Philadelphia Car Meets
Anyone ever been to one of these, looks wild. At first I thought it was a SoCal thing, then I noticed it's in PA. Carlisle Performance and Style Event
I don't want to mention names in case it's a problem, but I'm helping a member retune his car after having some bad boost leaks and other stuff fixed. He's getting a weird stumble around 2000 RPM and it's running poorly. I had updated him to a tephra rom, and at first though that was the problem, but not anymore. I initially missed his lean spool settings, but even after porting that over the problem still persisted. The first thing I noticed was his fuel trims were maxed out at 100% and 59% for short and mid. I assumed at first that his injectors weren't scaled correctly but now all of a sudden the trims are zeroing out. Looking at his latest log the O2 sensor just goes to 0 at random points and hangs there while his WB shows him lean out to ridiculous levels 59.1 came up on the log. Then it starts working like normal. I'm thinking a bad O2 sensor. He also just started getting a no activity code I think yesterday. Any suggestions on what else it could be?
He said it did this stuff for a few weeks before the rom, but it got worse with the tephra. I didn't know he had an issue before I started tweaking the map a bit. I should have made sure it was running 100% first. ran that rom in the VIII version for over a year without a hitch so I don't think it's the tephra exactly.
I always thought they maxed at 30 , but his were reading 100% and 59% which was surprising. Now though, it's coming up much closer to 0 within a respectable range. I think something like -2 and 12%. I had just assumed initially that he had his injectors scaled incorrectly so I tried a different scaling and latency but it made no change. We went back to his original settings, he reset the ECU and now it's fine. It's got me perplexed a bit. I'm guessing a bad O2 because it's all happening under closed loop. It'll drive fine for a few minutes, then it starts with the stumbling. That's why I'm thinking O2 sensor heating up and faulting out.
This was supposed to be a simple richen up a bit and smooth out. Just some minor tweaks and I decided to add the tephra for the knock light because I was in there already. I didn't expect it to be this in depth, but it's kind of fun to diagnose.
He's updating EVOscan in case there's a problem there. I'll make sure he has the injector scaling set correctly in it just in case that's the issue with the fuel trims readings.
I always thought they maxed at 30 , but his were reading 100% and 59% which was surprising. Now though, it's coming up much closer to 0 within a respectable range. I think something like -2 and 12%. I had just assumed initially that he had his injectors scaled incorrectly so I tried a different scaling and latency but it made no change. We went back to his original settings, he reset the ECU and now it's fine. It's got me perplexed a bit. I'm guessing a bad O2 because it's all happening under closed loop. It'll drive fine for a few minutes, then it starts with the stumbling. That's why I'm thinking O2 sensor heating up and faulting out.
This was supposed to be a simple richen up a bit and smooth out. Just some minor tweaks and I decided to add the tephra for the knock light because I was in there already. I didn't expect it to be this in depth, but it's kind of fun to diagnose.
He's updating EVOscan in case there's a problem there. I'll make sure he has the injector scaling set correctly in it just in case that's the issue with the fuel trims readings.
Last edited by colonelfox; Jan 10, 2010 at 10:58 AM.
Anyone ever been to one of these, looks wild. At first I thought it was a SoCal thing, then I noticed it's in PA. Carlisle Performance and Style Event
Anyone ever been to one of these, looks wild. At first I thought it was a SoCal thing, then I noticed it's in PA. Carlisle Performance and Style Event
I just did a ricer upgrade and put on a greddy type RS bov I've been sitting for a while. so far I like how it sounds, no problems driving either but I haven't done a boost leak test to see if its holding like it should...
why recirc? it seemed like it was running fine that time I drove it, besides I loved the vta sound.
I just did a ricer upgrade and put on a greddy type RS bov I've been sitting for a while. so far I like how it sounds, no problems driving either but I haven't done a boost leak test to see if its holding like it should...
I just did a ricer upgrade and put on a greddy type RS bov I've been sitting for a while. so far I like how it sounds, no problems driving either but I haven't done a boost leak test to see if its holding like it should...
why recirc? it seemed like it was running fine that time I drove it, besides I loved the vta sound.
I just did a ricer upgrade and put on a greddy type RS bov I've been sitting for a while. so far I like how it sounds, no problems driving either but I haven't done a boost leak test to see if its holding like it should...
I just did a ricer upgrade and put on a greddy type RS bov I've been sitting for a while. so far I like how it sounds, no problems driving either but I haven't done a boost leak test to see if its holding like it should...
I'm actually heading up there in just a few, I'm going to a viewing for a family member of one of my guys.
Morning gents, just got out the docs office and heading back to get changed for a meeting in west chester. Dan I keep forgetting to tell doc boon I no u haha. Sounds like ur job is way to much time driving, at least u got a sweet evo!
Today is full of meetings and maybe a lil target practice. Wâþs everyone up to? And really chu u gapped urs at .27? I went down to .24 esp bc of the cold.
Today is full of meetings and maybe a lil target practice. Wâþs everyone up to? And really chu u gapped urs at .27? I went down to .24 esp bc of the cold.
btw ryan i figured you'd be interested in an updated picture of the dog since you like them so much. he just recently stopped eating so i have to bring him to the vet tonight. he gained 33 pounds in 2 months.







