MY ROD GOT OUT Member 434 Member For: 14y 3m 9d Posted 31/07/13 10:56 AM Share Posted 31/07/13 10:56 AM hey guys, most would know I changed my wrecked bf motor for an fg long. problem im having is car has a strange idle. sounds like a lumpy cam but when you look at the instant fuel usage it sits at like 3.1lt to 3.2lt !! opposed to around 1.7lt to 1.9lt. tuner couldnt find an issue as fuel trims etc are all ok. we are thinking its the map sensor playing up as its the same one that was in my bf when it went bang maybe causing it damage........ anyone heard of this issue before??also when coasting car is pretty jerky as well. other than this the car is boosting properly and is fine on fuel use etc. Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 16d Gender: Male Location: @ my laptop Posted 31/07/13 11:57 AM Share Posted 31/07/13 11:57 AM what injectors? Link to comment Share on other sites More sharing options...
Turkey91 Member 57 Member For: 12y 3m 23d Posted 31/07/13 12:04 PM Share Posted 31/07/13 12:04 PM Inlet manifold gasket leak perhaps. My car used to have a really lumpy idle on cold starts. Progressively got worse. Replaced the gasket (which had broken completely) and all good. Same thing on a mates non turbo ba to. Twice also while this problem was happening it would idle lumpy and really really rich to the point black smoke was coming out the exhaust. Only happened twice. And stopped after idle smoothed out. Never happened again since though. Gasket is cheap. Changing it is a complete sh*t job though Sent from my GT-I9305T using Tapatalk 4 Beta Link to comment Share on other sites More sharing options...
MY ROD GOT OUT Member 434 Member For: 14y 3m 9d Posted 31/07/13 08:55 PM Author Share Posted 31/07/13 08:55 PM Ratter : 60lb dekas approx 30,000km old, maybe they are dirty???Turkey: mate all new gaskets as it was an engine swap, we both sprayed all around edges etc and didn't find anything. Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 16d Gender: Male Location: @ my laptop Posted 31/07/13 11:10 PM Share Posted 31/07/13 11:10 PM could be an fuel system issue or tuning issue, correct diagnosis needs to be carried out Link to comment Share on other sites More sharing options...
MY ROD GOT OUT Member 434 Member For: 14y 3m 9d Posted 01/08/13 12:31 AM Author Share Posted 01/08/13 12:31 AM Yeh my tuner tried to raise idle etc to calm the idle but had no success (masked it slightly). Thinking map sensor got damaged when motor blew or maybe dirty injector as oil went everywhere. Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 16d Gender: Male Location: @ my laptop Posted 01/08/13 12:38 AM Share Posted 01/08/13 12:38 AM map sensor would show in the data Link to comment Share on other sites More sharing options...
MY ROD GOT OUT Member 434 Member For: 14y 3m 9d Posted 01/08/13 03:31 AM Author Share Posted 01/08/13 03:31 AM Yeh didn't throw code relating to that, only rich code. What would be your next idea to data log? Link to comment Share on other sites More sharing options...
wombatG6ET Bronze Donating Members 707 Member For: 12y 6m 1d Gender: Male Location: cherrybrook Posted 01/08/13 04:18 AM Share Posted 01/08/13 04:18 AM Having similar problem today, idle's like it got a huge cam, put it gear and the car starts to jump forward with the revs New injectors went in today and a tune, but still doing it we can't find any air leaks, no codes Link to comment Share on other sites More sharing options...
XR6T PIG Member 54 Member For: 12y 6m 14d Gender: Male Location: sunny coast Posted 01/08/13 09:23 AM Share Posted 01/08/13 09:23 AM I cleaned the boost solenoid and throttle body now mines runnin rough Link to comment Share on other sites More sharing options...
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