G50 1994 Q45 with TCS Plenum post

[burijon]

This is the start of my plenum posting.

Here is what I have so far.

The plenum "kit" from Joe only consists of the air hoses and no water hoses. Just ask Joe for the kit plus all the coolant hoses.I sourced my knock sensors in OE Nissan boxes from Ebay for $68 eachI also bought KS harness from JoeI got R9 8mm fuel hose for $6.89 a foot at my local NAPA. I know there are plenty of posts about ethanol needing at least an R10 or more rating but the stuff is next to impossible to find locally. It's gotta be better than my 13 year old hose now.OE Fuel Pump as listed on invoice below.OE Fuel filterUpper and lower radiator hosesThermostatNissan RTV, the red stuff I think is what Joe called it, Expensive. $18OE fuel injector bought last year to replace #6 $17010 NGK #PFR5G-11 for $35 off of Ebay, separate auctionsValve Cover gaskets $13 something and change, need to find invoiceThrottle body gasket from Infiniti Richmond $9Previously installed new PCV, Air Filter and Fuel filter.

Will keep updating when new parts arrive.



Modified by burijon at 9:04 AM 4/26/2007

Modified by burijon at 9:10 AM 4/26/2007
Modified by burijon at 9:11 AM 4/26/2007

[burijon]

It was raining this morning so I waited for a lull and did the fuel pump first.

Tangalora's posts were perfect as usual and I didn't bend the sending unit!

It took me less than 2 hours from start to finish having never done it before. Most of the time is spent taking things apart.

Pictures coming soon.

[silver2k2]

Are those the knock sensors with the B sticker if so I believe they are factory rejects, its a alot of work to replace. Just and FYI looks like you have some good maint going

[burijon]

Nope no B sticker that I saw. Thanks for asking though. Long day. I'm sore.

[burijon]

Another bad injector found!

At least I have a beater car to drive around this week. I'll be looking for the best used deal I guess.

All the original injectors ohmed 10.8 perfectly to one another. The new one from Joe ohmed 11.2.

I guess I will send both rails off to be cleaned and tested since I have to get another injector anyways.

I've got the plenum and throttle body, IACV and EGR spic and span!

More to come.

[burijon]

I am dying here. I've called Joe twice and each time I asked him "do I need any more hoses? Is there anything else I need?" I still don't have all the hoses! The parts I do have don't match up to the ones on Wes's parts list! I've got to get this thing together as it's already been a week in pieces. Every time I call my local dealer it's like pulling teeth to get help and the prices are through the roof.

I have the fuel rail in and the harnesses connected on the valve covers. I can't seem to find a good picture in the FSM that will help me. EF&EC232 is better than nothing.

Any body want to come to my house and help me!?

Thanks for listening.

[ponzy]

Wes' parts diagram is from 90-96. There are 90-93/94-96. Those 2 groups differ from bypass hoses and some air-bypass hoses for valve covers and heater hoses, you dont need some of the hoses on the list.. If you havent change the vac hoses, pls do so cause most of them are As hard as metal pipe. I didnt change my aac air hoses, u might as well change that too. The hoses i cut are 2 egr air hoses, 2 heater hoses from TB, and some vac hoses. I removed 2 lower runners(5&8) to get me clearance for right hand fuel rail and knock sensors.Right now i still have vib symptom code 51 injector circuit. I didnt change the injector harness cause its $218.xx. That could be my only problem. I thought i could get away without changing those. Make sure you check the continuity of the harness after reinstallation of the rail cause sometime n the process u have to twist and pull the wiring so be careful with that. im using my phne right now and i cant type much cause my thumb muscles are getting cramps for texting-like. Need to stretch and joint mobs my cmc joint. Good luck.

[burijon]

Sorry for your woes as well.

I have all the hoses that I bought on the car now! The only hose I don't have is the one with the piece of metal in it. I think it goes directly underneath of the throttle body from the pictures I'm looking at.

I need someone to take a picture of their Q with TCS and show me where to put the air cut valve body back on the motor. That would be a great help. I keep looking in the FSM and they talk about the air cut valve and how to diagnose it but no diagrams I can see of where it hooks up and how it's bolted to the motor.

I think I have realized that I have a California model!!! What a pain! Hopefully with that picture of the Air Cut Valve I should have it together tomorrow.

Thanks NICO!

[ponzy]

You have to re -insert the acc unto the hose and re insert the metal thing from plenum(just in front of the acc). If both is seated properly put the gasket(assuming u clean scrape the acc surface) before you screwed it back again (4 long screws).

that nightmare is still fresh on my mind and giving me goosebumps thinking i might gona redo that again for injector harness r/r (actually i think i dont have to remove it, im not yet sure)

[burijon]

I think we are talking about two separate things. I know the ACC on the back of the plenum. The Air Cut Valve is part of the Traction Control System. I haven't found a clear picture of how or where that thing bolts to the motor.

I've looked through most of the posts with pics for the plenum pull but haven't seemed to narrow it just yet.

Thanks for your help ponzy!

[burijon]

For your injector harness, you should only have to pry up the plenum and unhook the injector connectors. There are several plastic clips keeping the harness in place. You can pry those out with a flat head. You could probably just cut the thing out if you are going to replace it. Just take notice of what connector goes to what injector!

[3Q Jay]

you may inndeed have a car certified 50 states, but that doesn't represent any additional equipment that i'm aware of. my 94 is 50 states and has 1 aditional plasticy hose going into the to of the tb. whereas the '95 which is 49 states does not. But, i think that is a '94 to '95 change and not due to 50 vs. 49.

anyway,

I have all the hoses that I bought on the car now! The only hose I don't have is the one with the piece of metal in it. I think it goes directly underneath of the throttle body from the pictures I'm looking at.

I need someone to take a picture of their Q with TCS and show me where to put the air cut valve body back on the motor. That would be a great help. I keep looking in the FSM and they talk about the air cut valve and how to diagnose it but no diagrams I can see of where it hooks up and how it's bolted to the motor.

I think I have realized that I have a California model!!! What a pain! Hopefully with that picture of the Air Cut Valve I should have it together tomorrow.

Thanks NICO!

is the hose to which you refer the 'bottle brush' hose? that one goes on the very top near the TPS primary sensor, and actually ends in the elbow 45° before the TB.

i'm not sure what you mean by the aircut? the motor driven 'throttle plate' thats b/n the snorkel from maf and the tb?



can you see it in the above picture?i might have a few more plenum w tcs pics if you wanna email me. too lazy to postem right now....


Modified by 3Q Jay at 9:32 PM 5/5/2007

[burijon]

Great pic thanks! It's the second hose to the left of the one you marked. The one underneath of the TB. I'll have to get my camera memory card reader and upload a picture of it. Your pic does help me alot with how the throttle cable goes on and the hose coupled directly to the left of the TB.

More fun to follow.

[burijon]

OK. Here is where I am stuck. I either threw away these small air hoses or something cause I don't have anything left to connect. I guess I will have to go get some bulk air hose and cut to length?

Any insight is appreciated!Does the connection marked in red connect to the hose? What about the white circled hoses?What about these arrows?And these arrows?I'm so close to finishing!

[ponzy]

sorry for the wrong reply, anyway, good luck, im not really sure what air cut valve is......sorry.....

re: vac hoses, i just bought a bulk hose and cut them into sizes respectively. just dont forget the small one about 3-4 in of hose attaching the plenum and TB of about an inch or two of gap bet the two.(flat parallel to the bottom surface of the plenum)

[3Q Jay]

not the line you drew in red.

the metal port is the one that you referenced in my picture, yes? that one goes to the charcoal canister, via the larger of the pipes you circled in white. kind of a 'U' shaped hose.

the last frame dated 04May, the hose you have the yellow arrow to (with the sleeve on it) goes to the throttle body.not sure about the others right now, will see if i have a piture of the underbelly of the spider to send you.

[3Q Jay]

[burijon]

Thanks to all for your help and pictures. I think I realized I had it more difficult than necessary as there was a random hose I stuck on there while trying to match up part numbers with the item location on the schematics.

A note for those venturing to do this. Keep ALL the hoses you can! It will take you longer but will help keep your sanity. I think if I had left a few more hoses in place I wouldn't have been so confused when trying to install the new ones.

Buy some bulk air hose(the small diameter stuff) as you will invariably tear some of them. I noticed a few slits after everything was back together on the EGR and BPT valve. They are easy to replace and the hose is $.99 a foot at NAPA or your nearest mom and pop CarQuest. I only bought 2 feet and have about 5 inches left. I did not replace all the air hose as some of it looked and felt very pliable even after 13 years on the car.

Allow yourself A LOT of time! Make sure you have alternate transportation for SURE! It took me 3 weekends to get it done as I am really slow and have a life(sorta) outside the Q.

I would have had it start the first time if I had put the fuel pump fuse in the correct location in the fuse box :zerothread?id=249684

It's all back together and crazy wonderful smooth and fast!

A few questions for anyone.

1. I didn't touch the instant suicide TPS or any of the electrical gizmos on the throttle body whatsoever. The idle appears to be about 850-900 on the tach while at warmed up temp in Park. While in D with or without the AC on its right around 700. I know this is too high. Will it work itself out as I drive it and settle down or do I need to wait for the dirt to plug it up? I am scared to death of touching the TPS without a Consult. I suppose I could try it but I'm happy with it the way it is now. Is it just the IACV screw on the back of the plenum?

2. The 3 cables which I assume are for throttle body and transmission kickdown. How do I measure deflection? I tried to match it back up to the clean threads originally set by the factory. It feels as if the transmission kicks down to soon in the pedal. Is the black or the green connection on the passenger side plenum cable connection the transmission kickdown? Neither?

3. The car is fast for sure but doesn't FEEL as fast as I thought it would(after rehabilition). I know that's a pretty blanket statement having NEVER driven another 94 Q. Is that what all the whining is about no low end on the Q?

[3Q Jay]

A few questions for anyone.

1. I didn't touch the instant suicide TPS or any of the electrical gizmos on the throttle body whatsoever. The idle appears to be about 850-900 on the tach while at warmed up temp in Park. While in D with or without the AC on its right around 700. I know this is too high. Will it work itself out as I drive it and settle down or do I need to wait for the dirt to plug it up? I am scared to death of touching the TPS without a Consult. I suppose I could try it but I'm happy with it the way it is now. Is it just the IACV screw on the back of the plenum?

2. The 3 cables which I assume are for throttle body and transmission kickdown. How do I measure deflection? I tried to match it back up to the clean threads originally set by the factory. It feels as if the transmission kicks down to soon in the pedal. Is the black or the green connection on the passenger side plenum cable connection the transmission kickdown? Neither?

3. The car is fast for sure but doesn't FEEL as fast as I thought it would(after rehabilition). I know that's a pretty blanket statement having NEVER driven another 94 Q. Is that what all the whining is about no low end on the Q?

1. if you cleaned your plenum good while it was out (i'm sure you did--having gone in that far) it now if back to 'near' new and your aac is set too high from previous mechanics attempts to 'make it right' as things gunked up over the years. screw that bad boy clockwise until the aac is under ecu control. if you don't have the laptop consult, i'd recommend setting the idle to 500 in gear with the engine hot and the aac connector demated. that'll get you close.

2. kickdown is via tps and the open throttle switch, which are controlled by the slack or lack of in the tb cables. but there is no 'kickdown rod' or 'cable' per se. look at the first picture i posted. the end of the cable (yours will be connected to the tb) should have ~3/8inch vertical deflection at HOT idle (the fast idle cam will spoof the measurement).

3. heavy car, high gearing. but, when you go 60-90 locked in 2nd, how many cars can keep pace?