Quote:
Originally Posted by Penguin
Well, visual inspection is the first way.
The second way is to spray something near the leak that will get sucked into the leak and change the engine RPM or sound. Some people have used an UNLIT propane torch for this; however, I typically use carb cleaner or some WD-40 spray. WD-40 spray is less likely to mar or damage any plastic parts.
You spray the WD-40 where you suspect there may be a vacuum leak, and if there is one there, it will suck some WD-40 in and the engine RPM will change.
Do a Google on "automotive vacuum leak diagnosis" and you'll get a lot of links.
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Thanks, yeah a guy at work told me to be careful with carb spray it can ignite? SO I will stick to WD-40 which i have readily available already. Another guy told me at work that the Fuel Rail Sensor code could be a sign of fuel pump failure or something of that nature...
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2003 BMW E53 X5 4.4i - M62 engine (Non Sport with Premium and Cold Weather Package)
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