Hokay

So i've been experiencing a problem that resembles somewhat a hesitation prob. But after eliminating possible suspects, i have narrowed it down to a few. But first, lemme describe my symptoms:

The car will run perfect UNTIL im in vtec a few hundred rpm, which at that point, the power seems to be stuttering, as it kind goes on and off. After that, the car will run like **** at any rpm. It will have a lower idle, smell a little of gas, and when i put my foot into it a little bit even below vtec, it will stutter still.

Plugs have been checked along with the cap and rotor, the only thing i could figure it would be the fact that there's a little tear in my ignition coil. It's not arching, but could this be the cause? At this point, nothing else makes more sense than that. What about my MAP sensor? Any ideas will be appreciated. Thanks.

 

fuel leak maybe??

 

hmm, this sounds good, except that would it be possible to only experience a fuel leak while in vtec? Im curious. Thanks man.

Anyone else?

 

that might just be where you can actually feel it??

spectrum of problems is really broad right now

 

I would start with checking the whole vacuum system top to bottom. The map sensor is definitely a viable problem.

So you hit vtec and then while you're still on the gas it begins to stutter? That almost makes me say do a compression check....

How about the catalytic? Whats the situation there? Stock? Hi-flow?

 

Hmm, well, my cat is stock, and yes, when im on the gas in vtec it begins to stutter. What really trips me up is what happens to the entire feel of the car once vtec is engaged and the problems i described above occur.

I think it's also worth noting that once these problems do happen, it takes about 15 minutes of normal driving for the car to re-adjust itself and run normally. This makes me want to say that it's a sensor somewhere. Could it possibly be an o2 sensor that's all messed up? MAP sensor?

Thanks you guys.

 

hrm.....honestly it makes me think something wrong is happening in vtec and maybe the plugs are getting soaked or something....

If it was a bad o2 sensor causing it, something that extreme ought throw a CEL. The map sensor is usually either good or broken, there isn't really any gray area there....it would throw a CEL if it was bad....and if the vac line was bad it wouldn't take getting into vtec to expose the problem....

I'm thinking the cat could be clogged....maybe try running it open header a bit and see what happens

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bb4ever &raquo;</TD></TR><TR><TD CLASS="quote">hrm.....honestly it makes me think something wrong is happening in vtec and maybe the plugs are getting soaked or something....

If it was a bad o2 sensor causing it, something that extreme ought throw a CEL. The map sensor is usually either good or broken, there isn't really any gray area there....it would throw a CEL if it was bad....and if the vac line was bad it wouldn't take getting into vtec to expose the problem....

I'm thinking the cat could be clogged....maybe try running it open header a bit and see what happens </TD></TR></TABLE>

Hmm, i agree with the sensor issue, i mos def would have a cel. But yes, it does seem as if the plugs are getting soaked, which would support the smell of gas and stuttering, due to a form of flooding i presume.

In either case, it just feels like the car runs way too rich after vtec, like the ecu is not telling the car that it isnt in vtec anymore.

This problem sucks, i want my vtec back!!!

 

Alright, hope I can help with my experience. When I dynoed my car (new cap, rotor, and spark plugs) it hesitated around the VTEC point after 5 runs, swapped plugs, wires, and eliminated my MSD, still the same. It ended up being my coil wire arking and that solved the problem. There's one thing you can check on yours. Try not to just check it visually, start swapping or changing it. Another thing is that it could be your plug wires, hard to believe but my brothers integ hesitated when you gun it, swapped almost everything from my integ and no solution. I finally swapped out the wires(last thing we did and off he went all the way to VTEC. Problem solved. We bought a HENNY and called it a day. Good luck bro.

 

I suspect it's your car running in limp mode. My car ran amazing until i accidentally broke off the knock sensor on the back of the engine. Instantly sending the car into ignition retard, and lots of fuel dumping into the combustion charmer. If you have a check engine light. Get it checked and fix whatever the problem is. It'll allow the computer to come out of "Safe Mode" for whatever reason your car has decided to go into. It feels like it's an ignition problem, but it's actually the ECU. Just to let you know the ecu will store codes that are intermittent and not throw the CEL but have "Pending Trouble Codes". Which can still be checked @ Auto Zone for free. Diagnostic plug is located under the cup holder. I would say crawl under your car during an oil change and make sure the knock sensor is in good shape and the connector is plugged in (located Directly above the oil filter and beneath the intake manifold). Another thing it could be is a vacuum leak. There r minimal vacuum hoses on the h22a1 so just make sure everything is plugged in.

 

Vtec solenoid?