My car seems to bog at low RPM's, it diles real funny, fluxuates then theres like no power before 2500rpm, then it just feels like vtec kicks in. What do you think the problem might be? I cant seem to figure this one out. I have an LS with ITR pistions, port/polish, crower valvetrain and 6403 cams, cam gears, fpr riser, i/h/e ect.ect.

Maybe there is a cam gear settnig that would smooth things out? Any help greatly appreicated. Also I have a slight inclination that I may have a vacum leak somewhere, the only empty nipple I can find is on my TB twards the bottom.

 

cmon, im taking suggestions please!

 

dang your talking bout itr piston, port polish, some internal work ....you can run into some problems.

Here were just talking bout basic bolt on like how to install headers, intake, and exhaust.

i think you should call up some shops and talk to them 1 on 1

 

If it used to run fine with the current mods then I would say vacuum leak. If not, may need a hondata to straighten it out. That is a lot of mods for a stock LS ecu to handle.

 

i got the same issue!! car starts up and idles uner 1k when its cold. i cant figure out. car was running fine til now. btw, i have pnp head and all the goodies too. the thing is..its been running fine all this time. the last thing i did was change out my sparkies for the bosch platinum 4.

 

sorry this is kinda off the topic but what are you running in the 1/4 mile when its running good? what did you dyno at?

 

you think so? i have almost the same mods, but with b16 pistons and the 404's. stock ecu cant handle it? thanks

 

wasup matt..... stop by my place or call me before you go back to maryland!

 

check the timing, it will cause the bogging and non smoothness if it is not set correctly.

 

did this start happenin when you installed all those parts? cuz if this is the case... then obviously its right in front of you. at first i thought it might be some spark plugs or whatever.. but it could be a variety of things at this point.

 

Ummm...have you had the car tuned?

 

Fuel pressure. That and check your O2 sensor. Had a similar problem til I tuned a few things on my motor.

 

you think my gutted cat is contributing to this problem? my O2 sensor is plugged into the cat, but it is gutted. This is the first thing im changing.

 

Platinum +4 = UUUGGGHHHHH

NGK all the way!

Change your spark plugs, there is a possibility that those plugs could be doing it!
I put platinums in my 626, biggest waste of $50... 2 days later I put NGK vgrooves in there, holy ****, world of difference! The platinums actually made my car run like ***!