overboost sensor???

[COP TZER]

hey guys....to all those with boost controllers... if we get too greedy and jack the boost a little too much, will we get a CEL??? And what's the highest it'll go before a CEL is flashed??

[Gear_Head]

I believe that this depends how the boost controller is connected. However if the boost goes past 14-15 pounds for 3 seconds or more at anything but WOT it will generate a code. If you are connected at the Waste gate actuator solenoid input (solenoid #2) the PCM will attempt to dump boost by opening the waste gate thus the drop in boost @ 1/2 & 3/4 throttle. The PCM is more leanient at WOT because there is less chance of running too lean w/stock injectors. If you are connected accross the wast gate itself the same reaction by the PCM occours. But there will be no reduction in boost when the PCM tries to open the wastegate and it will throw a code. Knowing this should enable you to maneuver the throttle in day to day driving and help to avoid codes. The Stage I injector flow rates enable you to run higher boost a part throttle without the risk of running too lean, so I believe that the PCM programming was modified to reflect this change. I have ordered the Stage 1 kit specifically for this reason. I won't really be able to run higher boost than I do now with the MBC, but it will run richer @ part throttle and at higher boost without the risk of running too lean. I like the PCM behavior described by stage I users as well. Thats my $ .02 [8D]
Alan