rahman Posted September 2, 2023 Share Posted September 2, 2023 (edited) So my supra. When driving over 40 od minutes, starts to sort of stutter/jerk upto 3k revs. Back ground Recent build, 6 speed big single. Fully built engine and head. Twin Walbro fuel pumps, new fuel lines and filter, new injectors New turbo, mani, oil lines. New large intake etc. Literally everything on the car is New including all vacuum pipes, wastegate, bov. HISTORY This problem was constant until recently which was caused by a bad alternator which I replace a few weeks back. Now it seems to only show symptoms after long periods of driving, like 40 mins plus. I still have the standard viscous fan. And engine bay feels really hot after such drive, auxiliaries to the touch feel hot including the alternator. Feel massive heat wave popping the hood. Any ideas? Could it be fuel getting too hot or because of the poor cooling of auxiliaries? Edited September 2, 2023 by rahman (see edit history) Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted September 2, 2023 Share Posted September 2, 2023 What ECU is this on? Quote Link to comment Share on other sites More sharing options...
rahman Posted September 2, 2023 Author Share Posted September 2, 2023 3 minutes ago, Mike2JZ said: What ECU is this on? Pro efi 128 Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted September 2, 2023 Share Posted September 2, 2023 Hmm ok, can you get a log of It stuttering and send to me. Will take a look Quote Link to comment Share on other sites More sharing options...
rahman Posted September 2, 2023 Author Share Posted September 2, 2023 1 minute ago, Mike2JZ said: Hmm ok, can you get a log of It stuttering and send to me. Will take a look Hmm OK. Problem is I don't have the cable/software. Cable costs around £500. Might have to get one. https://proefi.com/product/bluetooth-logger/ I did find the above blue tooth data logger, do you think this will provide the sufficient data if I install one? Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted September 2, 2023 Share Posted September 2, 2023 Probably best to take it to your tuner and get them to connect and diagnose rather than spending £500 on a cable Quote Link to comment Share on other sites More sharing options...
Scooter Posted September 4, 2023 Share Posted September 4, 2023 Are the coil pack and or connectors new? Quote Link to comment Share on other sites More sharing options...
tony tt Posted September 5, 2023 Share Posted September 5, 2023 7 hours ago, Scooter said: Are the coil pack and or connectors new? That post was 9 years ago. Quote Link to comment Share on other sites More sharing options...
Scooter Posted September 5, 2023 Share Posted September 5, 2023 2 hours ago, tony tt said: That post was 9 years ago. and that post was 2 hours ago, what does it matter? On balance I'd say my post is slightly more helpful to the OP than yours? As you onbviously had a similar issue 9 years ago perhaps you can provide some direct insight, or does it being 9 years ago negate there being any possible relevance? Quote Link to comment Share on other sites More sharing options...
tony tt Posted September 5, 2023 Share Posted September 5, 2023 I’ve got a notification from a post 9 years ago that’s my point. I don’t particularly need to know or get a notification because some has an issue 2 hours ago. It’s of no relevance to include me. Quote Link to comment Share on other sites More sharing options...
Scooter Posted September 5, 2023 Share Posted September 5, 2023 well maybe the mods can sort that out, I think it's automatic, nothing to do with me. Quote Link to comment Share on other sites More sharing options...
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