I still hate OBDII - evap, heated o2 and other frustrations

[Joseph Dell]

It has been a couple of months and I still can't cure this problem: Heated O2 _and_ Evap Monitor show in the OBDII as "not ready". So I've tried everything but the DRB III to try to fix this.

I even installed a mopar performance computer to "try" it. Guess what? Evap Monitor isn't checked for... that's good. But O2 Sensor and Catalyst would never clear!

So now I _still_ have an expired tag and some frustrations. Does anyone have any suggestions? I may try someone else's PCM from a similar year car... but I can't think of anything else to try.

Thanks in advance!

JD

 

[PBJ]

Joe,
I am assuming you have tried all of the normal repairs...drilling additional holes in the O2 sensors, moving the O2 **** into a single tube instead of the collector, longer tip O2 sensors ( I believe they are off of a 3.3 caravan). I have fought this problem before also, but usually one of these will fix the problem. Somebody else had used a Bosch O2 that had more open area and a faster heat up time...I just don't know the number...maybe somebody else does. If I think of anything else, I will let you know.
Later,
Joe

 

[Jerry Dobson]

Who's header are you using?

 

[Joseph Dell]

Headers are the balengers... Could that be part of the problem?

JD

 

[ViperRichRT10]

Joe,

Cat Sims? Relocate O2 sensors? Great job on the GA Christmas party by the way!

Rich

 

[Ulysses]

The Evap code is most likely a result of the heater monitor failure. Fix the O2 monitor problem, you may just fix the Evap monitor problem.

 

[2002_Viper_GTS_ACR]

It has been a couple of months and I still can't cure this problem: Heated O2 _and_ Evap Monitor show in the OBDII as "not ready". So I've tried everything but the DRB III to try to fix this.

I even installed a mopar performance computer to "try" it. Guess what? Evap Monitor isn't checked for... that's good. But O2 Sensor and Catalyst would never clear!

So now I _still_ have an expired tag and some frustrations. Does anyone have any suggestions? I may try someone else's PCM from a similar year car... but I can't think of anything else to try.

Thanks in advance!

JD

Hey Joseph,

You MUST have a BAD Mopar ECU. The reason is, I had the EXACT same problem with my 2002 when I went to B&B COMPLETE exhaust (headers, cats, cat back), I was CONSTANTLY getting O2 heater problems, AND CAT inefficiency codes. Then enter Mopar PCM, I put it on, and all the problems went away. No more O2 heater not heating (The mopar PCM does NOT have a warm up cycle like stock ones do), and no more CAT inefficency (because it DOESNT CHECK them). So if you got codes on those two, either you DONT really have a mopar PCM (and Viper Tech, can actually read the pcm with an odbII and discern if in fact it is a mopar ecu), or yours is some how bad, or a newer version then mine.

Jon

 

[Joseph Dell]

Hum...

the PCM I'm using is from West Coast Vipers... It may not actually be a mopar performance PCM though I thought it was.

The funny thing is that I get everything BUT Evap and HO2 on my stock PCM but I can't get catalyst, O2, and others to clear with the mopar.

I've got a 3rd PCM to try as well along with relocation of the O2 **** on the headers.

I'm not 100% clear as to whether HO2 could be related to evap... After reading the shop manual I can't tell. It isn't clear. <g>

Thanks for the tips. I'll be back with some info after I try a few things later today.

Thanks!

JD

 

[Larry Macedo]

Which codes are being set and when did they start, Joe?

 

[Joseph Dell]

No codes... just NOT READY... It has only been an issue since I replaced my battery and _then_ had to go get the emissions check done.

I have a feeling that relocating the O2 sensor will help. I'm going to do that later today and see how it goes.

JD

 

[2002_Viper_GTS_ACR]

Hum...

the PCM I'm using is from West Coast Vipers... It may not actually be a mopar performance PCM though I thought it was.

The funny thing is that I get everything BUT Evap and HO2 on my stock PCM but I can't get catalyst, O2, and others to clear with the mopar.

I've got a 3rd PCM to try as well along with relocation of the O2 **** on the headers.

I'm not 100% clear as to whether HO2 could be related to evap... After reading the shop manual I can't tell. It isn't clear. <g>

Thanks for the tips. I'll be back with some info after I try a few things later today.

Thanks!

JD

I'd bet its not a mopar then, or they used the mopar, and over wrote it. Mopar just doesnt have those codes to my knowledge and experience.

 

[2002_Viper_GTS_ACR]

No codes... just NOT READY... It has only been an issue since I replaced my battery and _then_ had to go get the emissions check done.

I have a feeling that relocating the O2 sensor will help. I'm going to do that later today and see how it goes.

JD

ahhhhhhhhhhhhhhhhh..........

then DEFINETLY ITS NOT A MOPAR ECU !

All of my local MODDED viper friends who need to pass emissions odbII, use my Mopar ECU (temporarliy) to get passed, including myself. Mopar can be plugged in seconds before the test, and it lies that EVERY TEST PASSES. Just use someone elses REAL MOPAR PCM and you WILL pass, even if your hitting on 6 cyclinders ;-), and you will hear people tell you the vin is written in the pcm, they are correct, funny thing is, its not my vin, I bought this pcm from another guy, and odb has never ***** about vin not matching for me or my other fiends who use it temporarily.

Jon

 

[ViperRichRT10]

No codes... just NOT READY... It has only been an issue since I replaced my battery and _then_ had to go get the emissions check done.

I have a feeling that relocating the O2 sensor will help. I'm going to do that later today and see how it goes.

JD

ahhhhhhhhhhhhhhhhh..........

then DEFINETLY ITS NOT A MOPAR ECU !

All of my local MODDED viper friends who need to pass emissions odbII, use my Mopar ECU (temporarliy) to get passed, including myself. Mopar can be plugged in seconds before the test, and it lies that EVERY TEST PASSES. Just use someone elses REAL MOPAR PCM and you WILL pass, even if your hitting on 6 cyclinders ;-), and you will hear people tell you the vin is written in the pcm, they are correct, funny thing is, its not my vin, I bought this pcm from another guy, and odb has never ***** about vin not matching for me or my other fiends who use it temporarily.

Jon

Jon, Does the model year on the ECU matter when you guys "borrow" it? i.e. Roe Performance '96 ECU in a '01 model? Will it do the trick?

Rich

 

[Ulysses]

No codes... just NOT READY... It has only been an issue since I replaced my battery and _then_ had to go get the emissions check done.

Joseph,

I just read this part of the thread. When you disconnect the battery long enough, it resets a whole bunch of parameters that takes quite a few drive cycles before they reach acceptable pre-determined values. These will not show up on a regular OBDII scanner, but will with a DRB or the code reader they use at the smog stations. They will not pass you until these become acceptable.

I'm not sure if you have been having code problems in the past, but it sounds like you JUST recently disconnected your battery. If so, just driving around, stopping and starting your vehicle may solve the problem. Cycling the heater and the AC while you drive may help accelerate the process.

I had this same issue with my truck recently. I disconneted the battery to clean it the day before a smog check appointment and it failed due to a bunch of not ready parameters that were a result of them being reset when I disconnected the battery.

Of course, if you have had pre-existing code problems previous to this, you'll have to attack those too.

 

[Bandit3]

During the Georgia obd emission test--- the vin is downloaded to the state. If there is a discrepancy between the vehicles manually entered vin and the vin sent by the ecu--the state will contact the emission station, fine them and send the vehicle owner a letter to retest. I know--I own an emission station. John

 

[Mike Adams]

A mopar computer is p5007313 the label will show 313 in big bold lettering

 

[2002_Viper_GTS_ACR]

During the Georgia obd emission test--- the vin is downloaded to the state. If there is a discrepancy between the vehicles manually entered vin and the vin sent by the ecu--the state will contact the emission station, fine them and send the vehicle owner a letter to retest. I know--I own an emission station. John

John, this is the SAME story, I was told for me as the NC DOT does the SAME thing. But apparently there must be ONE other computer in the viper that holds the vin, because with my MOPAR ECU IN, it registered MY original VIN, not the one in the mopar, when the odb ii connected to my car.


Rich, I am not sure I know what your asking, but so far, the Mopar ECU has helped a 98, 99 and 02 all pass emission tests, all using the SAME one. lol Which I think my Mopar one has a date manufacture date of 1999. BTW the Roe ones are not Mopars, so I cant speak to wether or not they go immedietly to "pass" in all fields like the mopar one does.

Mike, Thanks for the clarification of the PCM/ECU Part Number (P/N) label, I guess your doing that so this guy can read his, and see if its REALLY a mopar ecu. OR he can just compare it to the one I JUST sent him today fedex to borrow .. :-D

Jon

 

[vipergts2000]

I have a MOPAR box that has p5007313 but on the actual PCM the big bold numbers are 406AA....What PCM is this?

 

[Joseph Dell]

All I can say is that the "Mopar Performance" ECU is an amazing piece of equipment. Car runs great with this new addition to my snake. It also took care of all issues related to OBDII. In fact, many of the things that are tested for by OBDII are not tested for with the mopar performance ECU. I still don't know what my real problem was, but I suspect it was the PCM...

JD

 

[2002_Viper_GTS_ACR]

All I can say is that the "Mopar Performance" ECU is an amazing piece of equipment. Car runs great with this new addition to my snake. It also took care of all issues related to OBDII. In fact, many of the things that are tested for by OBDII are not tested for with the mopar performance ECU. I still don't know what my real problem was, but I suspect it was the PCM...

JD

lol, dont get TOOO aquainted with it.. its on its way back to Daddy (ME) !! Good luck aquiring your own. Its definetly yours to use, if you ever need it again, for next year, or the year after that.. etc.. Glad it got the job done.

Jon

 

[Jerry Dobson]

JD,

I am somewhat confused on what year PCM you were having the problem with? In 2000 they changed the "warm up" time for the 02 sensors to become active for emissions. If you had a 2000 or newer PCM running Belanger Headers that is your problem. The location of the 02 is on the collector and would need to be moved closer to the head. Your car is a 1999 so I did not originally think that would be your problem. The Performance PCM does not require the quick warm up.

 

[Ulysses]

Jerry,

I thought 98 was when that was switched on.

 

[Joseph Dell]

For clarification, I have the original computer in my 99 RT. Also, the belanger **** location (headers are about 2 years old) is extremely close to the head... as in less than 12". I can't possibly move it closer without putting it IN the head.

A Mopar Performance ECU did not have the issue that my original computer had. strange...

JD