NissanNismoZ

The EGR makes a purring noise when running so I assume so..? All injectors are clicking..tomorrow I'm going to check fuel pressure.. anyone happen to know the PSI it's supposed to be at?? Thanks! MAF is good. No.problems with it anymore..

So..after it being parked last night I pulled the brake booster hose and it made a loud POP and hiss..indicating there's vacuum there. (It made me.jump) And removing that didn't change how it ran. Pinching the IACV blow.by hose didn't rev it up. It did nothing..so what I gathered from that is: It has plenty of vacuum. There is no leaks. Thanks guys. Maybe we're on to something?

If I don't touch the brakes with it parked for a few days the booster does still have vacuum unpess I pump the brakes several times or one good full on pump. Bit now it runs at such a low rpm it usually doesn't have much vacuum by rhw time it dies..if that makes sense? It never got hot..the temp gauge hasn't touched the half mark.. ill try the brake booster hose plug in a few. I backed out my PS tensioner too far and can't get it back in. (I was checking my timing this morning and broke the AC tensioner so I'm removing my AC belt until I get a new tensioner assembly.) I found out this morning: My timing is right on the dot with the belt. My spark plugs are white; indicating its running too lean. Going to try the blow-by clamp and brake booster plug as soon as I can run it again. Thank you everyone! I will say that the vacuum is great enough to suck up a whole half can of seafoam quicker than I could count to 3..

The IACV blow by hose..where is that and ill try that too!

That's true. You know..I might try that if I can get the supplies..I'm trying everything you.guys are throwing at me. I really appreciate it! It's just embarassimg with it dying all the time.. when itndoes that I have no brakes and roll through a stop light..

I don't have a vacuum gauge but it drives the same without a muffler, just louder.. That's what I thought..because over floored mine before and it straight up went. Now of I do that it doesn't even try to rev up. It just bogs. It now doesn't idle. I had to push it into my parking spot here at work because it won't idle. I have to hold the pedal down, then put it in gear and NOT let it idle. Its really embarrassing. I was told by a friend to check the coil..is that a possibility? If the coil is getting weak that would be an easy fix.. Thanks guys for sticking with me on this..I really appreciate it..

Cat is removed. But my friend thinks my muffler may be stopped up.. I don't know how to check really..but it feels like it puts out some..I just know up some hills it would only have to unlock the torque converter and it would climb fine..now it has to be at 4500rpm to just keep a steady speed up that same hill going the same speed..its really emvarassing with semis passing me.. how can I check to see if its clogged? It just has less power the harder I push it up a hill.. it definitely drives better with the new ECT though. Tungsten: actually I didn't know that.. I.have hears a clogged exhaust can lower engine vacuum which may explain why it idles at 400rpm. I was idling out of a drive thru when someone pulled out in front of me and I slammed on the brakes and it just kept rolling.. I seem to have no.brakes at that low of rpm..

I just don't know what to do. Swapped O2 with a friends working one and still the same problem. I bought a ECT sensor, and now the hesitation is fully gone. It also accelerates more smoothly bow. I decided to see what would happen if in neutral under no load. I found out: If I stomp the pedal it gets loud and accelerates extremely slowly Yet if I slowly rev it up it accelerates a lot faster and quieter??! I don't want to have to sell the Pathy but I'm close to giving up...

just ordered the Beck/Arnley O2 for 41.06 from RockAuto..Thanks guys. I appreciate it!

Nice find! That's definitely rare here. As for your dilemma.. If it were me, I would use a Jack under it, preventing it from moving? If it.would work...put the transfer case in 4wd and loosen the bolts while.the hubs are locked? Hope this helps.. Good luck and get them.before they're gone!

Thank you!! I was reaching.up and over the tranny and couldn't find the connector..Doh! anyway. Disconnected it..and..the hesitation iis now gone, but it drives roughly the same now...i want to say if not better but still leaning toward the same...so does that mean the o2 sensor is gone? Thank you!

I lied, it's still doing the hesitation thing...just noticed it this morning, but i think my whole problem is connected to that hesitation problem. I cannot get to the O2 sensor connector to disconnect it..is there any other way to text the O2? I also have a few questions.. The O2 sensor..aren't readings from it ignored until the engine is warmed up? I think the whole problem lies within the hesitation as its most noticable on cold starts..and it FEELS like Pathy is normal again, until it gets extremely LOUD and bogs. What im trying to say is..itll have power for a few seconds at a LOW speed (1mph-10mph then it feels like it bogs and is stuck in bog mode.) Meaning, the 'hesitation' feeling stays there throughout the rest of the trip, until im accelerating lightly at a LOW speed.. Is this clear? I'm sorry, I really dont know how to describe it..but it feels just like im pushing the pedal, then im letting off and accelerating lightly, when really its accelerating LOUD and struggling because im pushing it a lot harder than usual... Thank you. Is there anything else i can test? I really dont know where else to start.. and i dont want to have to pay hundreds of $$$ to have a shop troubleshoot and fix it... I appreciate the help!

the new exhaust seems to have triggered a CEL... will check on the code tomorrow. I'm starting to wonder if the power loss may be related to the TPS adjustment.. because Pathy seems to downshift to 3k rpm a lot quicker and I have to now let off the pedal almost completely for it to shift back up. does the TPS control fuel mixture at all?? still going to try unplugging tthe o2 and hope for the best. thanks everyone for the help!

ill try the o2 sensor disconnected tomorrow.. and vacuum lines..I just checked them and they're all snug with no holes..

alright. so I decided to have them just install a new exhaust from the y-pipe, back. No cat or resonator now. It sounds mean, and power is increased a lot. But, it still doesn't feel like it has any power upon accelerating up small hills. it can hold its speed up small slopes now, but bigger it just can't hold it..I don't understand what could be wrong now.. still no CEL, BTW. thanks!

yeah, its definitely getting worse .. I finally threw in the towel and did something I said I'd never do; take it to a repair shop. Having them fix the exhaust leak and check/remove the cat. Thanks! I didn't know it could be that serious!

Alright, so i thought i'd compile this into a new thread.. Since after my long 300mi. trip in Pathy, through long mountain slopes and being driven hard.. It no longer drives right; such as it has /ZERO/ power. Note: Before the trip Pathy had been doing the weird (acting like i was pushing and releasing on the throttle, when really i was holding my foot steady, slowly pushing it harder to accelerate) BUT. Only does it when it's cold. This video demonstrates to the best of my ability of the problem: http://s208.photobuc...20-22-39-40.mp4 And the lack of power.. It now has to downshift to 3500RPM just to maintain speeds of 55mph up small slopes, where as before would be 55mph torque converter locked, A/C on and cruising right up at 2200RPM. Here's a video demonstrating the lack of power of just accelerating. You can hear how deep it sounds because of how hard im actually pushing it to accelerate...: http://s208.photobuc...20-22-46-04.mp4 I haven't had a CEL come on either. Anyone have ANY ideas?? I've tried even changing the TPS, and it STILL does the problem mentioned in the first video... I have also went from getting a steady 20MPG to a now 15-16 MPG. Thanks...It's really embarassing to the point of taking back roads just to get home because i have to push it so hard to keep speed up hills... It does have a major exhaust leak now, since the trip, my guess is i blew an exhaust gasket, but is it really possible it could just be the exhaust leak causing all this?? I mean, yeah im having it fixed in the morning, but it feels like there's more to it than just that...

so I put my old TPS sensor.back on as it was doing the same thing as my new one..(acting like I was repeatedly pushing and letting off the gas pedal) so I got aggravated and listened closely...and noticed a loud hissing noise..I get determined and start feeling around and on the back of the intake..there's a hose rotted off. aha! power loss and no brakes on low rpm AND weird tps-like issues were all fixed! Pathy does like it used to! I so now there's still some.power loss due to the exhaust leak, but now its 90% better and not having.to downshift to 3500rpm up a hill. Much better! Thank you everyone. I just put the old sensor back there it was, according to screw holes..

yep mines an auto. about to go change the oil and get that TPS right! it drives pretty powerless with it not being adjusted right. and I'm getting 15mpg instead of the usual 21!!

that's not a bad idea!! I'm getting tired of them as well. BTW. one more question since I can't find it in the FSM.. could someone with a WD21 post their tps reading at idle?? Thanks!

WOO! You guys were right. Slarti, the limp home mode was from the MAF. the previous owners crimps came loose on one and recrimped it and Tada!!! Much better. Thank you guys!

and yes the exhaust smells STRONGLY of gas now..

Now it wont even run..i start it up and it sort of runs under the 500 mark, then dies unless i rev it hard.