue
If you think the car is running to it's full potential then change the parameters in the
"MAP Rationality tests" and the "MAP Predicted min/max " tables so the tests don't run--No tests--no codes !!
Thread Starter
Racer
Joined: Apr 2013
Posts: 253
Likes: 3
The code is P0106 "MAP or BARO press ckt out of range". At idle, it measures 19.0 HG at 2.7 volts. I'm using my Snap On scanner to check it. If I clear it while the car is running, it won't come back until I shut the car off and restart it.
Frank
Frank
Burning Brakes
Joined: Jul 2006
Posts: 968
Likes: 12
From: Regina Sask
P0106 is a common code with a cam that raises the idle Map. You need to raise the P0106 Error Map Calculated Max table to be higher than your actual Map pressure vs RPM & Map.
Look at a ZO6 table, should work perfect for your car.
Russ Kemp
Look at a ZO6 table, should work perfect for your car.
Russ Kemp
