[VR4blur]

I have a 1992 3000GT VR4, and for a while now, my car has been hesitating when you ask it for power. I was woundering if any one has any ideas. It started even before I began putting my performance goodies on it. Thanks!

 

[jon3k]

Are your turbos still spooling? Can u get past the "stumbling" ?
First thing I would check is my plugs/wires if i were you. Once your wires get dirty, they can't keep up w/ spark demand at higher revs. Just a thought - good luck.

.jon

 

[VR4blur]

i belive my turbo's are still spooling. My car seems ok power wise once I get above 4000rpm... but there is still that hesitataion. My wirers are pretty new (Magnicore) and so are my plugs. it is mainly a problem when driving around town.

 

[F27Corsair]

I 100% agree. I had hesitation problems after my J-Spec was put in. I asked the mechanic to put in NGK Platinums at .32 gap, and he said he did. Well when i finally took a look, my suspiscions were confirmed... they were Bosch plugs at .042!!!
With Magnecor 8.5 wires and NGKs @ .030 later, hesitation problem fixed!

 

[VR4blur]

well... I know that the right plugs were installed because I did it my self. I just don't understand it. I have taken it to mitsubishi like 20 times!!

 

[F27Corsair]

How long ago did you put the plugs in? At what gap? How long on the wires? Dont go to the dealership; they only wanna screw you over.

 

[VR4blur]

honestly... it was like a year and im not not sure what the gap was. do you have any idea how to check w/out pulling all that shit off the top of the engine? I think I did the gap to mitsubishi specs.

 

[F27Corsair]

Just check the front 3 if you dont want to dig into it. If you installed them to Mitsu specs (.038-.044 gap), then that could definetely be your problem.

 

[VR4blur]

well... i'll try that. Im a little confuesed. why should you gap the plugs diferent
than the stock specs? Why would that alter my performance?

 

[F27Corsair]

Stock specs arent supposed to be able to handle higher boost, especially on crappy plugs. I guess if you ease up to the higher RPMs, it shouldnt hesitate if its your plugs. This is just my naive assumption.

 

[KD4PWH]

Look here this may be your problem

http://www.3si.org/vbb/showthread.php?threadid=35827

Or if you just want to go ahead and try to fix it with out reading through the whole thread:

http://moojohn.com/fuelpump



Good luck man,

Chris