What can we do folks? LS swap?!? haha no but really i am growing more and more weary of driving on the interstate because anything over 60mph the 3.3 liter SUCKS... Red lining the damn thing doesn't even work.. a slight incline on the interstate and my speed decreases no matter if i floor the poor thing. its a chore to drive to work every day since i cant even keep up in the slow lane.
So i am wondering if a cold air intake or short ram would make any noticeable improvement. Or anything else? Super charger / turbo? anything at all?? The 3.3l actually doesn't need a whole lot.. and I'm not trying to race or anything at all i just want to be able to drive WITH traffic. i mean damn ive not come across a single car during my travels that struggles so greatly on the interstate. I just want to be able to maintain 70mph while on a slight incline.
Michael
1999 QX4 Need more.. no ANY, power!
-
OneSpiritBrain
- Posts: 12
- Joined: Tue Jun 14, 2016 3:24 pm
- Car: 1999 Infiniti QX4
Re: 1999 QX4 Need more.. no ANY, power!
I have no problem keeping up with traffic - even on an incline. I have 155K miles with nothing but stock components. Granted, that engine is only rated at 168HP but it sounds like you have some mechanical issues to address. How many miles on it?
Ever run a compression test? Have any pending trouble codes? I would advise against any alterations in the intake system. Oftentimes changes in them will cause the MAF sensor to send incorrect readings to the ECU and your performance will suffer.
Ever run a compression test? Have any pending trouble codes? I would advise against any alterations in the intake system. Oftentimes changes in them will cause the MAF sensor to send incorrect readings to the ECU and your performance will suffer.
-
atraudes
- Posts: 1106
- Joined: Thu Jan 10, 2013 7:46 pm
- Car: 2001.5 Infiniti QX4 4WD
- Location: Sammamish, WA
Re: 1999 QX4 Need more.. no ANY, power!
Yeah, I'd forget performance mods for the time being and focus on getting it back up to par since it sounds like you're not making anything close to stock HP. You shouldn't be struggling to keep up on the freeway. I'd recommend getting a cheap code scanner if you don't already and see if there's any pending codes. Take a look at the simple things like spark plugs, wires, fuel filter, and air filter. All of those can cause significant drains on performance if out of date.
Check your fuel pressure and make sure it's within spec.
Running Seafoam through the intake gave me some extra ponies in the butt dyno too. If you do that, use a vacuum hose that's attached to the intake plenum, not the intake ducting
Then, focus on things like hard starts, smoke out the tailpipe, rough idle, etc. which can point you to things like clogged injectors or leaking fuel pressure regulators. Upstream oxygen sensors are also not terribly expensive (though hard to replace) and can give you a performance bump too since they get lazy over time.
Once that's all done, there are CAI systems you can get, aftermarket headers and exhaust, electric fan conversion, and a number of other performance modifications.
Check your fuel pressure and make sure it's within spec.
Running Seafoam through the intake gave me some extra ponies in the butt dyno too. If you do that, use a vacuum hose that's attached to the intake plenum, not the intake ducting
Then, focus on things like hard starts, smoke out the tailpipe, rough idle, etc. which can point you to things like clogged injectors or leaking fuel pressure regulators. Upstream oxygen sensors are also not terribly expensive (though hard to replace) and can give you a performance bump too since they get lazy over time.
Once that's all done, there are CAI systems you can get, aftermarket headers and exhaust, electric fan conversion, and a number of other performance modifications.