Well after a long weekend I finally managed to install the VI, remove EGR and use the A33 TB & IACV. Started it up yesterday and no codes, idles fine, but if I give it steady partial throttle, it will rev to about 2k them bog, dip to 1500 then back up to 2k & continues, all the while keeping throttle steady. I can floor it, it will tach up to a high RPM, then bog like it's not getting good fuel flow.
I double checked all my vacuum lines & confirmed via 98 FSM diagram. Plugged the vacuum line for the EGRC since it's not needed for the selenoid anymore. I figure since it idles fine then the vacuum lines or the AICV shouldn't be an issue. I still have the fuel damper connected and the vacuum line for that is "T"d off the FPR line running up to the TB. Could I have a bad damper or FPR? Maybe a problem with the MAP/Baro switch?
The car is an hour away so I won't get to work on it again till next weekend, but I'd like to get it lined out before I head back up there.

Thanks

 

Take off the T and run the FPR to a direct tap for vaccum and see if it fixes hte problem.

 

Already tried that Kevlo

 

Where did you put the 2 grounds on the lower IM?

 

For the fuel injectors? I ran a bolt & nut thru the eyelets connected to my ground wire kit grounded to the block.

 

If you are going to do it next weekend or head down like friday because I get off early 1:00 PM I could come to your car and we could check my car with you car to see if anything is out of place. I should have another phone by tonight. so just post what you want to do.

 

I had this EXACT same problem. I had exactly everyone of your symptoms. It has nothing to do with your fuel... But it was on my 3.5 with my ghetto rigged TB..

I launched it at the track, and and the throttle position sensor slipped off.

Check your TPS, and see if it is turning with the butterfly plate.

 

Thats what I was thinking, if his TPS was messed up some how but was not for sure.

 

Well I loosened and turned that whole TP sensor/switch control and the idle went up so I imagine that would be OK? The sensor is the top plug and the switch is the bottom correct, no way to mix the plugs. They are the same on both the 4th & 5th gen, well they had the same part number. I used the TPS from my 4th gen since the plug sockets were broken off the one for the 5th gen.

 

Hmm, try unplugging the TPS, and if see if you still have the same symptoms?

 

Too bad I'm a hour away from my car to try it. May call my brother tonite and have him give it a shot.
Thanks

 

Another way to see if the TPS is moving, is with the car off, test the voltage at the WOT terminals when you move the TB to WOT.

 

Per the FSM, the TPS should read ~.35-.65V when the TB is closed, and ~4.0V at WOT, and should gradually increase as you open the butterfly plate.

 

Is that w/ the engine warm or cold? The 2000 FSM shows .15-.85v closed and 3.5-4.7 WOT warmed up.

 

It says those numbers when the key is at the "on" position, with the engine off?

 

Ah, your looking at the 4th gen FSM and I'm looking at the 5th gen. Wonder if the TPS units aren't the same?

 

I dout they are. Hell the 96 TPS is different from the 97-99.

 

I'm lost are you all talking about the actual unit or the plugs?

 

According to the online Nissan parts order sites, the 95 have a differ tps from the 96 and hte 97-99 are differ from those two.

 

hmmm, the TPS that came with the 00 TB had the plug connectors broken off so I replaced it w/ the one from my 98 TB. They had the same numbers on 'em. I guess it was really a TPS from a 4th gen or the #s match both gens?

Edit:
97-99 TPS = 22620-4M510
00-01 TPS = 22620-4M511

 

Your 4th gen plugs should work on the 5th gen throttle body because mine did. I just pluged mines right in with no problem. You might have to set you TPS.

 

Hmmmm, my car does this when its cold, I can push up the throttle and hold it and the revs will bog around, after I drive around a little it tends to go away, I still have some sort of vacuum leak somewhere because I can hear it... Hmmmm, Im gonna go outside later and see if it does it...

 

I wish I could drive mine around, it's so bad I can't even get it out of the garage. Will not stay over 2000 RPM, it's like the fuel cuts out.
So if not the TPS, which I'm not sure it is anymore, then bad FPR?

 

If you cant rev passed 2K it sounds like when I unplugged my MAF then turned on the car.. heh

But I doubt its that, do you get any CEL's?

 

No CELs
I can rev past 2k but it just kicks back down to 1500.

 

If I'm not mistaken that does sound alot like the MAF. Try unplugging it and see if it stays the same.

 

It does but then I throw a CEL.
Had absolutely no problems before the swap. Figure it's something along that line.

 

It has to be your TPS somehow... My symptoms were 200% identical to yours.

 

The TPS is slotted to allow some adjustment and from what I remember it is sorta "spring loaded" inside. Could it be that it needs to be put on then twisted till it lines up w/ the screw holes? Am I way off... I can't remember what it looks like when it's removed?

I appreciate everyone's input/thoughts so far.

 

Its something like that I believe, your best bet is to take it off and see if anything is messed up. You might want to compare it to the one on your 4th gen throttle, that way u will get some idea of what its supposed to be like.

 

You could just put the proper VI on there and run trouble free. I don't even like the pos plastic manifold, and it came stock on my car!

 

Yeah smart and then he would have to spend another $400 for a ECU upgrade to even see good gains with the MEVI.

 

Plastic>Aluminum. Why? Plastic stays cool so engine recieves cooler air.

 

There are guys that run the 00VI trouble free...

 

You were 200% correct, I had the TPS mounted wrong and I guess it had tension on the spring so when I rev'd above 2k it thought I was much higher and was cutting fuel or something.
But she's up & running strong, now I gotta figure out the VIAS and I'm good to go.

Thanks gang
This site has been the cure (and cause) of many a headache.

pwned by the TPS!

 

Awesome man, so me and you had the same problem, damn that TPS...

How does it feel?

 

.....................

 

Plastic is also smoother allowing for better flow.

 

Feels good, but that could be from driving 2 different slow a$$ cars for the last week. I can tell I'm getting better gas mileage already. Drove for about an hour coming home on I75, the 80-120 kicks seemed a little slower but the VIAS isn't connected yet so I dunno. Hell, the better MPG alone was worth it.

 

Glad to see your car is up and running and welcome to 00VI club. I hope my help with the VIAS wires let you get that operating correctly. We definitly need to meet up for that Z meet.