I have not had a H all summer, both 02's in the same pipe, did have one forever before that. So far I don't see any gain or loss by not using a H pipe, it would take a dual wideband 02 gauge to see if there is any difference between the banks for fuel trim. If you had the Cali spec truck with four 02's in it you could use a scanner to read fuel trim for each bank.

 

Yes, we hooked a computer up to it and ran a data stream for another issue that it has (dead cylinder when in overdrive sometimes) and it came back and read nothing other that something weird going on with one of the o2 sensors.

 

If a person had true duals could he use a Cali. computer with the four o2s?

 

Ok well there is your problem sir, it is not only dropping a jug in od it will also drop it at a lower rpm, you have all the signs of it, runs fat and drops in rpm. Spark test all the jugs one at a time and wait for it to stumble, see if it drops spark, fuel or low on comp.

 

By jugs do you mean cylinders? lol and How do I do a spark test in the cylinders? You talking about test the plugs? Because they are like 3 months old. lol