New Owner 1993 Z32 TT Technical questions....please advise..

[nissanfreak12]

I am really thinking the fork is the issue, its very possible the pivot ball is either toast or the fork isn't hanging on to it like it is supposed to. Might be a good time to upgrade to a heavier duty one. Take a look at this. Just a thought.

http://www.zspeedperformance.com/Nissan ... SP1005.htm

You will love the car a whole lot more once you get the clutch issues fixed.

[RobbieDobbie29]

Will do. I'm yanking th trans out today.

[RobbieDobbie29]

Figured it out. The clip on the fork that attched the fork to the bearing was tweaked. It caused the bearing to "pop" off the fork.....thus wedging the fork arm into the opening on the trans bellhousing causing the release to jam up. Bent the clip back accordingly and viola! It works like a charm! Also took the liberty of installing a manual boost gauge as well. The car holds vacuum at -15-20 psi at idle is that normal? Also at idle I notice a few small "pops" in the exhaust on the right side exhaust bank and every time it does "pop" the vacuum goes from -20 to -12 or so. It boosts at about 7 psi according to the gauge. Hows that?

[nissanfreak12]

Im glad you figured it out!!

The pop could be injectors going south, running rich, timing off. Have you checked for codes in the ecu? When it does the pop nad the vac drops, what does the rpm's do? If they rise that is completely normal, when you tap the throttle the vac will always drop. Running 7psi is bascally safety boost, but it sounds like the previous owner changed a lot so you may not have that option. 9.5psi is factory set, 6psi is safety boost, factory ecu without any tune and running on the factory boost solenoid does that to protect the engine due to knock or problems with the engine. Do not run higher than factory boost until you get the ecu tuned. Could mean bad news for the engine.

-20hg is normal at sea level, higher altitudes will see about -15 to -18, I see about -17. You did say he had a manual boost controller on the car didn't you?

[RobbieDobbie29]

Well the idle drops from 8-850 to like 600 or so. On the little pops, it almost sounds like a injector issue to me. But thats when I noticed the vacuum change so i was concerned about it. I'm wondering why the car is on safety boost, and it has a MBC on it. I opened the MBC to look for a boost change, but nothing happened according to the gauge. So, I closed it back up and it's the same boost pressure. I don't mind it boosting low for now as long as it ain't a critical issue. I don't want to blow up the car or melt it down...

[nissanfreak12]

Well the idle drops from 8-850 to like 600 or so. On the little pops, it almost sounds like a injector issue to me. But thats when I noticed the vacuum change so i was concerned about it. I'm wondering why the car is on safety boost, and it has a MBC on it. I opened the MBC to look for a boost change, but nothing happened according to the gauge. So, I closed it back up and it's the same boost pressure. I don't mind it boosting low for now as long as it ain't a critical issue. I don't want to blow up the car or melt it down...

Do a boost leak test. You can either buy or make a tester yourself. Making one is pretty easy, I think it cost me $5.00 to make and helped me find mine and made a world of difference.

If he has a MBC, I would find out if he disconnected the factory setup, which it sounds like he did. I also would highly recommend getting an EBC, think of it as a safety measure. Did you try turning it both ways? It may not be hooked up, it should go to both wastegate solenoids. Check to make sure its hooked up to a vac source as well, if it is, the MBC could be the issue. If he bypassed the factory settings, you will not be on safety boost at all. If no boost controller is hooked up, the wastegates automatically open at 6 or 7, as long as a vac source it hooked up. Mine opened at 7.

[RobbieDobbie29]

Where can I find information on making a boost leak tester? I would like to know if It has a boost leak on it.....I am so stoked the Z is running good.......I just want it to be at tip top level.

[nissanfreak12]

I couldn't find how to make it, but here is the actual product.

http://www.boostpro.net/prodtester.html

I ended up using a round plumbing cap from home depot, smoothed out the threads on the end so it would fit snug and not leak. Got a schraeder valve, like from a car tire, drilled a hole and fit the valve through the hole. You don't need a gauge, just set the air comp so it won't go higher than 10 psi and you will be fine. You don't need to set the engine at TDC or anything just plug in and pump air into it.

[RobbieDobbie29]

Now it's boosting around 9-10 psi with the boost controller closed.....and sometimes its at 7psi again. Strange..... Oh and I ran the ecu codes on it last night. Got 5 slow flashes, then 5 quick ones. Is that No Problems Present? When it throws codes, does it cycle through the same code or does it cycle code to code to code. because all i saw was 5 slow and 5 short flashes. Driveability wise the car pulls good. Especially when I see the boost @9-11psi on the aftermarket gauge I hooked up. Me and my bro went at it from a roll last night on a nice empty stretch of interstate. He's got a 90k mile 2004 srt4 neon with a cai and a 3" turbo back exhaust. 3rd gear start @ 40 we were neck and neck till mid to top of 4th I started walking away. Sound about right?

[nissanfreak12]

That would be code 55, no problemos.

Personally I think you should have been able to walk him the entire way, but I just hate neons. Yes, I know its an SRT-4, still a neon to me. Our cars are heavy b***hes, yes that sounds about right. Third gear at 40 his car should have already been boosting, ours I think are getting into boosting. With the PSI jumping around, I still think you have a boost leak, probably from the MBC. Just need to get rid of that and get an EBC. I have the Greddy profec II type S, very easy to control and have yet to have a problem. Found it used for $150.00, but there are a bunch of options out there.

Glad you got the car running good!!!

[RobbieDobbie29]

Well. Just as it got good. I started it today for a quick trip to the local store and let her warm up for about 5 minutes and rode out. Nice and easy in first and rolled on it into second. Boost came on. 7lbs. Safety boost. So, i ran the codes when I got home. Three long blinks, 4 short. Code 34. Det sensor. So i look at the pigtail for the sensor and theres a hokey a** jumper wired into the plug with a resistor on it. Last owner must not have wanted to put in work and change a sensor. So I had a new one laying around, i installed it on the back of the block and plugged it in for a quick check. Got in it, car hit 10-11psi.........Rippin. Wheels start to break loose when the turbos spool in second. So i think i had a bad det sensor.

[nissanfreak12]

That sounds like it, good to hear. Normally the sensor itself doesn't go bad, the harness in normally the culprit. The wires get old and brittle, which obviously break. Im glad you relocated it at least. How about some pictures of the car.

[RobbieDobbie29]

Another weird thing I noticed was while I was under the hood, I reved the engine using the throttle linkage, and it sounded like only the drivers side bov was releasing pressure. This was while the car was in safety boost mode......

[t.mcginley.jr]

That sounds like it, good to hear. Normally the sensor itself doesn't go bad, the harness in normally the culprit. The wires get old and brittle, which obviously break. Im glad you relocated it at least. How about some pictures of the car.

YES!!

Another weird thing I noticed was while I was under the hood, I reved the engine using the throttle linkage, and it sounded like only the drivers side bov was releasing pressure. This was while the car was in safety boost mode......

Probably because it was in safety mode, all kinds of weird stuff happens then. Or the driver side bov is slightly weaker?

[RobbieDobbie29]

Pics to be put up in a few.......both bov's release good now that it's out of safety boost mode.

[nissanfreak12]

I wouldn't focus too much on boost pressure from an engine not under load, it is never accurate. Remember these are not eclipses, srt-4's, evo's, or a regular 4 banger boosted engine. Most of these engines will always boost no matter what. The way our engines are designed, stock, you can drive all day without going into boost. I actually get better mileage in the TT than the NA I had, as long as I stay off the skinny pedal.

[RobbieDobbie29]

[t.mcginley.jr]

Looks like a clean Z! Digging the Nismo seats

[RobbieDobbie29]

[t.mcginley.jr]

^ The Z looks better (of course)

[RobbieDobbie29]

Most definately!