Shane4x4

I hadn't looked into the FSM for an exhaust diagram simply because what i removed for cats im sure was added to the vehicle prior to my ownership. I have just looked up an exhaust diagram to verify that what i suspected to be a cat right off the exhaust manifold is indeed a cat. With pre and post o2s for those. The two cats i removed were both different lengths and brands, also they were installed after the post o2s with no other o2s after them. I am sure their removal is not affecting anything. leaving the "cat discussion" aside ill just keep digging through the FSM for my answers. Thanks for the insight and the lead to the FSM. Shane

UPDATE*** I have looked into the TPS diagnostic procedures in the FSM as well as fast idle switch, cam position sensor. Since my last post i've replaced my IAC "first, with no symptom changes." along with my distributor "second, with some symptoms getting better.". IAC was on a whim chasing the surging/ high idle since TPS read accordingly, and the distributor was because i came across online that the shaft bearings like to blow apart commonly on pathfinders. Took inspection cover off and sure enough metal shards and missing 4-5 ball bearings. After replacing the distributor the idle is almost normal in and out of gear, in P or N it idle's at about 600-700rpms and idle rough like a skip. but the shifting has improved along with the surging idle while driving. The surging idle still is present, but not as often. And on first start up when its cold it still stalls unless you give it some throttle for a few seconds then let off. Maybe due to the fast idle cam gear assem. not being functional at the time? Still however have the codes: -P0120 TPS circuit A -P1490 VC/V bypass/V - P0161 O2SH circuit B2S2 - P0141 O2SH circuit B1S2 From what i've researched the P1490 will not affect driving or running conditions. It is simply part of a self check for emissions. And Precise1 as far as the O2S I don't think they're unhappy due to lack of cats, i still have the two "assuming they are actually cats" immediately off the exhaust manifold. Where there are pre O2S and post O2S. The cat's i removed were downstream of any O2S. So do you think the reduction in restriction of exhaust gas flow is tripping them? Really looking for some more insight as i continue this mess. I've exhausted the FSM's and my multimeter just about. Thanks, Shane.

Okay, things i will check next. I monitored my live data driving with my scan tool, the coolant temp hangs at 170, nothing more. So im replacing the thermostat. I also got the proper nissan TPS/Idle switch adjustment after a new one is installed. It is in much further detail than anything i've found online so far. I'm going to check and verify ground to the TPS from the sensor and the PCM as well. Hopefully after all of this i will resolve or determine the problem. Thanks for the advice Rebelord!

My extensive research has left me finding FSM for 01-04, or just 95 itself. neither of which help because the 01+ has drive by wire and all the procedures ask me to listen for the TP motor "which i do not have". Or it's for 95's which to my understanding has OBD1 since OBD2 didn't become in use in the US until 96. However i did get one PCM flash relearn to work which i found odd. Now i have non of the previous codes. What I have done since the last post mechanically is removed both post cats, one had fallen apart inside and rattled like crazy, the other appeared fine. however removed regardless to maintain equal exhaust bank pressure/CFM. Also the thermal element/fast idle cam was dripping, as i dug into that the outer retaining plate for the cam spring fell into the subframe, therefore it is inoperable until i order a new one. Likely the cause of the low cold start idle. NOW what is happening: -Idles at 500rpm on cold start for 5-10min, then increases to 1000rpm. -As soon as you select any gear after the cold start and the vehicle has warmed up, it will maintain an idle speed of 1300-1400rpm at 0mph. Doesn't matter what gear you select. -Still has the surging idle behavior in OD at highway speeds under 10-15% throttle position, what surge has started the slightest increase in throttle position will stop it. Current/ new codes: P0120 throttle/ pedal position sensor circuit A P0161 O2SH circuit B2S2 P0141 O2SH circuit B1S2 *I imagine the O2S codes are do to the high constant idle. I am going to visit the garage I used to work at and use their Identifix and Mitchell programs to dig a little deeper, but if anyone on here can help narrow down a direction to pursue that would be a great deal of help. Thanks in advance!

the tranny fluid was in need of replacing, it was brownish in color. The previous owner i don't think understood PM. prior to the drain and filter it .drove alright, shifted good but definitely shifted somewhat slow. So it wouldn't surprise me if the fluid change is the end all of the transmission as most would say happens. I'll be able to check a few more things along the lines of sensors and voltage/ohms values when i replace my multi-meter in the next few days. Precise1 I will search in that section for a more specific year range and hope for better luck there. Thanks for the advice gentlemen.

Hey all, new to this forum but have been on other forums for different vehicles in the past. I've got a 99.5 pathy, 3.3l 4x4 A/T 137k for miles. It's my DD, and currently having problems keeping me from driving it. making getting to work a daily challenge. one night the transmission starting slipping bad in OD, and then in 3rd. the following day i drained the trans fluid and did a filter. Among prior research i came across the TPS problems. tested, only read 2.4v at WOT "replaced" I also cleaned the TB. SINCE then it still shifts odd, kind of slipping into the next gear, catching OD early and staying in it. and the idle speed surges under a light throttle position. I've done a ton of research on all the relearn procedures however all of them i come across do not specify my 99.5 3.3l. and or are for the drive-by-wire TVPS set up "newer" All i really need is the correct relearn procedures for my pathfinder. Since i've cleaned the TB and the TPS. Any and all help is greatly appreciated, Thanks ahead of time all!