Ok, my 2003 FINALLY hast he Vortech kit installed. Under boost you can feel surges as if it really wants to go but cust back (timing?) a little.

Now, yesterday went for a two hour drive. Maybe everything was hot because I was driving at lower speeds, but I dropped to second and nailed it and the car fell flat on it's face as if the ECU (or piggyback computer) cut fuel until I got off the throttle. I got the car out on the freeway and same thing - in 4th dropped eased into boost then dropped the hammer and the car felt like I nailed the brakes. I do not know if the ECU/computer is detecting detonation or what, but the car falls on it's face. Anyone have any experiences like this or know what this is?

Thanks for your input,

Derek

 

Possibly hitting the rev limiter at 6600 rpm..

 

You either need to turn your VDC off (if you have not done so) or you need to get your car tuned.

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What else does the car do? Are you getting a slip light? Do you have to turn the car off and then back on before it will run normal.

 

random thoughts, how's the belt condition and how are your tires? Are the tires stock-ish? I agree that it could be VDC/TCS or a tuning thing.

another possibility is maybe one of your plugs has fouled or you're running too rich and putting out spark?

What's your A/F reading when it happens?

 

If its doing it in 4th gear on the highway . I wouldnt think it would be tire spin and setting off the VDC/TCS .

I would first check to see if you have any loose IC pipe connections and vacuum leaks . But my first guess would be your tune is way off and your going pig rich .
Do you have a A/F gauge ? if so , what does it read when this happens ? Do you have a boost gauge ? and what does it say right before this happens and while it is happening ? Thoughs two thing can tell you alot on whats going on with your car .

 

The tires (and wheels) have only about 500 miles on them. The SC belt has only about 3 hours on it, everything is all new. I get a little slip in 1st but no other gears.

As for tuning,t he Vortech came with the Split Second piggyback box so not sure what tuning can be done on that. I need to have it dyno'd to see if we can get some A/F readings. I would like to have an A/F and boost gauge installed, need to find a local shop can do the install.

Thanks for your posts. I am gonna put a few miles on it tonight to see if the issue persists.

Derek

 

That is almost exactly how if feels. I do not remember the RPM being that high but I know it revs a little quicker now than before (I would like a LOT quicker!)...

I turn traction control off as soon as I get in the car each and every time I drive. I really hate that annoyance.

I am almost afraid to push it as I do not want to damage anything. From what I hear the Vortech kit is fairly stable (as stable as FI can be) on the 350Z. Thanks for all your feedback.

 

You need a A/F gauge at the least . Dont push it at all till you find out where its at . AN A/F and boost gauge should have been installed when the kit was...no if ands or buts about it

 

Booger, thanks for the feedback. You are right. I need to find someone to install these essential gauges now.

I got in the car tonight (sat for a full day.. now about 70 miles on the Vortech) and it would not start. I ran the starter.. Ran the starter.. Ran the starter.. I checked all the fuses, let the car sit for about 15 minutes.. Tried again and it finally kicked over. THANK GAWD!!

I took the car out to check some of the things that were posted above. I have yet to WOT in first gear. I did several smooth roll-ons in different gears (to assure this was an issue in more than one), and the cut out only happens at WOT and is always in the 4k range. If I roll through the throttle to 75% it is fine, as soon as I WOT at arounf 4k to 4.2k, the car cuts out. The cut out is severe, as if I shut off the ignition with the key. It is a violent

I do not know what the Split Second computer watches, but it is almost as if the car leans out and something steps in to assure there is no damage by cutting off the fuel. The engine just dumps when it hits WOT in this range, therefore I thought maybe the FMU is not kicking in. I checked the fuse to the FMU and it is fine, but the jackasses did run the + wire down near exhaust manifolds. Damnit..

Thanks for the feedback.. =)

d

 

Did it Rain?

Again - I remember Split Second Box after Rain

Those POS have no water-proofing. Your discription - reminds me of a post months ago. Water makes a working system a "*****" when wet.

Something of that - Soulution replace SS Box.. None are safe, with out sealing them with RTV.

Cheers Amy -

Search it yourself...

 

Some member post this link before...helpful for any FI set up
http://www.alteredatmosphere.com/mm5...y_Code=350Z_EM

 

Well..if it did get wet . Its because the battery compartment got water in it . I suspect it is either going pig rich , the SS box is faulty , or the tune in the ss box if F-cked up .

 

Icing on the cake: The car will no longer start. The car turns over fine.. Over. .and over.. and over.. and over.. Back to the damn shop...

 

Mine has this problem. I have the ATI and it surges badly. I told my tuner SAFE and that they did. My wideband goes to 10.0 at WOT - so its probably even richer then that and I think that is some of its problem. I also think the filter is clogged from when I broke a belt and it shredded the hood pad [sending cloth all over the engine bay]. I'm also going to have test pipes installed and going to lean out to low 11's at WOT. We'll see if all that doesn't fix the problem

 

I'm kinda of new to this but if I recall correctly you can pull your plugs to get an idea of what is going on in the engine. Do a search and see what you can find on what the color of the plugs means.