NissanNismoZ

Ill check at advanced and see if they have the 3M cleaner. Thanks!

I can't find anything to really clean them and I've read that most in tank fuel system cleaners are just alcohol. Ill add that tonight after work I jumped in it and took off and it felt...normal? (The normal power feeling only lasted a few seconds, maybe 10-20s) Again until it got that bogging sound and then back to that less-than-powerful Pathy.. if something is clogging its like its taking a few seconds to get clogged again..? I can say that while I had that lower intake off my intake valves were really clean!!!

Ill try looking up on how to clean them and go from there.. thanks! I will say, that since I have owned this Pathfinder, I have always bought 0% ethanol gasoline. Sure I pay 20c more but I feel better knowing it isn't watered down

Actually, my fuel pump pressures were good, and still are, its just it acted like it didn't pump out enough under a load. All I did was clean the filter in the tank and put it back in.. I didn't swap the fuel pumps out.. After doing that I noticed how it actually ran because that filter wasn't stopped up like it was.. fuel pressure did as it was supposed to, as vacuum decreased (revving it higher) fuel pressure increased. IIRC pressures were around 45psi.

So lets say the injectors are clogged..what could I use to clean them without removing the fuel rail/upper intake Plenum? I really don't want to go that route again..

I reset the ecu after I test drove it last night and wentbto bed, leaving it unplugged all night.. Knock sensor is mounted in and working.. (Note my exhaust now vibrates, which may or may not trigger the KS) My fuel injectors are all clicking..which means they're working..right? I could not find any vacuum leaks using Carb cleaner on every vacuum/intake joints.. so I guess no leaks? I will say thatit idles around 700..maybe just a hair lower.. and my brakes seem like I have to hold it to the floor some times.. I will check for codes tonight after work as my CEL did come back on..

I got a little too excited..drove another Pathy that really needed a tune-up..and it had a lot more power than mine! I found out today mine has more power to the point of it being drivable..but I still have no WOT. It just bogs.. I can't pass people up hills, still with the harder I push the pedal the less power I get.. BUT. It isn't as bad. But its still there. Today, I thought I would put the timing back to where it was (right now it is FULLY) advanced..and..it just dies. It will NOT run anything under fully advanced.. any ideas?? Swapped their coil for mine and no difference.. I hate that I said it was fixed and it reared its ugly head on me today! So what I'm asking now is: What would make it run on nothing BUT fully advanced base timing?? Thanks.. I appreciate you guys bearing with me.on this..and to whoever figures this one out (I know it isn't much) but I will GLADLY PayPal you 10$

Woo!!!! GOOD NEWS!!! The Pathy is finally FIXED!!! Ok. So I pull my tank cluster and notice the intank filter is clogged right at the in-line.. and I mean full of little black.particles.. so I clean it, really well and assemble it all, check for leaks with key on and start it and TADA! It idled with a miss that went away after driving it some. But. It actually accelerated again!!!! It finally coasts at 2k rpm and can accelerate at that range again!! Pathy is finally fixed and ready to go roughly 2 months and 200$ later. Thank you EVERYONE for your input! I really appreciate it all. I couldn't be more happy.

Finally got a fuel pump. Guaranteed for a year or my.money back. I noticed the 89 I grabbed this from had two fuel gauges.. and this gas sender has two sending units on it. Is this.compatible with the 95? Can I just swap that sending unit in for mine? Thanks!

Finally..got it all assembled with tons of cuts and bruises..but eh. Hoping it would be all worth it..got everything hooked up and it wouldn't run! Kept turning it over and over..several times and advanced the timing all the way advanced and it finally ran good! The power up hills. did not change. New knock sensor has made a little change (quieter..no more loud pinging sound) But. It has absolutely no power at all! Sometimes it struggles to reach 20mph to accelerate.. the only thing it can be is fuel pump..right? It puts out enough pressure..but its still running extremely lean..I can't run a volume test as I have nothing to test that with.. Thanks everyone..its like the fuel pump just fails under load..

No progress yet. Trying to scramble around and source parts for the bypass hose and injector seals isn't easy.. looks like ill be pulling the seals from the jy early in the morning and start finishing it up and hoping the new knock sensor helps it..

Just recently yes

The connector is fine..mynguess is they taped it.to prevent it from getting broken.. so now after work I'm going to rethread the hole (crammed with rust) and hope forvthe best. So now I'm at square one. I know a knock sensor wont cause it to run the bad..or the lack of one. I don't know why my CEL doesn't stay on all the time then..

Here is a link to the pic.. http://i208.photobucket.com/albums/bb9/Nismo_Nissan_350Z/IMG_20120606_192520.jpg

Ended up taking both intakes off..as I couldnt feel it..so..I find..the knock sensor is gone! I can't even find a connector ..unless its the one taped up, looking like a professional taped it up or factory taped up.. anyway. That plugin is a two prong, with only one prong in there. All I can find is a few acorns..can anyone help?? I'm so lost..

Already one step ahead. I have both upper and lower intake gaskets ordered. And yeah, i found the thread you were talking about, and they said they could reach under the lower intake and replacing the knock sensor that way.. I doubt i'll be that lucky, but im going to try it. Thanks! Starting as soon as the parts come in tomorrow morning around 7:30. Hopefully ill have it done before nightfall and get to drive it home!

Did some testing..turned out to be the Knock sensor. Ugh. its going to be a job..but its gotta be done.. Any tips? Going to get the part Wednesday and start on it 8am that morning and hope to get it done before nightfall.. Thanks everyone. Hope this long thread helps someone with the same problems in the future..

So..figured out that the exhaust isn't clogged..and its actually extremely loud with no muffler. Ouch. So..I could t bring it home with it still acting like that. Going g to try checking fuel pressure while driving and seeing how it goes. Thanks everyone.

Fixitman: you do have a point! Yeah..luckily I was able to get my money back.. ill go ahead and try another fuel filter..as this one is a year old and its possible to be clogged now. Going to pick it up tomorrow and ill start progress on it again. mlu: so far..all gaskets are good. thanks for the idea though!! So far.. I'm at: Monday : Having O2 sensor replaced and muffler changed. Along with repairing melted wiring. If muffler does NOT improve performance, a new fuel filter is going to be installed. If that doesn't do it..then it HAS to be the fuel pump.. Thanks everyone. Lets hope it'll make the 40mile trip home for me to do the work to it..

The computer, when i connected it (OBD 1 doesnt have many features...) id give it gas, enough for it to try stalling out again, and it said the fuel pump was failing..then it went back to normal..i did it again and it said the Airflow CKT (MAF i guess) failed, then went to normal..i dont know how accurate that is..but it gives more information. My shop teacher still has the pathy..and i let him drive it..he said it drives just like his Mazda Tribute did when the exhaust was stopped up..so im going to trust that and get a new muffler...(he doesnt get paid 60$/hr for nothing..right?) If this doesnt help, im going to see about checking fuel pressure when he has a bay open again. But yes, its running VERY lean and acts like it is starving for fuel..so im not sure.. I removed the valve cover to check the lifters and i forgot to (it was 4am...) put a harness back to being tied up..and took it for a test drive and burned a wiring harness to the exhaust..UGH! It's apparently one that is on the METER fuse, because it took the gauges out (had a dim battery light left on, other than that the gauges were DEAD) Any idea what harness this is? It's one that runs beside the O2 sensor in the engine bay... Thanks.

Just ran a compression test..and..all cylinders are no more than 3psi of each other, averaging at 135psi.. so compression is good? It died on me at the stop lights on a busy street and wouldn't move.. wouldn't start back.. gave it a few and it ran with little to no power until I got to the shop..

Seriously?! I bought a new distributor. It runs the same. Only it wont run unless the timing is all the way advanced. I don't know what to do anymore..

So..today. the mechanic looked at it..and immediately looked at the distributor.. he toyed around with it and told me the timing advance has went out.. so I could see how everything can check out OK but that.. so now I have to shell out 200$ for a new one..great!

Yes sir! That's why I said that's not something I'd want to get into..