Hi,

This would be my first post here ... I have been following up on this hesitation issue since it happened to me all of a sudden couple of months ago.

Here are the symptoms:

When starting cold, car runs great. Pulls hard in all gears and RPMs but as soon as the car gets warmed up (usually in about 5 mins), anywhere from 1500 to 4000 rpm car pulls like a donkey! (As in really slow) Once in VTEC though it pulls better.

No check engine light or code... BTW this is a JDM H22a in a 93 SRV (Si VTEC in the STATES)...

Things done trying to solve the issue:

1. New header ... no change
2. New cat ... no change
3. Swapped the mapping sensor ... no change
4. Advanced timing ... no change
5. Cap and rotors ... no change
6. Inspected wires and sparks ... did not change since they looked good.

Was thinking about changing the O2 sensor and the Knock sensor next...?


So after thinking about whether to spend more than $400 dollars for the sensors ... I tried putting new spark plugs in there.

Viola!!! Car pulls real good whether cold or warm, problem fixed.

The old sparks were actually only 2 months old. They were NGK copper ZFR6F-11 I believe ... I replaced those with PZFR6F-11, which come stock with my engine.

Moral of this post:

Before spending all this money for expensive stuff, try putting in Honda recommended spark plugs ... NGK PZFR6F-11 (not hotter or colder just 6F).

I hope this works out for you guys as well

 

Wow, GREAT info.

There are a lot of us with this problem. Many fixed it after changing the knock sensor.

I will try it.

 

I may try this as well.

 

thanks for the info. i will keep that in my mind if i ever run into that problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by staticrex &raquo;</TD></TR><TR><TD CLASS="quote">I may try this as well. </TD></TR></TABLE>

 

+1 i will try it too

jeez all of yall have hesistation like me??? hahahaha

i guess since sparkies are cheap (relative) we should all post results after this, honestly its so simple it might work, i have the coppers in there right now

 

i will let u guys know on monday, and if this is it i will be ******* loving it

 

Oh ... one more thing, if you don't have the stock Honda rotor and cap replace those too.

 

well.....$40 later and new oem ngk spark plugs

and still hesistation.....thanks for the suggestion though

btw when i pulled my coppers out they were black, not white like you posted, so it would seem as though we have different problems

 

My 93 srv feels like a dog in between 2000-4000rpm. I did put all new plugs in, but I didn't gap them myself...I think they might have a bad gap or else I need a new knock sensor .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">well.....$40 later and new oem ngk spark plugs
and still hesistation.....thanks for the suggestion though

btw when i pulled my coppers out they were black, not white like you posted, so it would seem as though we have different problems </TD></TR></TABLE>

If they looked just black, you might have colder than recommended plugs in there. If they look kind a sticky or wet black then there oil leaking in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">My 93 srv feels like a dog in between 2000-4000rpm. I did put all new plugs in, but I didn't gap them myself...I think they might have a bad gap or else I need a new knock sensor .</TD></TR></TABLE>

If you buy the ones from Honda, they come pre-gapped

 

i swapped to OBDI and it went away

 

^how do you swap to obd1?

its a jdm h22a in a 94 prelude...

what would i need to do? i mean its already obd1 but after the swap....i'm not 100% sure its still obd1

 

Knock sensor fixed my hesitation

 

i tried changing to sparkplugs ngk's, but the real problem was my vacuum lines and my sfc vtec controller. i sold the vtec controller, fixed the vacuum leaks and after that the car is running great until now.

i guess we have different kinds of situations. goodluck to everyone.