Turbo_Mike

I got this vx recently with 98k on it from the original owner. It had a weird hesistation under 3 grand and partial throttle. If you bring it up past 3grand with a steady foot it kicks in and pulls good after that. Also in neutral it idles pretty low and seems to be missing.

I have put a new cap, rotor, plugs, wires, and fuel filter in it. What else could be causing it to do this. Piece of **** is pissing me off, and its barely getting 300 miles to the tank in a combination of city/highway driving.

I cant continue to go through it dumping all sorts of money on it because i plan on swapping it eventually anways. Where else to look besides maybe injector cleaner which i havent tried yet, but have never had luck with anyways.

SVOboy

Well, up to 3k is the vtec-e range, so mehbe something is up with the vtec not engaging properly.

skrewdriver88

**** i get only 250 miles on a full tank of gas in my 97 HX. But bump for you

kaiba

I notice that too on my VX. But only happen on very cold days.

Turbo_Mike

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kaiba &raquo;</TD></TR><TR><TD CLASS="quote">I notice that too on my VX. But only happen on very cold days.</TD></TR></TABLE>

hmm interesting

Whats the tank size on the hx? i think the vx is 9 gallons yes?

Are you saying "vtec" engages AT 3k??

littleredcivic

your symptoms are normal. there is a tech bulletin for that. the weird hesitation is the ecu going from ultra lean to standard burn. the ecu is slow to react. the low idle is from the ecu reducing engine speed to save gas while waiting at a light. you will see that it also runs ultra lean at idle sometimes. 300 miles to a tank is about right for normal city driving that is mixed. once you get on the highway and cruise, you can get up to 400 someodd. the epa had this crazy number but i have never been able to obtain them. cleaning the injectors will help performance, make sure the air filter is clean. the air filter condition makes a big difference on this car.

eXcelonTypeR

I'll tell you one thing about those VX motors, things are tanks. Beat the **** out of mine for a year and a half hit the revlimiter more time then i can count. Back road bruising and "high-speedruns". Drove everywhere with a heavy foot and still got 30+mpg. Swapped the motor out when my waterpump gear sheered off when it was warming up one day

NoBottleJustThrottle

damn, I barely get 200 miles on a tank in my 92 Si. Granted I have a B16A, but my foot isnt too heavy, and I have lots of freeway driving.

pumatec8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skrewdriver88 &raquo;</TD></TR><TR><TD CLASS="quote">**** i get only 250 miles on a full tank of gas in my 97 HX. But bump for you</TD></TR></TABLE>

damn...you should be doing better than that in an hx...i have at least one o2 sensor out and i am still making 300 miles per tank...

littleredcivic

driving habits and the condition of the vehicle will make a big difference in fuel consumption. just carrying around extra junk in the car makes a difference...


you jacked my avatar.

SVOboy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MIKE JONES &raquo;</TD></TR><TR><TD CLASS="quote">
Are you saying "vtec" engages AT 3k?? </TD></TR></TABLE>
Vtec-e, no need for paratheses, because it' s not fake vtec or anything, actually took honda a lot of work to get it done right...and it is engaged up til 3k, it disengages at 3k. 12 valve engine under vtec-e, reduced pumping losses and leans the thing out.

skrewdriver88

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pumatec8 &raquo;</TD></TR><TR><TD CLASS="quote">

damn...you should be doing better than that in an hx...i have at least one o2 sensor out and i am still making 300 miles per tank... </TD></TR></TABLE>

I have already changed oil, put in a new fuel filter, plugs, and air filter and still can only get 250 miles on a full tank. What else could i do to help?

SVOboy

If you're only getting 250 you prolly need to do something serious, cuz that's fucked up, should be able to get like 40 mpg out of one of those things easily.

Turbo_Mike

Thanks for all the info guys, much appreciated I forgot to mention i put a new air filter in as well, but i guess the car is running about "normal" Lil different then i'm use to with my turbo b16 and gsr

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eXcelonTypeR &raquo;</TD></TR><TR><TD CLASS="quote">I'll tell you one thing about those VX motors, things are tanks. Beat the **** out of mine for a year and a half hit the revlimiter more time then i can count. Back road bruising and "high-speedruns". Drove everywhere with a heavy foot and still got 30+mpg. Swapped the motor out when my waterpump gear sheered off when it was warming up one day </TD></TR></TABLE>

LMAO, guess i need to pay a few visits to rev limit to get her going

littleredcivic

250 a tank is ok if you sprint around and don't drive like a slug. if you want better milage, make sure you are using 87 octane and shifting when the shift light comes on. don't press on the gas more than 50% when accelerating.

Sleepy_Red_hatch

haha i also have a VX, that Z1 is seriously a SOLDIER!! i have coupled it with a EX (candian Si) tranny since a bearing grenaded in my long *** VX tranny and now im eating any econo car on the road, rev-limit shifts, crazy rev-limit-handbraking doghnuts accelerating to redline through corners....that ****** just doesnt die, too bad its going to be replaced by a GS-R in spring

Built B16A

i'll shock all of you guys.

i too have a VX... but mines TURBO! hahah... yeah, i took my 92 with just over 228K and turbo'ed it with a DSM T25.

even though i went through issues of the E-VTEC and my EMS, i switched over to the P28 and ran uberdata.. when i enter VTEC, it hesitates VERY notiabely. its nature of the beast.

im running around on 7 PSI and have NO regreats.

if i take it easy, i too am getting close to 300 miles per tank.

Built B16A

im also searching around the boards trying to find an answer to fix this hesitation. i know what the car is doing... as someone else stated. the ECU is going from econo burn, to "haul *** mode", and its switching over.

so what i want to either do, is write a new basemap resembleing a DX and lock those other 4 valves in all the time.

with my EMS, i can disable VTEC, so i might do that.

MugenHonda

bad injectors cause misfire.
It's something that many people overlook because it's not as easy to change.
I remember on my old 240, injectors were prone to always go bad

Bonez21

subscribing*

Bonez21

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenHonda &raquo;</TD></TR><TR><TD CLASS="quote">bad injectors cause misfire.
It's something that many people overlook because it's not as easy to change.
I remember on my old 240, injectors were prone to always go bad
</TD></TR></TABLE>

not neccesarily because in my case i had the injectors replaced as well as a few other things

schardbody

im only getting 27 mpg with my 92vx, it sucks, no power, and no economy, time for a swap. i got a bad o2, and i can get a z6 swap for $600, i would rather do that than spend $350 on an o2.

SVOboy

Why the expletive would you spend 350 on an o2? Try shopping for at least 15 minutes...

schardbody

you must not have a vx/cx. the factory widebands are $350, cheapest i have found is like $290.

SVOboy

CX uses a 1 wire, 40 bucks, then the vx 5 wires are not that much. I wasn't trying to be mean, just shocked.