Quote: Originally Posted by
kornerboy 
My srt4 has been of the road for bout 3 1/2 months due to crystlizes antifreeze in the water ports to the head. In turn over heating the head maken it warp
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It's nice to bump the thread for others to see, but since the questions aren't related to fuel trims it might be best to start a thread in another section. With that said, I'm not sure what you're talking about that happened to your engine. Was your water-to-coolant mixture off so much that you had pure water and it froze and cracked something or did you run low on coolant, get air in the system, and overheated the car warping the head? Whatever the cause, if you lost a head gasket and the head was warped you probably burned coolant or had some go out the exhaust. The silicate in the coolant will ruin your stock O2 sensors and cause the sensing cell in them to not work correctly. If you didn't change them you probably want to. Stick with the dealer or try to get an NTK sensor (they have a faster switching/response rate than Bosch narrowband O2's).
If you're building boost at partial or low throttle it probably will stay a little lean but should go a lot richer if you're at WOT. If it's that lean under full throttle you've probably got other issues. Since you bought the car used and it's modified and has a possibly cut/damaged wire who knows what else is wrong. The first thing you should do is go over the car with a fine tooth comb and sort out any problems or issues before trying to throw parts at it. If you're not sure what to look for then I'd try to find another knowledgeable owner in your area or a shop that's really experienced with the SRT-4's.
Quote: Originally Posted by
Turbocruiser13 Getting no love in a separate thread...here's the skinny. Big turbo 650 injectors returnline at 46psi static LC-1 wideband SAFCI etc etc etc. At idle the car is 14.7 all day long and lovin it. On the freeway it drops down to 13.8-14.2 and stays there...won't go back up to 14.7 at all. I've gone from pulling 5% in my low throttle settings from 1000-3000rpms to now pulling 20% and there's not one bit of change. Any thoughts?
There's nothing to say that it will
always cruise at 14.7:1 at idle and under light load cruising conditions. Just like if you're watching fuel trims they will always be at zero on a stock car. If you're in closed loop mode at cruise (using the O2 feedback) there's a lot of variables such as the computer's programming, O2 sensor age, other sensor inputs, etc. that will determine how rich or lean it runs. If you haven't free air calibrated your wideband in a while that would also be another thing to verify. And for those who don't have an Innovate or the newer TurboXS wideband's that can be free air calibrated to compensate for sensor age your wideband can be off up to a point or more as they age.
