Probably not, provided the person didn't drench the actual sensor element in PB. Typically, the exterior threads and boss are soaked in PB to faciliate removal. That said, even if you got some on there, it would likely burn off very quickly. O2 sensors are pretty good at cleaning themselves and are also good at alerting you if there is an issue via OBDII codes. No code, no problem.
can pb blaster ruin an O2 sensor?
i might have hit a couple of my O2's (bottom side) with over spray from pb blaster while changing my downpipes. can this ruin an O2 sensor?
having fuel trim issues while tuning and wondering if an O2 could be the source of the problem.
thanks all
having fuel trim issues while tuning and wondering if an O2 could be the source of the problem.
thanks all
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well i was the person that changed them. i'm sure some got on the sensor side. and it did throw 420 and 430 but i assumed that was just due to lack of cats in the DPs. is there a way to verify that the O2's are working? should they read some certain voltage (or range) if they're ok? might not be the problem at all, but just looking at the things that are new on the car that could be the source of the issue. cobb is working on it right now so i know it's in good hands. just trying to do my own research.
thanks
thanks
What kind of fuel trim issues? can you explain more?having fuel trim issues while tuning
thanks all
cobb states "The car still has larger than desired fuel trims and injector duty cycle at higher RPM and high load". upon googling fuel trim info i saw a reference to bad o2 sensors. so, this is why i'm curious if it could have any connection.What kind of fuel trim issues? can you explain more?
If its going lean at certain banks or both banks at high rpm and high load + you have changed injectors (which requires you to remove the intake manifold collector) there could be a vacuum leak.. vacuum leaks in intake manifold and/or intake manifold collector can cause lean condition at high rpm and high load.
Make sure you use new gaskets when reinstalling intake manifolds and do tolerance check on the intake manifold too.. check for distortion - must not be greater than 0.1mm
Make sure you use new gaskets when reinstalling intake manifolds and do tolerance check on the intake manifold too.. check for distortion - must not be greater than 0.1mm
id1000's and walbro 255's were installed the day before the tuning
thanks for the suggestions
thanks for the suggestions
btw they have already tried two sets of 255 pumps and even tried a set of 300's with no luck. so looking at other parts in the fueling system now.
4020 and 4030 codes relate to the downstream sensors/cat efficiency and have no impact on engine operation. They can quickly be disabled with a professional tune. As far as the trims are concerned, if there is a bank to bank imbalance I would look for leaks. If they is no imbalance, it may be tuning..but probably NOT in this case. You mentioned Cobb reported that there are higher than normal duty cycles at high RPM. I can almost guarantee that your issue lies in the fuel pump assembly when the twin walbros were installed. Pull the assembly and check to make certain the pumps are properly seated, no pinched o-rings and the pumps are stable. You really have to take extreme care to get the alignement and security right with those pumps. If they arent well seated, they will leak pressure. I've seen a bunch of weird acting (strange trims, high DC's) GT-R's come through our shop, and in each case it was the fuel pump assembly.id1000's and walbro 255's were installed the day before the tuning
thanks for the suggestions
They mentioned maybe pulling the assembly from tim's car to try in mine. They have already tried a few sets of pumps and replaced orings. So it seems that the pumps themselves are fine. Not sure what else could be bad on the assembly side of it.
Try again, the problem lines in that assembly. The racing fuel trims tells the story of rapidly dropping fuel pressure.They mentioned maybe pulling the assembly from tim's car to try in mine. They have already tried a few sets of pumps and replaced orings. So it seems that the pumps themselves are fine. Not sure what else could be bad on the assembly side of it.
PM me.they popped the entire walbro modded assembly from tim's car into my car and they state it runs perfect. so it comes back to something in my assembly it seems.
looks likely that i'll be paying for a new one at $1k![]()
turns out the replacement fuel pump assembly was not the fix. so they think the issue must be in a fuel line or pressure regulator.
1 - 14 of 14 Posts
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