shitbox hilux Posted October 15, 2014 Report Share Posted October 15, 2014 Hi, i am trying to fix a friends 2003 3RZE Hiluxthe car runs ok on LPG but on petrol very rich black smoke out of the exhaustat idle it runs a bit roughwhen you rev it to about 2500 it starts to hunt severely down to about 2000 and then quikly back up to 2500its showing no codesECU is fineFuel pressure fineAir mas sensor fineTPS fineCoolent sensor finenew leeds plugsa friend told me it could be the fuel pressure regulator but that seems okanother friend said maybe throttle body could have warped after it backfired realy badly and burnt the old air mass sensormaybe blocked injectorsHas anyone had this problemits driving me mad Many thanks Bluey Quote Link to comment Share on other sites More sharing options...
Clubber997 Posted October 15, 2014 Report Share Posted October 15, 2014 I've never had this problem, but I'm just throwing a couple of ideas around. Has it had a LPG conversion? If so, it probably shouldn't be running on petrol at all... If you're sure its not a sensor, has the ECU been intercepted/reprogrammed for LPG? Is it running a different cam, or different injectors for LPG? Are all filters fine, and is the fuel pressure ok? (It might be too high because of a restriction on the return line, if it has one). Anyway, let me know how you go. Quote Link to comment Share on other sites More sharing options...
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