Weird Fuel cut problem (Very Unusual)

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Xxmarcusrxx
 

Posts: 9
Joined: Sun Nov 04, 2012 9:35 am

Weird Fuel cut problem (Very Unusual)

Post by Xxmarcusrxx »

So basically when I'm pulling in WOT, the injector latency will drop to 2% randomly. I happens usually when i start at a low speed and do a WOT pull in third gear. It almost never happens when i do a pull starting in second or first ( i can do through all the gears without a hiccup). Here's my tune and logs of the problem.

rb25det neo
fmic
blowthrough setup
Q45 TB


I've got a couple fault codes:

both of the throttle codes from swapping to q45 TB
primary ignition fault
boost sensor fault
Attachments
second & third gear pull.csv
this is the second to third gear pull without any problems
(29.21 KiB) Downloaded 120 times
Fuel cut problem 3rd gear.csv
(29.75 KiB) Downloaded 67 times
10psi.bin
(64 KiB) Downloaded 77 times
Matt
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Location: Adelaide, Australia
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Re: Weird Fuel cut problem (Very Unusual)

Post by Matt »

Change boost limit TTP/TP counter values to 255 and see how that goes

Disconnected boost sensor is probably triggering the early cut
hardknox
 

Posts: 1
Joined: Thu Apr 03, 2014 5:19 am

Re: Weird Fuel cut problem (Very Unusual)

Post by hardknox »

I found this thread while researching a similar issue. My rb25det would hit a rev limit like fuel cut at 5900rpm and would then keep pulling. My lack of boost solenoid was part of the issue, we maxed the tp tables as Matt said ^. After some more hair pulling my tuner figured out that since my speedo is not hooked up, the ecu was hitting a speed related tp limit in one of the tables. He maxed said table out and the problem was completely resolved.

I hope this helps anyone with a similar issue.
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