Had some terrible flooding and finally got the engine running by changing the IAC and MAF. Every MAF I try has different result. It still seem to be running rich a little. Can anyone tell me if these numbers are bad. I attached the logs file while running. Every sensor is new and not vacuum leaks and fuel pressure in 41psi.

 

It is a common issue with each MAF responding differently. They just don't get the calibration correct.

As for the log, make sure that there aren't any malfunction flags/codes set.

Both the INT and BLM are low, meaning that the ECM is pulling fuel to correct an rich condition. Or, the O2 sensor is bad and is reporting rich.

The TPS is too low and the IAC steps are too high. Need to do a TPS & IAC reset:

https://www.thirdgen.org/tpimod2/

Not sure if the MAF airflow at 5 gms/sec is correct. I though it was supposed to be a tad higher (6 -7 gms/sec?).

RBob.

 

Thank you for looking!! I will do the reset of both. The O2 sensor is new (AC delco) but I guess it could be off. I do get a 33 and 36 with WINALDL but the engine light is not on. I have some new relays to put on. Its really been a hair puller.

Thank you again!

 

I put the new chip in and ECM today. Replaced the MAF relays and reset the IAC and adjusted the TPS voltage some. Here is the new data.

 

In the snap shot blm and int look good. How is it running still rich ?

 

Not sure its been driving me nuts. Every gasket, seal, injector, sensor and fuel regulator is new. I am having a new fuel pump put in next week anyway and having the lines checked. I have replaced everything on the TPI setup. Was restoring anyway but this has really been a treat... oh and the ECM is new... Timing is dead on with a new distributor. Unless the new 02 sensor is off...

I told the guy at the parts store a couple weeks ago if you see a fire truck headed my way I set it on fire. its actually getting better and your chip is running great.

 

Could the injectors I put in make it run more rich?

Product Line: ACCEL Fuel Injectors
Summit Racing Part Number: ACC-150824


UPC: 743047800348
Injector Advertised Flow Rate (lbs/hr): 24 lbs./hr.
Injector Advertised Flow Rate (cc/min): 255.0cc/min
Injector Impedance: 14.4 ohms

 

The 24s would make it run alittle richer than stock. I’m not sure how much richer if it’s even noticeable or not. I have heard of guys replacing there 22s for 24s without issue or tuning for them. If you can datalog with tunerpro rt I can try to tune for them.

 

http://tunerpro.net
Adx file can be found here
http://www.gearhead-efi.com/Fuel-Inj...Information-6E