So ive had this car for about 5 years now, its got almost 150K miles on 'er and up until a couple of months ago she never failed me...ever since ive had nothing but trouble...its been through some stuff, and just recently repaired *everything* i noticed another problem last night... if im running it all the way through first gear then dump into 2nd...the tires will churp then the engine "skips" and bogs down really fast, probably until it shuts itself off...if i kill the ignition and restart the car it runs like nothing ever happened...anyone have any idea of what could cause this!? I havent seen it throw a code for it yet...ill keep my eyes peeled. Any help is greatly appreciated!

 

A sensor problem of some sort possibly..? Maybe the MAP isn't dealing with the quick change in manifold pressure well on shifts and causes the ECU to dump too much fuel, hence the bogging. Just a theory. TPS may also be causing a similar situation... but kinda grasping at straws here.

 

Its most likely a sensor like the other guy said...... Have you ever changed any of them? Ive got an 00 si and my iacv(idle air control valve) went out on me at about 115k..... Thats a lot of miles its time for something to go wrong..... Plus its an 99-00 Si they are ALL cursed!!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blk00EJ8 &raquo;</TD></TR><TR><TD CLASS="quote">A sensor problem of some sort possibly..? Maybe the MAP isn't dealing with the quick change in manifold pressure well on shifts and causes the ECU to dump too much fuel, hence the bogging. Just a theory. TPS may also be causing a similar situation... but kinda grasping at straws here.</TD></TR></TABLE>

Maybe take them off and clean them.

 

ive actually replaced the IACV..that was about 2 years ago...definitely cleaned it since then, tps is a little bit harder to take off and clean..but have also done the best i could with it. Haven't cleaned the map sensor, that'd be a good start i guess...it doesnt do it everytime i slap 2nd, just a few rare occasions...just doesnt seem like it could be too much good for the car if it keeps doing it heh heh...any other help is greatly appreciated as well! thanks guys

 

BuMp...anyone else ever had a problem like this!?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wearyfurball &raquo;</TD></TR><TR><TD CLASS="quote">Thats a lot of miles its time for something to go wrong..... Plus its an 99-00 Si they are ALL cursed!!!!!</TD></TR></TABLE>

well, seeing as a honda, 150,xxx is really not that much. I have seen soo many hondas at 300k and still running excellent, so i wouldn't quite say its a lot of miles!

also, the em1's are not cursed! you bite your tongue!! argg!!!

my em1 is not cursed! don't you suggest it is! ha

 

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

also, the em1's are not cursed! you bite your tongue!! argg!!!

my em1 is not cursed! don't you suggest it is! ha </TD></TR></TABLE>

i wasnt talking about the em1's .... I was talking about the ek Si's.......99-00..... I telling you ask anyone who has had a 99-00 si and more than few will tell you that they have had stupid luck with them.....

 

man youre gunna have to keep that n00b avatar for a while if you seriously just said that..... em1's ARE 99 00 si's (ek si's) wow...just when you thought you had seen it all...anyways, still havent pinpointed the problem...but it hasnt done it since the other night, so maybe its a fluke...still looking into that map sensor a bit more though..also havent really had time to drive it...strep throat is a beeeeeyotch! thanks for the tips...keep 'em comin!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FearTheH &raquo;</TD></TR><TR><TD CLASS="quote">man youre gunna have to keep that n00b avatar for a while if you seriously just said that..... em1's ARE 99 00 si's (ek si's) </TD></TR></TABLE>


Well sorry I wasnt aware that the 99-00 si were also referred as em1.... Ive always known then to be EKs.... Sorry for giving my .02......

 

Yeah, EK Si. Hella rare.

 

yep, i think i did see a Civic Type SI the other day...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blk00EJ8 &raquo;</TD></TR><TR><TD CLASS="quote">A sensor problem of some sort possibly..? Maybe the MAP isn't dealing with the quick change in manifold pressure well on shifts and causes the ECU to dump too much fuel, hence the bogging. Just a theory. TPS may also be causing a similar situation... but kinda grasping at straws here.</TD></TR></TABLE>

Maybe the TPS. the manifold pressure shouldn't have changed much if at all if he floors it again right away. WOT is WOT. All the MAP senses is a lack of vacuum due to the throttle plate being open.

TPS might be an issue. Check your grounds. Did you recently do any work to the car or did something unusual happen recently? Maybe you ran through a big *** snow pile or a puddle and this started happening?

Yes, they are cursed. Here's my story:

I traded my 99 GSR for my EM1 because I got a smoking *** deal. Basically, they paid me more for my GSR than I paid for it a year ago.

Anyway....as I'm driving away from the dealer, the stupid CEL turns on. I figure it's just a loose gas cap. I do all the tune up items on it. It's a used car...I always do an oil change, change plugs, etc. when I get a used car. I also changed the distributor cap and rotor. I ask both my friends that work at honda as techs if I should replace the whole distributor..or just the cap/rotor. They say that the usual tune up for 100k is just the rotor and cap as far as the distributor goes. So I figure sweet..I can get out of it for $30. Then a week later, the cel turns itself off. So i'm pretty satisfied and i'm like "hah...stupid gas cap". It's like -40million degrees that day. So I'm on my way to work after I get out of class, and I'm at the burger king drive thru. The moment the lady hands me my food, the car dies. I had to tow it back to my house using a tow rope (this operation went really smooth). It was FREAKING COLD, though.

Long story short...turns out it was the coil in my distributor. So I had to buy a whole new freaking distributor ANYWAY ...like a few days after I bought a cap and rotor.

I almost had to take my S2000 out of storage (which means driving it in the snow/salt....which has NEVER EVER happened) because I had a full week of school and work. Luckily, my dad was nice enough to say he'd just get a rental car for the rest of the week and I could borrow his car.

It worked out...but what a freaking PITA. It was on a night where I had a 12 hour long day followed by like 3 hours of calc. homework and I had to wake up for class again at 7:30AM the next morning. AND IT WAS FREAKING COLD AS HELL!!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B serious &raquo;</TD></TR><TR><TD CLASS="quote">the manifold pressure shouldn't have changed much if at all if he floors it again right away. WOT is WOT. All the MAP senses is a lack of vacuum due to the throttle plate being open. </TD></TR></TABLE>

I beg to differ. Closing the throttle plate when shifting is going to lead to a noticeable increase in negative pressure in the manifold at that point due to the air velocity, especially at WOT. I would say don't rule out the MAP right away. After all, that's how most piggybacks modify the fuel maps... by intercepting and modifying the MAP signal before it gets to the ECU.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blk00EJ8 &raquo;</TD></TR><TR><TD CLASS="quote">

I beg to differ. Closing the throttle plate when shifting is going to lead to a noticeable increase in negative pressure in the manifold at that point due to the air velocity, especially at WOT. I would say don't rule out the MAP right away. After all, that's how most piggybacks modify the fuel maps... by intercepting and modifying the MAP signal before it gets to the ECU.

</TD></TR></TABLE>

The MAP would sense a momentary increase in vacuum when the throttle plate is shut. However, according to the OP, the car acts like it turned off for a while. He didn't say it was a momentary stutter. So if the MAP was performing OK for the WOT operation in all of 1st gear....the momentary increase in vacuum should only cause a stutter....not a complete shut down.

 

Has it ever done it, if you run the gears and shift NORMAL, ie not slam shifting? Maybe some engine mount inserts so the engine can't move as much.

Also, if you clutch it after it starts bogging and rev it up, will it be normal. Just wondering, i have an issue with my ek civic, not si sometimes when i first start driving it will just start to bogg out really bad, if i clutch it and rev it, it's fine. I'm guessing a sensor too, but not sure which one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by coneheadsracing &raquo;</TD></TR><TR><TD CLASS="quote"> Just wondering, i have an issue with my ek civic, not si </TD></TR></TABLE>

you have a RHD civic that was factory equipped with a B16A/B?

 

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

you have a RHD civic that was factory equipped with a B16A/B?</TD></TR></TABLE>

no, don't thread jack my thread jack i have a LHD equipped y7... sensors are all pretty much the same, i was just asking him a general question, as i've asked my question before and have had no real help.

 

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

The MAP would sense a momentary increase in vacuum when the throttle plate is shut. However, according to the OP, the car acts like it turned off for a while. He didn't say it was a momentary stutter. So if the MAP was performing OK for the WOT operation in all of 1st gear....the momentary increase in vacuum should only cause a stutter....not a complete shut down. </TD></TR></TABLE>

I guess the scenario is up to interpretation by what the OP describes:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FearTheH &raquo;</TD></TR><TR><TD CLASS="quote">the tires will churp then the engine "skips" and bogs down really fast, probably until it shuts itself off...</TD></TR></TABLE>

I assumed he meant it started bogging and he kept his foot on the gas, hence introducing more gas after an already hearty dump of fuel. I'm not sure what the other guy was asking, but if the OP revs hard to redline in 1st, foot off the gas and shifts, then eases the clutch in without flooring it again, does the same behavior happen?

 

negative...i did not let the engine die either, if i would have let it die...my luck it wouldnt have started back up haha. it hasnt done it since that night, and ive been driving it pretty hard. and as far as mount inserts, completely irrelevant...ive got solid racing mounts. and as far as the guy stating he had to buy a whole new distributor to replace the coil???????? someone ripped you off. couple screws to take out and the coil is easily removed. Anyways, the car is running excellent right now, i really cant believe how good its running, stock b16 with CAI, 3 angle valve job and new high flow cat and its almost at 200 to the flywheel...i havent touched any sensors to try to correct this problem in hopes it would do it again and i could get a better feel for what may have caused it....im still completely clueless.. thanks for all the responses. keep any ideas comin guys!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FearTheH &raquo;</TD></TR><TR><TD CLASS="quote">negative...i did not let the engine die either, if i would have let it die...my luck it wouldnt have started back up haha. it hasnt done it since that night, and ive been driving it pretty hard. and as far as mount inserts, completely irrelevant...ive got solid racing mounts. and as far as the guy stating he had to buy a whole new distributor to replace the coil???????? someone ripped you off. couple screws to take out and the coil is easily removed. Anyways, the car is running excellent right now, i really cant believe how good its running, stock b16 with CAI, 3 angle valve job and new high flow cat and its almost at 200 to the flywheel...i havent touched any sensors to try to correct this problem in hopes it would do it again and i could get a better feel for what may have caused it....im still completely clueless.. thanks for all the responses. keep any ideas comin guys! </TD></TR></TABLE>

The coil would have cost more than the distributor. I didn't wanna buy a coil just to find out it was the ignitor either.

I got a lifetime warranty distributor for $128 shipped in 2 days. It was cheaper that way. I NEVER get ripped off.

 

That's true. Sometimes the whole assembly is cheaper than a single part, especially when the assembly is aftermarket and the part is OEM. Distributorking comes to mind

As far as the OP's issue goes, I'd still be weary beating on the car after something like that happened. It's going to be one of those phantom things that happens every once in a while when you least expect it.

 

Holy crap i'm having the same problem with my 400whp Turbo Si!!! It happens to me when I'm driving hard.

When I change gears and then press the gas it bogs down just like it wants to die. Then I just quickly release the gas pedal and press again and it's fine.

My car is tuned on Neptune with a GM 3 bar MAP sensor.

What do you think...could it be too much fuel?

 

i have no clue man, and i have nowhere near 400hp.....yet. i let off and got back on it and nothing changed, i had to kill the ignition and restart. really weird but sounds like the same problem in a nutshell(which i think is where ill end up if i dont figure this out) im planning on throwing a Jackson Racing Super Charger on soon, maybe that will amplify my problem allowing me to gauge closer to the cause....if anything breakthrough happens you can bet your @$$ ill post it just in case anyone else ever has this problem