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Well got my phone in to see what's all going on behind the engine after my air Injection delete that I did not finish yet . And it appears the PO Removed the metal tube from head to head ? It's the big bolt hole in the upper right correct ? So the head is sucking in air through the uncapped hole ?
Edit: i traced the tubes back that i cut , and they seem to not go in the head . Now that I think of it my memory i read somewhere my year or engine did not have tubes in head just in exhaust ?
here is a close up of the bolt hole which I believe is for air pump. Looks like it is dead ended ?
I got another good look at the tubes I cut back there and they went from exhaust- then to device which was mounted next to distributor cap i believe(air diverter valve ?)
It looks like it has a plug compared to my old E7 heads with “in head” air
Have you tried to stick a straw or pocket screwdriver in there to see if it is actually open or capped off? I assume you have either have headers or stock manifolds without air tubes?
I just took off from a stoplight and smells like burnt something.
Only mods are headers , full exhaust. air pump delete , and EGR is not hooked up . Still electrically connected. Vacuum disconnected . Vacuum lines that went to air diverter valve ? Are just taped up as well as EGR. I got plugs so need to cap those off better than tape. Heck I wonder if EGR is stuck open or something .
I also have 15w-40 delo in the engine right now. If that makes a difference .
I just got 7.5 MPG. Now granted a lot of short trips , but all highway when i still had leaky manifolds EGR and air injection intact i got 18.5 on a highway trip !
Could my little cat be causing a ton of backpressure? It looks pretty toasty . Is a magnaflow universal cat. It loked like in the reviews guys were puttting the same model cat on their hot rods so i figured it would hold up .
Here's a pic of tailpipe carbon and catalytic converter.
I also have 15w-40 delo in the engine right now. If that makes a difference .
I just got 7.5 MPG. Now granted a lot of short trips , but all highway when i still had leaky manifolds EGR and air injection intact i got 18.5 on a highway trip !
Could my little cat be causing a ton of backpressure? It looks pretty toasty . Is a magnaflow universal cat. It loked like in the reviews guys were puttting the same model cat on their hot rods so i figured it would hold up .
Why are you running such thick oil? I didn’t use anything more than 10W-30 in my 5.0L
If you were getting 18mpg, why would you do that stuff?
3.55 gears . Stock 235/85/16 Cooper discoverers . E4OD .
I had a gnarly exhaust leak before is why I did all this stuff . put headers and full exhaust . Havent welded bung for EGR yet in headers (if i decide to on the fence ) and just deleted air to clean up engine bay and get rid of air pump now have idler pulley.
I was running 5 weight before but saw a video where an old logger swears by 15-40 diesel in his old gas rigs and i just thought id try it. I know that's probably a little of the mpg drop.
I just replaced all injectors a couple thousand miles ago . One did have a cracked cap but i was committed and didnt want to wait to get replacment . Maybe that mistake is coming back to get me.
I suppose O2 could be bad ? Its in driver header o2 port. So only reading off one bank of exhaust .
I've got the 5/8 bolts and copper washers I would like to go that route. I saw a thread where the guy grinded and filed one down to get the carbon out!
Slightly heavier oil will not make the economy that poor. I have that in my 4.9 due to the flat tappet camshaft. It has a bit more ZDDP for cheap. I would run 10/30 with a solid additive pack that was not $10/qt. VR1 and GTX Classic are available but spendy.
Start with fuel pressure check, fresh injectors, and a fresh O2.
They were Reman injectors I believe. It was like 400 some bucks a couple years ago for all 8 . I replaced fuel pressure regulator, filter and fuel pump at the time. Fuel pressure was perfect . This was all done maybe 2000 miles ago
O2 sensor gotcha ! I dont have a o2 related CEL only for EGR if that makes a difference
engine has tons of power in my eyes . So i would think not fuel pressure ? No sluggishness like I had before I fixed all the fuel pressure issues. It was a dog before
No the EGR is still all there minus the tube to the exhaust, and the vacuum . Still electrically connected and everything. I was under the impression that it will stay closed with no vacuum hooked up ?
I'll change the o2 , I do believe it is only about a year and a half old and maybe 2000 miles on it. I have only one code, EGR related.
Good idea on fuel pressure test . I wonder if fuel pressure regulator diaphragm is done for and I'm sucking fuel into intake . But changed that 2-3 years ago and only a few thousand miles on that as well .
I had a leaking EGR valve on my 4.9. Caused the idle to be about 100rpm too high.
Your O2 is a three wire, just find your ground and power. The last is your signal. Monitor it for voltage. Should float around 0.3-0.7V pretty rapidly.
