Finally got the new A9L in and figured out why the car had an intermittant miss at part throttle. Ended up having a bad plug but I am glad I did cause I probably wouldn't have found that I also had a crapped out ECU otherwise.
I pulled the following codes.
12 Cannot control RPM during ER self test high rpm check
34 EVP failed above the closed limit of .67
42 No HEGO switching detected always rich (right side)
95 Fuel pump secondary circuit failure
I am pretty square with everything except for the code 42.
For code 12 I probably need to clean or replace the IAC, for 34 I believe that I need to clean or replace the EGR valve (let me know if I am wrong on this one) and for 95 the guy who did the MAF conversion never wired in the fuel pump signal.
Code 42 is my concern. The car does run rich and I have seen some posts in the past on what can cause this other than a bad O2. I would prefer to check before I go throwing parts at it.
I tool FP readings and its 43 with vacuum off and capped and about 39 with the vacuum connected. The FPR is a stocker. The car pulls 12" of vacuum which I think is a little low but it does have an undetermined cam that was put in by the previous owner. I went through with TB cleaner and tried to find any vacuum leaks and couldn't find any.
Where should I be looking next?
Mods to the car are as follows: TFS trackheat intake, 70mm TB and EGR spacer, 76 MM C&L MAF, unknown cam, 3G alternator upgrade, BBK full length headers, O/R H pipe and Dynomax bullets.
I have most of the original parts like TB, MAF etc so I can swap them back on if need be.
I pulled the following codes.
12 Cannot control RPM during ER self test high rpm check
34 EVP failed above the closed limit of .67
42 No HEGO switching detected always rich (right side)
95 Fuel pump secondary circuit failure
I am pretty square with everything except for the code 42.
For code 12 I probably need to clean or replace the IAC, for 34 I believe that I need to clean or replace the EGR valve (let me know if I am wrong on this one) and for 95 the guy who did the MAF conversion never wired in the fuel pump signal.
Code 42 is my concern. The car does run rich and I have seen some posts in the past on what can cause this other than a bad O2. I would prefer to check before I go throwing parts at it.
I tool FP readings and its 43 with vacuum off and capped and about 39 with the vacuum connected. The FPR is a stocker. The car pulls 12" of vacuum which I think is a little low but it does have an undetermined cam that was put in by the previous owner. I went through with TB cleaner and tried to find any vacuum leaks and couldn't find any.
Where should I be looking next?
Mods to the car are as follows: TFS trackheat intake, 70mm TB and EGR spacer, 76 MM C&L MAF, unknown cam, 3G alternator upgrade, BBK full length headers, O/R H pipe and Dynomax bullets.
I have most of the original parts like TB, MAF etc so I can swap them back on if need be.