double overhead sun visors Posted November 4, 2006 Share Posted November 4, 2006 Last Friday night, cruising at about 100Km, pretty neutral boost (approx 2000rpm in 5th) and died in the arse. Motor still starts with a lot of difficult on cold starts, runs rough and idle hunts, no excessive smoke/backfiring. When it went it felt just like it would when an intercooler hose pops off. But they are all fine. Best way to describe it is like a giant torque hole before about 4000rpm, you can put your foot flat & drive through it, then makes power from 4000rpm onwards. About 20mins before it happened it felt like it was missing a bit around 4000rpm when under a slight load. Diagnostic steps taken thus far on the RB26: All hoses were fine – 1 very small vacuum hose was off at the rear of the motor Replaced AFM’s – no probs Replaced CAS (with 3 different ones) – no prob Plugs – fine Compression – fine TPS - fine FC – input sensor volts fine. But timing was out between what the FC thought it was reading/sending & what the timing was actually at the engine. Was more retarded then what the FC thought, FC couldn’t advance the timing. Thought it was the FC, swapped FC with Wolf 3D, seemed to work a little better, but still couldn’t get a satisfactory tune in the Wolf for down low. Reset FC to base tune, after trying to dial in a conservative safe tune it seems to go into ‘limp home mode’ ditching the parameters & puts the engine light on. The AWD light is now coming on too, usually this indicates that the ATTESA has shut down the AWD. Next thing to check maybe inlet manifold gasket.(?) Any ideas? Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/ Share on other sites More sharing options...
double overhead sun visors Posted November 4, 2006 Author Share Posted November 4, 2006 Opps sorry for double post lol.. delete this one pls... Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/#findComment-2641267 Share on other sites More sharing options...
Faid Posted November 5, 2006 Share Posted November 5, 2006 dude it can be a range of problems, id be cheking the trubs, maybe one let go, or it could be your coils, your plugs, as i said a range of problems. have it diagnosed at a professional workshop. Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/#findComment-2642631 Share on other sites More sharing options...
MBS206 Posted November 5, 2006 Share Posted November 5, 2006 Tim's car, as far as I know, has been in at a professional workshop. Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/#findComment-2643138 Share on other sites More sharing options...
TurboX Posted November 5, 2006 Share Posted November 5, 2006 What does the ECU error code functions say? I am having probs not quite the same though and get error 34 - knock sensors (Just replaced!) Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/#findComment-2643166 Share on other sites More sharing options...
double overhead sun visors Posted November 5, 2006 Author Share Posted November 5, 2006 As Matt said it’s at a professional workshop. Don’t think it would be a turbo, no pop/bang when it went, it was also on fairly neutral boost, & it still makes heaps of power above 4000rpm. No diagnostic error’s on the FC, but it wasn’t setting the correct timing… Now engine warning light comes on since resetting the FC. Any other ideas? Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/#findComment-2643522 Share on other sites More sharing options...
SLIPPERY Posted November 5, 2006 Share Posted November 5, 2006 try stock ecu again and see what happens Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/#findComment-2643854 Share on other sites More sharing options...
double overhead sun visors Posted November 6, 2006 Author Share Posted November 6, 2006 Got the wolf 3D to work, no stock ECU anymore, just swapped the stock ECU for an oil cooler... Link to comment https://www.sau.com.au/forums/topic/141767-problem-%E2%80%93-%E2%80%98lil-help-pls-major-torque-loss-below-4000rpm-running-rough-idle-hunting-%E2%80%93-any-ideas/#findComment-2645988 Share on other sites More sharing options...
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