Hey fellas

Well the past week or so... the Z has been the bain of my existence lol. Iam having some sort of throttle issue . I CANT figure it out!!! so here Iam.

the problem:

Well the car starts and idles perfectly fine, just like a new car. I can take it out It drives perfectly fine as well ( normal driving ).. BUT... ( it doesnt matter what gear iam in ) when I go WOT.. it just doesnt go anywhere?.. I have absolutely no throttle response .. It doesn't " bug " or anything.. I can be at 50mph.. go WOT.. and it just doesnt pick up, doesnt go anywhere whats so ever.

What Ive one :

I cleaned the MAF
I cleaned the Throttle body
I replaced/swapped the MAF
I replaced/swapped the Throttle body
Swapped the stock air box
Removed battery
Re-set the ECU
Re-set the throttle position learning
Re-set idle/air
NO CEL

----------------

Iam out of options ... any ideas? b4 nissan rips me off??

Thanks!!

 

good luck!

 

Is there any way you could use a scan tool to make a recording while you duplicate this problem and post the values?

If you rev it in neutral does the engine respond as it should?

 

what kind of scan tool?? ^

it revs fine.. in the low rps.. and throttle response is sharp.. but if i try n rev it to liek 5-7k.. it goes there ( no hesitations ) but just like kinda slow... b4 it used to jump to redline like a bat outta hell.

 

Any kind of scan tool that has the capability to record would suffice. Some parameters that would be good to monitor would be RPM, Load, O2 sensors, Throttle %/Throttle angle, Timing advance, MAF, fuel trims, etc.

Are you on the stock ECU or using a stand alone?

 

stock ECU... I used to have vortech ( see sig ).. and did run a utec.. but everything is put to stock now.. and then .. this problem..

 

Can you find someone who has the newer Snapon Verus scan tool.We just got it a month ago and it has incredible capabilites.

 

wow i have the samething going on with mine

 

nope =(.. that name is really new to me... Ill do a search on it... is it a lot of $$$?

car is at nissan now.. so we will see what they say...

 

HAHA nvm.. it costs 8999$ =o...

 

BUMP for help

Well nissan couldnt find the problem and they said i need to put the stock exhaust back on? like wtf?...

Iam going to take the plenum out again and put the stock fuel pump back on and see

 

That's so clearly symptoms of the MAF, but then again you cleaned/swapped that already. I don't know bro, either fuel or fire relate obviously. Have you swapped plugs, checked the coils, checked the fuel pump?

-Paramy

 

No CEL? Wow... my guess would be TP sensor or incorrectly learning in the pedal dance. One time I did the pedal dance incorrectly and the car ran just like that... like 1/4 throttle was all I could get when it was floored.