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Message: <blockquote data-quote="Bigjoe.45" data-source="post: 1681026" data-attributes="member: 20039"><p>More often than not popping back through the intake is due to a camshaft lobe going flat. The 2300 pinto engine can be bad about this. The timing could indeed be off and cause this to a minor degree. The turbo timing is not the same as the naturally aspirated versions so make sure. Timing belts can be funny things so you may check again yourself. Compression check is the next step if this does not fix the problem but if the cam is going bad on the exhaust side this will not show the problem. It is note worthy that these things spit out head gaskets like a toddler with peas so that is the last check and hopefully not the issue.</p></blockquote><p></p>