Still getting these after putting new exhaust manifolds, cats, all 4 o2 sensors, took the k&n fioter and replaced it with paper, recleaned the maf. It is running rich!!!! Anyone have next place to check? Throttle body is cleaned as well. And new plugs.

Possibly coil?

Interstate battery is about six months old. New thermostat about the same time. New belts same time. Crank angle sensr new two weeks. New heater hoses one week. Some weeping from the valve cover towards the lower side toward the cabin. Those were renewed about a year ago but I have new gaskets on hand, new iacv on hand, and new coolant temp sensor on hand.

Anyone have my next move?

Thanks guys!

 

Are you absolutely sure you've got your O2 sensors wired up correctly?

 

I don't know honestly as I didn't do them. Does it make a difference that I was getting the same codes before I changed them out?

 

By the way, I put a new cts in this morning and now I've been getting an iat code and the richness code....

 

In my experience (designing embedded systems), no it doesn't matter. It wouldn't be the first time I'd seen one problem fixed and another simultaneously introduced with the same symptoms.

Don't assume anything - just check they're all correct, check it off the list and move on. I can give you the colour codes for the wiring if it helps. Likewise battery, spark plugs, MAF, stats, temperature senders (both of them), injectors - check they are actually working correctly using a meter, then tick them off the list and move on.

Best of luck.

 

Could you give me the color codes? That would be great! Thanks!

 

If you refer to the color codes as a way of telling that the O2 sensors are wired to the right connectors, it won't work. The sensor circuits are associated to the correct bank via the "O2 sensor orientation" procedure run with the dealer level software. So, the "correct" sensor connections depend on the connection the last time the orientation was run. Why did they do that? I don't know, but they did.

 

Oh, wow. Glad I found that out!

Could you pull them one at a time and watch real-time readings from the ECU on an OBDII scanner?

 

Yes, that would be a good way to test!

 

Thanks for the input on this one guys. I'd like to just find a used WDS and just be done with it but, in the meantime, I'm pretty sure that my issues lie with the fuel pressure regulator. Have one on order and the symptoms are spot on.

Thanks again!