turbo overboost issue - maybe

[abporsche1]

that will be the first thing i check. i plan on spending 1-2 whole days working on the car in a few weeks, but business comes first.

[nynor]

Originally Posted by abporsche1

nynor, your symptoms 1-5 are exactly what i experienced - but - the first time it happened it had the stock exhaust. 2nd time it happened was with LR 3" turbo back w/test pipe. i drove it hard with lots of full throttle for 2.5 days and 1000 miles with no problem. then once it happened it continued for 150 miles. do you have the boost enhancer and have you checked it?

Barry

i don't have a boost enhancer, just the banjo bolt that came with the autothority chips.

Originally Posted by jkb58

These descriptions make me think its something else. But any chance this is a custom mapped set of APE chips? Not a standard off the shelf set of Stage II's? Only reason they would hit OBP would be if the parameter was intentionally left in place by the chip tuner. I have run APE chips (and others) over 16 psig for years w/o issue.

Couple things:

Because of the way the air flow is measured, OBP is typically only triggered at high rpm, and has to be near a full run thru the rev range, as the DME measures airflow over a period of time. It will never trigger in 1st or 2nd gear, and sometimes in 3rd, but it needs to be a long pull in 3rd and it will hit at high rpm. Often it takes until hitting 4th gear for OBP to trigger.

Again, OBP and the KLR are unrelated. So if you are getting a limp mode, definitely check for a blink code. Faulty TPS can cause various fuel delivery problems. Not a KLR fault, but even a failing DME relay can cause stumbling, as the fuel pump kicks in & out.

yeah, fourth/fifth gear, any RPM's as long as it is ~16 lbs PSI.

Originally Posted by abporsche1

that will be the first thing i check. i plan on spending 1-2 whole days working on the car in a few weeks, but business comes first.

i'll check the banjo bolt, also the hose fitting(s) at the CV.

d.

[nynor]

i found that the hose clamp at the wastegate was loose, mainly because whoever put it on last time used one of those worm-screw style clamps. so, i cut the end off of the hose to make sure there wasn't a split as well and put a proper fuel injection hose style clamp on there.

i think the boost was actually reaching the neighborhood of 18PSI.

also, the acceleration seems better, smoother. i think the wastegate may have been fluttering, thus messing with the boost.