Truck has 60k miles on it. new spark plugs ,wires and air filter
SOURCE: 1987 s10 pickup Service engine
Slow down, don't start tearing down the engine just yet. Error 74 is: P0074 Ambient Air Temperature Sensor Circuit Intermittent.
http://www.engine-light-help.com/generic-check-engine-light-codes.html
Testimonial: "Thank you very much I now can proceed with confidence."
SOURCE: 2002 Tahoe Dropping Cylinder
A tune up will not cure the lean code, in fact an engine miss gives a rich code from the unburned fuel. I would suggest u verify u have no vacuum leaks, also clean the inside of the MAF sensor if so equipped and replaced the bank two O2 sensor, that is the passenger side sensor before the catalytic converter. If u have the money replace both right and left sensors, it is better to do them in pairs.
SOURCE: 1996 s10 2.2 engine starts but idles rough and will not rev up.
Hi! You must be frustrated by now! your code is marking that the O2 sensor is bad in bank 1. Did you replace the O2 sensor that is located before the catalytic converter? The S10 has an O2 sensor specially made for that cat. its about 30$ That would explain for your blackened spark plugs; your pc on the car is asking for more fuel. GOOD LUCK!!
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