Well.... Happy Thanksgiving guys! Looks like I have a big vacuum leak. Here we're my OWN values at startup. Now, would this have anything to do with the SAI hose problem I'm having in a post above?

 

 

The numbers drop to stay about around .1 except 2/2 and it's at .4. the 3 bounce around a little but stay pretty low

I seriously think the vacuum from the throttle body going to the black cylinder canister on the passenger side which I believe is part of the SAI. I also noticed i average 6500rpm when warm and in park. If I disconnect my idle control valve my RPMs go up to around 7500, which from what I have read is closer to what it should be.

Do I need to clean the trottle body and do an induction cleaning? I did the seafoam treatment before I changed the plugs but I didn't get as much smoke as what people have said they get. Mine smoked for a mile at Max and then cleaed up.

 

Now you tell us about a Seafoam treatment! That alone could cause almost all this weirdness. Could have displaced crud.

 

Lol. Sorry. The treatment was a few months ago so wasn't sure it would of caused this problem but when nothing else was working I started thinking further back to things that have been done. I'll do another seafoam treatment and see if anything changes.

I've only had this truck for 2 years and it took me 6 months to realize they had the CEL covered with black tape when I took the dash apart, so who knows what the PO did, or didn't do.

 

No worries. If it was that far back, may not be a factor. Have had multiple codes, rough idle, etc after a Seafoam treatment, so just wanted to put that out there. This situation is def a head scratcher. I'll stay tuned.

 

Sounds like the o2's are shot. - read below.

If it is the large black canister, that is the fuel purge valve. You can test it with a pair of jumper wires. It is basically an on/off switched valve and should flow/not flow depending on voltage. If it flows all the time, you have found your vacuum leak. You may want to read the description of operation in the Rave. You can also plug that port short term for a test, if the 02 come off the bottom, you found your vacuum leak. Or - leave it connected , disconnect vacuum line behind valve and disconnect electric. You should feel no vacuum.. Much more common to have bad o2 than bad purge valve.

I assume you have one extra zero in there. Sounds like it is still rich, which would make sense based on your o2 readings. You could also swap in a new one of those because if it is not operating your idle mixture will be off, however this will not affect the 80% run - so I don't think it is your problem.

I have never done this, don't believe it does a damn thing, but what do I know I have only owned 11 of these.

Last suggestion - get a can of wd-40/carb cleaner(flammable preferred)/starting fluid. Spray it liberally around the top of the engine while idling, if it smooths out or speeds up, you have a vacuum leak. My bet is still on the o2's being bad.

 

Sorry for the long delay I response, it's been cold here and just haven't felt like dealing with it, but here's where I am...

I took the secondary air pump out, and mine was actually all intact so no need to do any repairs. The filter was quite nasty so I did replace that.

I also took my charcoal canister apart and replaced that filter. Looks like it's been replaced recently but thoughts it's worth a few bucks if it works. Well...... nothing did. Hereafter where I am with codes
P0161
P0174
P0171
P0141
P1171
P1174
P1129

Also P0161 and P0154, which is probably because I have foulers in. I think I might need to get longer foulers to get them further out of the stream. Remember, I don't have cats so not sure if that makes any difference.

one thing I did notice was, when tube from the intake is plugged into that long cylinder tube, the truck runs really rough. Thinking that might be clogged, I did blow air through it and it seemed fine. But, when I disconnect it, it runs smoother but has an idle about 900-950 RPMs. Could that long secondary air cylinder be bad? Could there still be a vacuum leak somewhere? I am going to get some electrical cleaner and clean my O2 connectors. I do know that I have a small oil leak that possibly drips down to bank 1 sensor 1.

I'm completely at a loss and about to just sell this damn thing lol. I love the truck, the ride, the functionality and the 4x4, but the codes and 9MPG isn't going to hack it.

i have not had time to purchase another o2 and swap out to see if it makes a difference. If I disconnect the ICV the Rpms go up for a second then back down but makes no difference in how it runs. The vacuum lines that go to the purge valve I think it is, seems that one is blowing air in but non is coming out.