Hey guys,
I currently have my motor pulled out of my 95 GXE (VQ30DE) because of a blown head gasket. I decided to replace it with another VQ30DE. Last night when looking at both of the engines I was noticing some differences. The first thing I noticed is that that emisions stuff that is on the top of the plenum is not on the old motor but it is on the new motor. Also the old motor has one plug on the TPS, and the new one has two plugs. I realize I am running into these problems because I am putting a newer VQ in the car but how did you guys get around them. It was getting late lastnight when I was looking at everything but I was thinking of swaping the intake plenum and TB. Using the old set up on the new motor. Has anyone else ever gone thru this? If so what did you do? Thanks for any help.

-Carson

 

No need to swap anything but the TPS. Just don't hook up the EVAP or EGR stuff. The 95 ECU will not throw a code. Although, thats really weird that it only has one plug. My 95 has two.

 

what was your manufactures date? I am not at my car right now but it is either 6/94 or 7/94 so I am guessing this was a pretty early run on the VQ30. Don't know if they just used some parts from the VE....don't know. And as far a just swaping out the TPS's that is not an option, I would need to do the whole throttle body since the hole for the two plug one is bigger.

I do not work this evening so I will be working on the car, I will post back with other differences I find to see if you guys can help me out with them.

 

hmm....my '95 GXE had one plug...what do you mean the hole is bigger?

 

the cutout is bigger. The cutout on the TB where the TPS goes. The actual TPS unit is bigger on the two plug model. Like I said I am going to work on it tonight. I will report back with more info in a little bit.

 

ok maybe the TPS stuff is the same size What I ended up doing lastnight was just swaping intake manifolds and TB's. It just seemed like and easier way to go. I will post back if I have any issues with this.

 

I do believe that the cars w/manual tranny's got the one plug TPS, the extra plug is the "wide open throttle/closed throttle" switch used only for the automatic tranny.

I could be wrong, it's been a while since I looked into it.

allen

 

nope, my 98 if factory five speed with original motor with a two plug TPS

 

Do both of the TPS plugs have female plugs plugged in or is one left open?

allen

 

both plugs on the actual TPS are the female side of the connection

 

I have two plugs as well and I have a prod date of 6/94. Wierd. And my ECU is from 4/94.

 

hmmmmm whatever, so do/did you have that carcole canister on your fire wall as well?

One thing I ran into last night was that I was swaping in a motor that was in an automatic my car is five speed. Well I took the automatic flywheel off while the flywheel was off the old motor as well and noticed that on the end of the crank there is a spacer that is not on the five speed motor. We had to cut out the freaking spacer that was inside of the crank. After we cut that out with the dremel we were able to put the pilot bearing in (there was not one in there...I guess that is standard for automatic). I am going to swap the water pumps tonight since the one in the blown up motor only has about 1k, and the new motor I have no clue. Does any one have advice on doing the water pump? It does not look too hard since I have both motors out of the car. I got that one guys write up, it seems pretty tedious but also straight foward.

 

I have only seen the one plug TPS on 95s. My 95 only has one. Maybe it is a fed spec thing vs. cali spec.

 

Yep, I had charcoal canister. Fed spec setup with two plug TPS. I know for a fact it was never replaced. Only thing that went out on my car before I got it was the starter and MAF.

Water pump removal is a ten minute process when the motor is out of the car. Remove the plates. Remove the tensioner. Remove the three 10mm bolts. Use two 12mm bolts to "jack" the pump out of its place.

 

it took me more than 10 minutes to do it last night, but it was the first time I had done it, plus I was doing the whole thing twice. Taking it out of one engine>>taking the existing one out of new engine>>and finally putting the newer one in. I was having issues getting the chain off the water pump, that took me a while then it finally just got a little more slack and I was able to get it. I was loosening the crank all the way and it was not giving me enough slack so I tried rocking it back and fourth from tight to loose and finally the slack came out.

Also Broaner, I am assuming you left the charcole cansiter in the car? I really don't think my 98 has this but I have not looked either.

 

98's don't have it. I completely removed mine with no problems except a slight odor of fuel at times.

 

got ya, I will know more after tonight since I hope to have the engine back in the engine bay tonight after work. I just don't want to have hoses in the engine bay that do not go to anything, but should.

 

me and my brothers together drive 3 4th gen maxima's. mine's a 95 5 speed with one plug TPS, my two brothers with 95 and 96 maxima's are automatic with 2 plug TPS.

my girlfriend has a auto 97 maxima also with 2 plug TPS, and her youngest sister drives a auto 95 maxima also with 2 plugs on the TPs.

5 4th gen maxima's, 4 auto's with 2 plug TPS and 1 5-speed with 1 plug TPS. i think this concludes it all pretty clearly...

 

I'm like that too. There was nothing in my maxima's bay. There is some clutter in the 240 now but I'm working on that. I don't have the IACV anymore either. LOL.

 

motor is in and running....no exhaust

question: Where does the Boost sensor go? I am guessing that is a MAP sensor? Its on the new motor but I do not think it was on the old. Is there any where for this to go? If not what should I do with it? Zip tie it out of the way? Cut it off?

 

I have a '96 manual with a two-plug TPS...

 

then is there anyone with a 95 manual maxima with a 1 plug TPS???
this is prolly due to the production dates, then. i know for sure that my 95 manual is the earlier production max's. fidanza flywheel won't work with my car, thus i had to go with a stillen flywheel. now, if we can confirm that TPS differences are also due to the production dates, then there's another find...

 

what does the TPS have to do with you have a fidanza or not? I am a 95 five speed GXE with a 1 plug TPS, and I have a fidanza flywheel in the car.

 

My 95 GLE 5Spd had a two plug TPS. In case you didn't catch it, GLE's don't come in 5Spd. But after the swap everything still worked fine so... I don't really think its important in the 5Spd cars have one or two plugs. The ECU probably just sends the signal from the second plug straight to the TCM.