So here we are quite a few months since I put on the HSR and EBL and the weather is getting nice here in TN. I finally got to take the Camaro and do some self learns on the EBL with the TT-1 wide band.

The car flat out runs horrible and will not take any throttle. I did about six learns on it and none of them helped. I had one short stretch where it ran and took some throttle input and accelerated normally. I am not stabbing the throttle at all.

I am getting a code 33 and 42. 33 tells me that the map is seeing no vacuum and I can confirm this by my lack of power brakes. Also while driving I noticed the map reading full pressure on what's up display.

Code 42 seems to be related to the ignition module. I have another I can swap but I think I need to get code 33 hammered out first. My coil is not bolted down and is zip tied up to the firewall until I find a way to mount it. Does it perhaps ground through it's mount causing a fault?

I tried to attach the bin and log but it exceeds the size limit even zipped up for the forum.

 

Okay... I am going to assume it ran ok at one time and now it's not.


Has your base timing slipped?

Disconnect the EST wire (brown wire the ECM uses for advance), hook up your timing light, and then make sure you have the correct initial timing. Then ensure your initial SA matches in your BIN.

 

Need to fix the malfunction codes before doing any tuning. For the MAP check that the vacuum (pressure) line between it and the HSR plenum is correct.

Code 42 can be any number of things. EST/BYPASS connector open, broken wire, bad ICM, etc. For an ICM, only use GM AC Delco units. See the EBL Spark Latency thread here for the best one to use.

RBob.