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Old 11-19-2012, 11:05 AM
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Default 07 G missfire problem (not tubes)

Got a question for anyone that knows.
What is the running fuel psi spec for a 07 Gallardo. (I have 39.5 both banks running 47.0PSI not running)

Vehicle background: 07 Gallardo coupe 4,000 orginal miles (I rebuilt frontend frame and body) Faceplant into wall car.

The reason I ask:
Upon warm up I have: P0302 sometimes- P0308 P0309 (and exhaust back pressure both banks every time) and poping out of exhaust after warm-up at idle. Right cat overheat warning if driven.

To date I have done the following with no change (yes i have cleared codes each time)
- check missfire tubes clear & blown out just incase
- Swap all coils and plugs from L > R bank = no change
- Replaced injector 2,3,8,9 = no change
- Smoked intake and exhaust for leaks
- Checked fuel pressure both banks
- Compression test all cylinders 170-175 (except #2 is 165)
- Put factory cat back exhaust back on = no change

Tonight I will bring my better scantool home and read O2 sensors.
Anyone have any ideas before I start scopeing injectors and coils?

Thanks for any help,
Brad
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Old 11-19-2012, 02:09 PM
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I'm not sure on fuel pressure for the "G", couldn't find the spec in ym shop manual either. For the Murci it is 3.0bar +/- .5bar. Assuming the G runs similar pressure, which I believe it should...your system is operating OK.
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Old 11-19-2012, 07:11 PM
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I think I found the problem...maybe.
I only have continuity to 1 of 2 grounds on the throttle bodies.
Does anyone know where 506L and 506R ground points are?
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