2003 Isuzu Rodeo Repair Question
2003 Isuzu Rodeo Question Trouble codes P0172 & P0175
I have put some injector cleaner in and purchased some mass air flow sensor cleaner. I am looking for a diagram of the vacuum lines so I can check those for leaks, Is there one available i can't find one in the book.
This is what is available, but vacuum diagram is on a label under the hood...get a can of spray Throttle body cleaner, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!
P0172 and P0175 are not likley due to vacuum leaks, these are bank one and two running rich, too much fuel, not enogh air...air filter ok? No blockages in the air intake? Check fuel pressure regulator, pull the vacuum line off, is there any fuel in that line? If yes replace the regulator. Check fuel return line for any restrictions.
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