I have a stock b18c i/h/e on a chipped/tuned p28. vtec comes in at 5200, but it bogs in and out from then till redline and im losing power.
ive already changed: sparkplugs, sparkplug wires, fuel pump and fuel filter, swapped ecu's with a friend, replaced vtec solenoid screen, checked for a clogged cat, replaced the whole dizzy and timed it.
i dont know what else tp do, im short on cash. any help would be appreciated.

 

need help asap!

 

check your oil level

 

you mean bogging as in while driving and in vtec engaging? and RPM is jumping ... is that is so then check your distributor/cap/rotor botton/

 

vtec engages, but it comes in and out

 

that is usually your oil level bring low or not enough oil pressure..your gonna have to check those two things

 

changed the distributer and adjusted timing.. still having this fcking problem >:0

 

I would make sure all of wiring is still intact

 

Check for water in the plug tubes.

I did a complete engine wash, and water got in the #4 tube. It would run find up until about 5000 rpm, then misfire and sputter like crazy to about 7000 rpm.

Blew the water out with an air compressor, changed the plugs, and cleaned the plug wire contacts with a wire brusy and put a dab of delectrolisis grease in there so they wouldn't corrode. No problems any more.

Your vtec engages at 5000? That's wierd. If I'm going full throttle, mine hits off at 4500, and if I'm just easing my way up in the rpm's, it engages at 5k.

 

gonna give that a try

same here.

 

cleaned out the plugs, and plug tubes. no water or anything in there... still bogging

 

Did you check your oil level? I used to have that problem and it turned out to jsut be low oil. =\

 

Hmmm... I'm stumped.

Like said, check your oil.

Are you throwing any CEL's?

 

Oil level is always on point. And no check engine light...

When i bought the car a few months ago the previous owner told me he always used mobile1 5-30 oil. I realized that the car burned a lot of oil, so i did my first oil change with castrol non synthetic 20-50, and ive been using it since i've owned the car (3 oil changes later). This problem has only got worse since i've owned the car, and never did it in the beginning. Would the thickness in the oil have anything to do with this problem?

 

changed my oil with mobile1 5-30; still bogging

 

damn im having the same problem!, but havent change my oil yet since i just got the car on sat.anyway, chime in if you have a solution to this.

 

take off your vtec soleniod and there are two screen filters, replace them..acura dealers usually have them in stock

 

forgot to mention i already did that

 

alright so maybe this isnt a vtec problem then, maybe your car is starving for fuel under heavy load due to a clogged up injector..try some injector cleaner

 

used 2 bottles of the injector cleaner in the past 3 months already.

just finished adjusting the timing on the new dizzy i bought... still bogging FCK#@$!

 

The standard pour-in-the-tank "cleaner" sucks. Get SeaFoam and try that.

 

good advice; seafoamed the whole car out, seems like its running a lot better.. bogging way less. it's still doing it but not half as much. maybe i have A LOT of carbon build up because my car runs really rich. is it safe to use another bottle of that stuff or is it too soon already?

 

It probably wouldn't hurt to try it again, but personally I prefer BG44k.
Clean your air filter, and invest in an adjustable fuel pressure regulator & an ECU chip.

Also, Seeing as you have I/H/R on a stock P72, adjustable cam gears are long overdue. You need to advance both your cams about 8 degrees to compensate for your bolt-ons, which should also reduce further carbon deposits and increase your midrange power.

Otherwise just try using quality fuel, and replace your clogged-up O2 sensors.

 

I bought a whale ***** intake not too long ago, so the filter is basically brand new. My car is on a chipped and tuned p28, but i had even swapped it with a stock p72 my friend had in his car, and it ran the same. I have always used chevron 93 gas since i've had the car too. I'll look into advancing the timing on the cam gears though, and as for the o2 sensors, those are next on my to do list.

I appreciate all the help from you guys.. thanks a lot

 

Don't use SeaFoam too much... It can eat away at thge aluminum in the block and intake mani.