Help with TB code
Thread Starter
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Help with TB code
I recently installed a P1SC1 supercharger on my H/C car. I have a FAST intake with LS2 TB (may be relevant)
I took the car to get tuned/dyno'd a couple weeks ago, and after a couple of simi-aborted runs , we found I did not have enough fuel pressure (pressure dropping to mid 40s) to continue the tune.
Although we didn't get a chance to tune the car, there was no question it was pulling hard on the dyno until we would shut down each time. (no running problems)
On the way home, I eased hard into the throttle and it "spit/popped" and went into reduced power mode. cleared the code and came on home.
After removeing the fuel pump (and damaging the sending unit which I had to replace) I buttoned everything back up, and went for a test run.
EVERY TIME I roll hard into the throttle to go WOT (probably at the point it is just about to go into boost) it sound like it "pops" back (not loud) through intake and it goes into reduced power.
It gives me a PCM - P1514 (throttle body performance) and TCS - C1278. I clear the codes and it runs, but not sure what it means. It ran strong on the dyno with three WOT runs, so what is going on?
Need help
I took the car to get tuned/dyno'd a couple weeks ago, and after a couple of simi-aborted runs , we found I did not have enough fuel pressure (pressure dropping to mid 40s) to continue the tune.
Although we didn't get a chance to tune the car, there was no question it was pulling hard on the dyno until we would shut down each time. (no running problems)
On the way home, I eased hard into the throttle and it "spit/popped" and went into reduced power mode. cleared the code and came on home.
After removeing the fuel pump (and damaging the sending unit which I had to replace) I buttoned everything back up, and went for a test run.
EVERY TIME I roll hard into the throttle to go WOT (probably at the point it is just about to go into boost) it sound like it "pops" back (not loud) through intake and it goes into reduced power.
It gives me a PCM - P1514 (throttle body performance) and TCS - C1278. I clear the codes and it runs, but not sure what it means. It ran strong on the dyno with three WOT runs, so what is going on?
Need help
Burning Brakes
Joined: Apr 2009
Posts: 946
Likes: 2
If I recall correctly, P1514 is a tps / map mismatch code -- in other words, there is more air here than there should be. Which makes good sense if you are in boost, right?
There is a table that needs to be adjusted to make this stop tripping. Unfortunately, my EFI rig is not easily accessible right now, so I can't look up the name of the table. I don't recall ever setting the other code, but it might be related.
There is a table that needs to be adjusted to make this stop tripping. Unfortunately, my EFI rig is not easily accessible right now, so I can't look up the name of the table. I don't recall ever setting the other code, but it might be related.
