I installed new coil packs, NGK Iridium plugs, Upper and Lower Intake manifold gaskets.
I did a full radiator flush and fill and an oil change with Castrol full synthetic.

I am getting multiple codes still with Power Restriction showing.
P0302
P0304
P0306
P0300
P0316
P0171

I have done multiple drive cycles. I bought new 02 Sensors (Pre-cat and post) for both banks. I have not installed them yet though. Is this the likely culprit? I also ran 2 cans of Sea Foam through the tank to help clean injectors, etc. I am still thinking fuel injectors but haven't decided.

Just looking for a little advice. Thanks.

 

Welcome to the forum Danny,

I've moved this second post from your Intro thread to S-Type forum. Members here with the same model will be able to help.

Graham

 

Not likely O2s, no. Almost for sure not, and not injectors as 3 do not go bad at once.

Forget seafoam. You're headed the wrong direction.

Which engine?

Guessing 3.0, even though it normally uses platinum plugs I believe. Iridiums are 4.2 NA/STR. But may well be OK in the 3.0 (anyone know for sure?). Which actual NGK plugs?

If 3.0 you may have an air leak. Check fuel trims via OBD live data. E.g. get an elm327.

Also consider Search on the codes and see what others found (PCV? EVAP? etc). But cheapest is to at least check those trims.

 

If it's an earlier car make sure the coil ground wires were bolted back in place if they were removed. They're located at the rear of the engine in the area where the coil wiring harness runs into the top of the valve cover. You'll see the grounds running out of the harness. Follow them to see that they're bolted down.

 

+1 on reading STFTs and LTFTs to see if cause is vacuum leak.

It is always helpful if you provide the engine size and type as there are specific areas to look at for each engine.

 

Yeah sorry guys.
3.0 V6.

(I edited my signature)

I will check for vacuum leaks and the coil grounds.
Thx

 

With the P01171 code it says System too lean on Bank one. I have read that typically points to vacuum leaks but wouldn't that affect both banks?
This has nothing to do with the O2 sensors?

I have a CenTechOBD2 model 62119 and cleared the codes before each drive cycle. Both drive cycles I have completed have resulted in the same codes. The MIL only comes on after normal operating temp is reached usually after the city cycle and I have transitioned to the highway driving part of the cycle. The voltage on the O2s pretty much drops to zero during closed loop. Range should be between .9 and .1 volts but they drop to .01 and even lower during live reads.

 

I assume you mean P0171.

Has the breather hose below the lower inlet manifold been replaced as this can be a major source for vacuum leaks as well as the other crankcase ventilation hoses.

Another area is the IMT o-rings. The newer ones are green.

 

Lucky day Danny:
https://www.jaguarforums.com/forum/s...ics-faq-52720/

 

Guessing is OK but actual measurements would help you.

 

Update:
I did some live reads after checking foe obvious vacuum leaks. I heard none while moving the air lines around. The actuator is seating well too.
I ran at 750 rpm for about 10 frames for a short baseline then went to 1800 to check short term and long term fuel trim percentages.

Short term fuel trim percentages on both banks remained at 0 through 31 frames.

The long term fuel trims showed on bank ONE between 18.7% and 19.5% throughout all 31 frames.
However on bank TWO the long term fuel trim percentage stayed at MINUS 10.2% throughout all 31 frames of live date and during all rpm changes.

Does this point to fuel filter???

 

Yeah I replaced both upper and lower IM gaskets when I replaced all the coil packs.

Nevermind. you meant the tuner gaskets

 

You'll normally not hear any but a huge leak that may even prevent starting.

Those sorts of trims may be a pair of faults, one being a leak, but too little data to say.

 

Here is the live data set showing frames 8-31

 

I'm considering the MAF. MAP and maybe an EGR valve stuck open?

 

Perhaps it may be useful to perform a smoke test instead of replacing parts.

 

I couldn't agree more. It gets pretty expensive throwing those darts!

 

Smoke test was today. Only smoke they said they saw came from the crankcase. They are guessing maf sensor. That's another 100 dollar guess.

 

Where on the 'crankcase' did they notice the smoke escaping from???

 

+1

(The whole intake etc should be sealed and vacuum-tight.)