ok i have a fully built engine but ever since the build i don't feel like i have ANY v-tec and rev limiter kicks in at 6200-6400 rpms. It throws the code vtec malfunctioin.. i have a vafc previous to this and i re-wired it all up again to stock and i looked over the whole thing again could it be the sensor is clogged, a wiring problem? i wish a had someones stock ecu so i can swap it out real quik to see if it does the same thing. it's really pissin me off b/c i've been tryign to figure it out for a long time now. has anyone had this problem. Help.

 

it might be a faulty Vtec solenoid OR it is in the wiring somewhere.

 

i narrowed it down to either v-tec selonoid clogged or broken, my wiring should be fine because i went over it twice but it coudl be that, or my ecu.. what do u think?

 

bump working on it now, still no luck.

We just replaced the MAF on the TB with a known working one from a 98 GSR, made no difference. Anymore ideas? Thanx

 

check the VTEC solenoid

 

already did, disasembled everything, cleaned screen, also swaped a good vtec pressure switch in, no good. Im thinking wiring? could it be anything else?

 

bump for an answer please

 

I had the exact same problem after doing a tranny swap in my '93 vtec. I didn't hook up the vss wires properly. After hooking them back up everything was fine.

 

Any codes? Your probably in limpmode.

 

it was throwing 1259 but we swapped the sensor with my friends car here and it's still not working.. i took apart vtec and cleaned it and used his sensors so it's not there, we r reviewing my wiring from when i took out my vafc now.

 

bump, someone help us out, im sick and tired of working on this POS

 

Did you directly connect the solenoid to make sure it is working?

 

check the vss (vehicle speed sensor) it does sound like the problem that a friend of mine had with his.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BrokeLude &raquo;</TD></TR><TR><TD CLASS="quote">Did you directly connect the solenoid to make sure it is working?</TD></TR></TABLE>

im with him..

Run a wire from the batter to the selenoid and see if you can hear it turn on and off.
also, have you checked your oil yet?

 

no we havn't done that but we will . i'm guessing you hear it click on? yes i have checked my oil.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IhAvEaLuDe &raquo;</TD></TR><TR><TD CLASS="quote">no we havn't done that but we will . i'm guessing you hear it click on? yes i have checked my oil.</TD></TR></TABLE>

Yea. have the car idling... if it clicks on, it should damn near kill the engine. It most likely will stall out.

If it turns on, then you are just not getting power to that selenoid for some reason.

 

i bet its the wiring for the vtec solenoid to the ecu. Very easy to check. Make sure its grounded the pressure switch is to the right pinout and the vtec solenoid is to the right pinout.

 

ok thanks guys i am ganna try that and see what happens from there.. my next option is swapping a h22 ecu from someone else. Anyone willing to let me use theres for like 5 minutes?

 

bump, would a bad selinoid cause a "fuel cut" at about 6200? When does the vtec engauge on a 97 prelude anyway? When we check the VSS what are we looking for, i know when my car was being retarted, i had the same type of problem, and one of my pins on the vss plug was coroded, could this be a similar deal? My Speedo was messed up tho, his is working fine...anymore ideas? Thanks

Also does anyone have a pinout for a 97 prelude non-sh?

 

The ECU limits the RPM at 6500 RPM with no VTEC for 3 possible reasons:

1. It thinks the coolant temperature is below 60oC. (engine cold) (ECT sensor)
2. It thinks the car is doing below 20kph. (car stopped) (VSS)
3. It thinks the VTEC solenoid coil is bust.

The VTEC control wire comes from A4 on the ECU connector and is a GREEN/YELLOW wire.


Hope this helps.


Modified by jmcclell at 12:28 AM 9/22/2004

 

ya i had the same problem once , then i learned of the 6200 cutoff if the car isnt warmed properly.Just let id warm up a little before driving

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jmcclell &raquo;</TD></TR><TR><TD CLASS="quote">The ECU limits the RPM at 6500 RPM with no VTEC for 3 possible reasons:

1. It thinks the coolant temperature is below 60oC. (engine cold) (ECT sensor)
2. It thinks the car is doing below 20kph. (car stopped) (VSS)
3. It thinks the VTEC solenoid coil is bust.

The VTEC control wire comes from A4 on the ECU connector and is a GREEN/YELLOW wire.


Hope this helps.


Modified by jmcclell at 12:28 AM 9/22/2004</TD></TR></TABLE>

4)it's not getting a signal from the VTEC Pressure Switch...

 

ok i had my car run on my mechanics honda computer code puller thing. and it was reading my engine temp at 194 it was reading my speed and when we went for a ride it was sayin that vtec was kicking in. But yet the rev limiter still kicks in at 6400 rpms. i didn't do the wire to the vtec selonoid yet tho. but the ecu says it's kickin in.....??? i guess it's swap out an ecu with someone elses ecu or could it be something else?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IhAvEaLuDe &raquo;</TD></TR><TR><TD CLASS="quote">ok i had my car run on my mechanics honda computer code puller thing. and it was reading my engine temp at 194 it was reading my speed and when we went for a ride it was sayin that vtec was kicking in. But yet the rev limiter still kicks in at 6400 rpms. i didn't do the wire to the vtec selonoid yet tho. but the ecu says it's kickin in.....??? i guess it's swap out an ecu with someone elses ecu or could it be something else?</TD></TR></TABLE>

attach the damn wire..

why ask for our advice if you are not going to do it?

 

i just tested it.. it clicks. what now?