velisma

Well, the weirdest thing happened today while driving my car. I have a JDM GSR w/ ITR cams in my 94 VX and right before the crossover the car will bog hard. I understand that it could be oil pressure, VTEC solenoid ground/cleaning, etc. The weird thing is I tried to get the engine to crossover several times in a row back to back and every time it would start bogging at a lower RPM. First time was at the correct crossover (5000-5500), second time was around 4000rpm and the last was around 3000rpms and then I just stop and parked the car to jump on here, research and post. Car was crossing over fine just the day before. I'm a little stumped... No CEL popped up or anything and oil level is good.

velisma

38 views and no answers? Is the issue I'm having really that hard to solve... yikes!

rick_rabies

what ecu are you using? is it chipped?
sounds like a safety cut.

velisma

I'm running a stock OBD1 JDM GS-R calibration on a Hondata S300 w/ lean and overheat protection. The calibration also has the knock sensor deleted out of the tune (engine came w/ a broken knock sensor). I checked today and the dipstick only had oil on the tip of it so I'm guessing low oil. So, I put some 5W-30 in it (engine is running 10W-30) because it was all I had. Both the 5W-30 and 10W-30 are Mobil1 Synthetic btw.

rick_rabies

^its not that picky on oil other than the amount in the motor (at least older honda motors)

any difference since added oil?

if you o2 sensor is wrong/messed up and giving a bad reading the lean/rich protection will bog down your car when you get higher rpms.
my k24 does this. i had to disable lean protection becase i couldnt go over 3k rpms. because i had a messed up o2 sensor

peejEJ8

this. lol but change the o2 sensor instead of what he did lawl

velisma

Well, added the oil and now it hits VTEC when accelerating hard (i.e. 1st gear and stomping on it) but it is still bogging when, lets say... doing 20-25mph and doing a 3rd gear pull w/ my foot to the floor. It bogged at about 3k this time... Weirdness. Anyway, I would've investigated further but I was coming back from the store w/ groceries for dinner when I did all this so I wasn't really able to take my time (hungry kiddos and wife!) lol!

rick_rabies

i had also changed o2 sensors but nothing would work. even retraced all wires and o2 sensor still read funky. jus left it. i dont care anyways


i would jus do a full oil change. and do a compression test.

velisma

The last compression test I did was about 2 months ago.
Cylinder 1: 230
Cylinder 2: 230
Cylinder 3: 240
Cylinder 4: 240

rick_rabies

^my guess is that its in your tuning.
hook up a laptop and click read and open the file and see whats going on.
im sure there is an option or some kind mode clicked on or off.
my kpro is like that. 1 wrong click off or on on sumthing messes evertynign up and confuses people.


who tuned it? take it back to them.

velisma

It's the bone stock calibration that came w/ the Hondata S300 software. No one has tuned it.

NotAJDMFanBoy

Sounds like you're low on VTEC fluid.
Do you have access to another ECU to try? And this is just a crap shoot, but since the ECU goes off the engine speed for when to engage VTEC, could it be something with the distributor?

velisma

Nope, filled the VTEC fluid up last night. lol!
Possibly could be the distributor, but I live way out here in V8 country and no imports in sight AT ALL so having a "friend" who has one I can try probably isn't gonna' happen. Blah...

rick_rabies

^what state are you in? you gotta make a few friends with some knowledge and oldshool skills that can help when you need it.

velisma

I've made a few but none that know as much as I'd feel comfortable to let tinker w/ my car. I do have some friends but they're about 1-2hours away from me. I'm in Texas but in an isolated city. Again, about 1-2 hours from anything considered civilization. lol! I took the distributor cap off yesterday to investigate and the rotor has a spot (brown burned tip) on it where I would assume it is igniting the spark plug wires. I'll have to post pix this wknd. Hopefully you guys will keep checking this thread until then.

velisma

Well, today I did a full oil change (oil & filter), changed spark plugs (brand spankin' new NGK Iridium BK6's) and the car is still doing the same thing. It also sounds like the engine is trying to rev but can't when it does this. Maybe that is considered "bogging"? I would let up off of the gas pedal for a sec when it did this and then immediately re-engage it and it would climb about 500-1000rpms and catch again. It stopped completely and then did another hard run. It went all the way to red that time but no VTEC engagemet. Here's the kicker, I tried it two more times and it hit VTEC each time. I'm stumped...

41184ek9

how bout an oil pump....do u have an oil pressure guage? if u have enough oil and the pump is worn it aint gonna make it push the right way

velisma

Here's a video I took last night. It only seems to happen when I put the gas pedal to the floor in a low gear.

1) VTEC engaging in 1st gear and 2nd on a hard pull
http://www.youtube.com/watch?v=ch7l4B4wrlg


2) You'll notice in the very beginning the engine bogging as I slowly roll into it and then I step on it again and finally engages.
http://www.youtube.com/watch?v=IAkhRKGu78w

Sorry if it's hard to see. The SRS light is on...
I have a few more videos of pulls I did last night so if you guys want me to load them up I can.
p.s. I'm not sure if it's an oil pressure problem, fuel problem or voltage problem. I notice when I go to fill up w/ gas that sometimes the car will bog when I start it up and try to pull out of the gas station. Then it's hard to get it started but then eventually will. That has been an issue since my last swap as well. I'm running a walboro 255 btw that is only a year old.

velisma

One more of the engine just bogging and bogging AND BOGGING w/ the gas pedal down to the floor. blah...

http://www.youtube.com/watch?v=xABLfE-_eQo

P.S. This was when I first started doing pulls btw... the previous videos I posted are after I did this one

cookiemonsta08

how are yor plugs?

velisma

good, the old ones were a light brown like they're suppose to be. No damage to them or anything.

velisma

bump

Kluiz

reset your ECU and reprogram your s300 or take S300 out as stock ECU and test it.

velisma

Well, I reloaded the stock JDM GSR calibration and had the display up to do a few pulls and noticed that the injector pulse was hitting about 10.?? it was going from white to red numbers so I'm guessing that's not good. I also floored it in 5th gear going about 30-40 and noticed that the injectors zero-ed out completely. I'm guessing fuel cut? Voltage was around 14.2 at idle.

velisma

bump