NorCal Mechanics
- Thread starter Husafan
- Start date
The Jeep is a 1987 Comanche with a 99 Cherokee engine and interior. The OBDII diagnostics are on the 99 Cherokee engine. I've read the codes on my own and found a P0132 and P0135 and plan on replacing the front bank O2 sensor fuse and the 02 sensor itself if the fuse doesn't do it. Anyhue, I was still hoping to find a mechanic I could go to if neither of these two things work.
shortbus4x4
Expedition Leader
Sounds like you are on the right path. Make sure your O2 sensor heater fuse is good. If you had a scan tool you could look at your data stream and see if your O2 sensor is switching and in the right voltage range. I would be willing to bet that your O2 sensor is bad.
Thanks for the tips! I replaced the O2 sensor and the fuses, which got the codes to disappear, but the light was still coming on. My generic OBDII was showing a bunch of monitor warnings, so I took it by a shop and had it read in detail for $45. Turns out the next issue is a missing vacuum canister. It's P0443:
So basically, my next move is to find and install a vacuum canister.
So basically, my next move is to find and install a vacuum canister.
shortbus4x4
Expedition Leader
I think you will find its a little more involved than finding an evap canister and installing. You will have to get all the emissions stuff working and installed properly and that includes stickers. Then you get to go see a Referee. The joys of living in Cali.
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shortbus4x4
Expedition Leader
Oh shortbus, this is not good news. Not good news at all.
Stickers are the underhood emissions stickers that tell a tech every emission device on the vehicle. It will say TWC for three way cat, PCV for postive crankcase ventilation, EVAP for evaporative controls, EGR for exhaust gas recirculation, etc, etc. Here is what it would be on the sticker, TWC EVAP PCV EGR, this is just a very simple example. A referee is a state guy who is going to inspect your vehicle to make sure it has all the 99 Cherokee Emission compenents hooked up and functioning. Lots of times they are at Community Colleges. I don't know any good smog shops down your way as I was in Napa CA or Humboldt County CA. You might try putting this question on the Regional Forum for CA. Do you know if your 99 4.0 is a Federal or CA only emissions rig? I can do a little research and tell you what smog components its supposed to have.
Cloaked Willys
New member
Give Jeff at Arabia's Overkill Off road a call. He is in Campbell and does great work.
Cloaked, thanks for the tip! I'll give him a call.
Shortbus, I have included a picture of the sticker below. I am still not sure whether or not it's Federal or CA emissions, but I think it's Federal. In case you can't read it, it says:
EFI EGS EGR TWC
My buddy and I went to the Pic-N-Pull today and pulled a bunch of emissions components from a '98 Cherokee. We got an evap canister, a purge solenoid and the tubing. We plan on installing it all tomorrow and I think this should give us a function emissions system. The only other component that I think could be installed, which we don't have, is a Leak Detection Pump. I don't know for sure, but I would imagine it would go where I marked a #1 on the picture below. Right now, there's just a stopper there. To be honest, I haven't really researched an LDP and don't know if it would need a special ECM. I don't know how it would wire in or anything. But for now, we plan on installing the parts below and seeing what the ODBCII says. How does that sound?
Shortbus, I have included a picture of the sticker below. I am still not sure whether or not it's Federal or CA emissions, but I think it's Federal. In case you can't read it, it says:
EFI EGS EGR TWC
My buddy and I went to the Pic-N-Pull today and pulled a bunch of emissions components from a '98 Cherokee. We got an evap canister, a purge solenoid and the tubing. We plan on installing it all tomorrow and I think this should give us a function emissions system. The only other component that I think could be installed, which we don't have, is a Leak Detection Pump. I don't know for sure, but I would imagine it would go where I marked a #1 on the picture below. Right now, there's just a stopper there. To be honest, I haven't really researched an LDP and don't know if it would need a special ECM. I don't know how it would wire in or anything. But for now, we plan on installing the parts below and seeing what the ODBCII says. How does that sound?
shortbus4x4
Expedition Leader
That sticker is for the 87 engine and emission components. It is a Federal emissions package, if it was CA it would say "meets CA EPA requirements". Here is what the stuff means: EFI is electronic fuel injection, EGR is exhaust gas recirculation, TWC is three way catatlytic convertor. I think EGS is exhaust gas sensor which would be your O2 sensor. You would need a sticker for the 99 engine and emission components which are going to be a wee bit more advanced than a 87.
Enough theory. Here is what I would do. Get the 99 stuff all working and the check engine light off. Make sure the OBDII monitors have all run and passed before you try a smog test. Make sure your 99 engine has the same emission components listed on the 87 sticker, it will actually have more. Then go see if you can get it smogged. Play dumb when you take it. You don't know "nuthin" beyond you just bought the vehicle and want it smogged. Make sure you tell the tech though where the diagnostics connector is, don't call it OBDII connector or anything else. Actually don't even tell them because I think on pre-OBDII stuff you don't even check for codes so they have no reason to hook a scan tool up. Do a pre-test first, make sure you tell them you want a pre-test too and its noted on your repair order that you sign. Any smart smog tech is going to notice that you have a newer engine and emissions in an older vehicle. If they have to plug a scan tool in even a dumb tech is going to know. If you get caught its probably useless to try another smog station as all the smog check machines talk to the state and each other.
Enough theory. Here is what I would do. Get the 99 stuff all working and the check engine light off. Make sure the OBDII monitors have all run and passed before you try a smog test. Make sure your 99 engine has the same emission components listed on the 87 sticker, it will actually have more. Then go see if you can get it smogged. Play dumb when you take it. You don't know "nuthin" beyond you just bought the vehicle and want it smogged. Make sure you tell the tech though where the diagnostics connector is, don't call it OBDII connector or anything else. Actually don't even tell them because I think on pre-OBDII stuff you don't even check for codes so they have no reason to hook a scan tool up. Do a pre-test first, make sure you tell them you want a pre-test too and its noted on your repair order that you sign. Any smart smog tech is going to notice that you have a newer engine and emissions in an older vehicle. If they have to plug a scan tool in even a dumb tech is going to know. If you get caught its probably useless to try another smog station as all the smog check machines talk to the state and each other.
shortbus4x4
Expedition Leader
If you want to do it the CA smog legal way, then yes, go see a referee and do it right. The nice thing is if you ever go to sell it you should get more for it in CA because it is a smog legal swap.