Hi, I have a 1994 Honda Civic Ex manual transmission with a V-TEC motor that has been giving me problems. Once the car has reached operating temperature (about 20-30 min), the rpm's fluctuate up and down when accelerating. This only happens when you accelerate making the car impossible to drive because it stalls.

Any help will be great.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aguilasrafa10 &raquo;</TD></TR><TR><TD CLASS="quote">Hi, I have a 1994 Honda Civic Ex manual transmission with a V-TEC motor that has been giving me problems. Once the car has reached operating temperature (about 20-30 min), the rpm's fluctuate up and down when accelerating. This only happens when you accelerate making the car impossible to drive because it stalls.

Any help will be great. </TD></TR></TABLE>

your check engine light hasn't came on has it?

 

no, my check engine light hasn't come on

 

you know what it can be?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aguilasrafa10 &raquo;</TD></TR><TR><TD CLASS="quote">you know what it can be?</TD></TR></TABLE>

try replacing the pcv valve. sometimes they get clogged and cause the motor to fluctuate.

also, when was the last time you did a tune up?

 

where is the pcv valve located at? I just did a tune up but didn't change the wires though..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aguilasrafa10 &raquo;</TD></TR><TR><TD CLASS="quote">where is the pcv valve located at? I just did a tune up but didn't change the wires though..</TD></TR></TABLE>

eww...that can be the problem (if the wires are old enough). yeah, i just reread the post and noticed that you said it stalls as well.

go ahead and replace the wires and the pcv valve should be located on the intake manifold.

here this link as a sketch:
http://www.thehondapartsstore....ch=no

item number 6 is the valve. it is a cheap replacment, like $3.

 

one more thing. the rpm's only fluctuate when you accelerate the car. in other words, if the car is just turned on, the idle is normal.

 

hmmm...check all the hoses around the I/M. look for any broken, crakced. or cut vaccum hoses. you might have a vaccuum leak.

 

Sorry. I don't know anything about cars. what's the I/M?