Ford Ranger Repair Question
Since that vehicle doesnt have an octane shorting bar, i would guess mixture control problem or EGR problem.Either way its probably running lean when warmed up.A new fuel filter and tune up is a basic place to start,but it might require in-depth diagnosis.Could be the fuel pump, coolant sensor, Mass Airflow Maeter, etc
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For what it matters. Ford has a revised MAF sensor or EGR valve for the pinging problem-I don't recall which. They also have an updated computer for the pinging. However, A Ford source tells me that it doesn't always work :?
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I had an issue with my 94 Taurus pinging, all systems checked out, comp was healthy 160 across all cylinders, what I ended up doing was dumping a couple of cans of GM Top Cleaner into the upper end through the vacuum lines and let it sit for an hour, fired it up smoked like an sob for a while, poof ping is gone.. I'm thinking possible dirty intake valves.. Ford Dealer also told me that ping is an issue, not always solvable,, but this solution worked for me.. I think Ford makes some type of intake cleaner also..
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