Looking for vacuum leak
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Looking for vacuum leak
I have done everything. E150 4.2. Pulled plugs and 5 & 6 look like they are running rich. Code 0175 (bank 2 rich) comes up at low rpm and just starting to move. Truck will stall alot at idle. High speeds the truck runs fine. I have visually looked at all vacuum lines and as far as I can see. they are old but fine. Is there a way to check for a leak other than replacing all of the lines.
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Do you mean leaking into the cylinder, and if so how would I check. Again it appears to be in the 5 & 6 cylinder. the engine has been rebuilt about 17,000 miles ago. I have cleaned or replaced just about everything and have also been running injector cleaner through it periodically.
How would I check the injectors and can I pull them without pulling the upper intake
How would I check the injectors and can I pull them without pulling the upper intake
Senior User
Joined: Mar 2005
Posts: 352
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From: uk
hi, to get to the injectors its the intake off first before you can see the fuel rail etc.
i wish i new a way of checking for vacuum leaks there must be a spray available. i have read other posts that refer to using propane but that seems extream to me. bokker.
i wish i new a way of checking for vacuum leaks there must be a spray available. i have read other posts that refer to using propane but that seems extream to me. bokker.
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I did check for vacume leaks with both propane and carb cleaner. I did not notice any change in the idle so I will assume that there are no leaks.
Is there any thing else other than the injector which will cause #5 and 6 to be rich.
Is there any thing else other than the injector which will cause #5 and 6 to be rich.
Senior User
Joined: Mar 2005
Posts: 352
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From: uk
hi, check the vacuum 90 degree boot that is underneath the intake manifold and the pipe goes to the rocker cover at the pasenger side. these have a habit of disintigrating.
also these engines are critical in regards to spark plugs and more-so plug leads. good luck bokker.
also these engines are critical in regards to spark plugs and more-so plug leads. good luck bokker.
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