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Anthony, ASE Certified Technician
Category: Car
Satisfied Customers: 11751
Experience:  ASE Master Automobile Technician with over 20 years exp.
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98 isuzu rodeo: check engine light..4 codes, p300, p0414, p0420, p0507

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I have a check engine light on, it has 4 codes, p0300, p0414, p0420, p0507 in a 98 isuzu rodeo

HelloCustomer Welcome to justanswer!


Looks like the intake manifold still has a vacuum leak. Id have the intake smoke tested to pinpoint it. Once fixed, reset all the codes and see what comes back. YOu cant really move on with a vacuum leak.

Customer: replied 6 years ago.
how can i smoke test the intake manifold
A shop has to do it. They don't charge much but its 100 percent accurate in finding the leak.
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