Ok, check this out, this past weekend I threw a new motor, tranny and a blower. Thing only has 22K on it. Its a same year swap, I think, it might be a year newer. The car ran like a champ for about 3 hours. Then the ICM died, no biggie, I replaced it with one off my old motor. So its runnin awesome for like the next two days. I get the bright idea to take my exhaust off, headache central. But the car runs like a champ. So I drive it around for the day, no problems. I take a two hour drive back to CT from my rent's place in NY. About half way home it starts giving me problems.

the check engine light comes on and it is boggin. OK, so it idles fine, if you don't get it above idle speed in each gear, it runs fine. Once you get to goin about 35-40mph, it bogs and doesn't wanna recover, just sits there boggin. my lil A/F guage drops below the red (yes its a narrow band and yes go fawk urself for your comment on that! ) So, I give it more gas, and as long as I am in boost, the car runs. I got it home and go to autozone.

P0122
TPS/Pedal position
Sensor A
Circuit Low input

P0301
Cylinder 1
Misfire detected

P0452
EVAP emission
Control System
Pres Sensor Low


OK, so I changed out the plugs, which just happen to be 3 days old. And I change the TPS out with a new one. Its still doin it! I didn't even know the EVAP emission control system existed! But I hear that its just the gas filler cap thing? Did the 2000 cavaliers come with that? The only thing I didn't do is clear the codes, tho I don't think that it would have anything to do with that. IDK whats the issue with this thing! Can someone help me?

Scott


When I boost, you boost, we boost

if your gas cap is missing or not tight, that code will throw. It will also throw if there is a leak somewhere in the evap system. The TPS is what caused it to bog like that. It wasn't the missfire. A multiple missfire and a blinking CEL is what you need to worry about in that case. This time is just dumped fuel beause it didn't know where the throttle was most likely, which caused the missfire.
Test what your TPS is actually reading. I've had the same problem before and I fixed it by wiggling the wires around.



Cardomain|Myspace

I had issues with my TPS before boost and I don't remember it really giving me this much of an issue. Tho I did disconnect the MAP sensor to get around it, so maybe thats why I don't remember it much. Well, i guess I will try to wiggle some wires but I really don't think that is gonna help. I can't see how there would be a leak in the EVAP system, thats just the breather line that comes from the gas cap, right? I didn't touch any of that when i did the swap. How am I supposed to test the TPS and what its really reading anyway?

I am not really worried about the misfire cause I think thats just from goin from a bog to boost. Once you are in WOT, doesn't a different system take over? Different sensors or something? I thought I read that somewhere.

Scott


When I boost, you boost, we boost

Will someone please help this man out....



z24 aint afraid of no ecotec

Hahahaha! Yeah! I am running out of ideas. I noticed this morning that it didn't start doing it until it warmed up, like to the first big notch on the thermo guage, which I think is kinda wierd. What do you guys think?

Scott


When I boost, you boost, we boost

did you just install the s/c or did you replace everything ?

I replaced everything, kinda makes it a lil hard to diagnose, I know. But it was running just fine after I replaced the IDI cover (ICM) died. I took the exhaust off and it ran fine, but then about an hour into a trip it just decided to start boggin when not in boost.

Scott


When I boost, you boost, we boost

HELP HIM OUT GUYS>>>>> don't let him down...
I read this entire thing.... NOTHING is coming to my head .........

when it bogs does it run rich............ (black smoke)
did you when you installed the new motor ....add headers or anything like that.... when I relocated my primary o2 sensor (on to my turbo's downpipe.... I had the EXACT same symtoms........ bog bog bog.... black smoke... I shut it off turn it back on and it was fine....... I'm running out of Ideas fast on this one...

That doesn't normally happen.....

I reset the PCM like 15 times (I left the battery Disconnected everynight).... and now and then I get a CEL for a little while then it goes off........
No biggy now...... are you running a GM reflash.... a guy on here NOT too long ago was runnin a S/C and he DIDN"T have the reflash... it was runnin fine... he got the reflash from GM and they had the same problems your having.... start up....idle fine . start driving.. then.....BOG BOG BOG.... die.......

hmmmmm

ANYONE ?????

Lee

I'm stumped...... Sorry dude....


JDM Civic Hatch
Status: Parting Out Turbo Kit....
14.224 @ 102.01MPH @ 5.5psi.... 2.3 60'
Next: Civic JDM B16a2 w/GSR LSD Turbo - Goal 300whp 1400lbs...

yeah, unfortunately, I didn't add anything, not yet, the only thing I did was remove everything after the cat. As far as I can tell, it instantly leans out. Cause my lil narrowband A/F ratio guage drops down to the red and almost fades totally out. I look at the boost guage and its in vacuum, once I press the gas down, i can watch the guage go up to boost, even when its boggin, until it hits 0, thats when it picks up again. WTF!?!?!

Does anyone know what system, or sensors are in control when NOT in WOT?

Scott


When I boost, you boost, we boost

reflashed ????


JDM Civic Hatch
Status: Parting Out Turbo Kit....
14.224 @ 102.01MPH @ 5.5psi.... 2.3 60'
Next: Civic JDM B16a2 w/GSR LSD Turbo - Goal 300whp 1400lbs...

yeah, its reflashed, god I hope so, it came out of a GM show car. You know what, I think that whole thing of, it warms up and then it starts to bog was a fluke, but it definately doesn't do it all the time. Maybe there is some issue with my electrical system? Tho it does seem inconsistant until it hits about 20 MPH and then it does it religously. I am thinkin about just takin it to a dealership and havin them go over it. They are probably gonna bitch hardcore about the lack of exhaust and blame life on me. whatever!

Scott


When I boost, you boost, we boost

But you said you put your old ECM in, which means it probably isn't reflashed. I'll bet you're running lean alot and gonna blow the motor. And one other thing to check would be your o2 sensor. possibly could cause the problems you're describing.

check the map sensor , and see if its the same part # as your stock 1

the proto type i got still had the stock 1 bar map


also put your exhaust back on and see if that changes anything , since that is the 1 thing you changed before it went belly up


also make sure you didnt put crappy gas in it

I noticed tonight that in each gear it would bog at a different speed. So like, 1st gear bogs at 15. 2nd gear bogs at 25, 3rd gear bogs at 32, 4th at 40 and 5th at 44. It does each MPH religously. These are round about where each gear bogs. Now get this, when it bogs, if you shift, up, it comes back. If you downshift, as long as you don't put your foot on the gas, it will run fine. Now, when it bogs out, and you leave it in that gear, it has to drop 5 miles to kick back in, just like the VSS does....... wait a second! I will be right back!



HOLY SHYT! OK, so I just got back, went for a ride, it started to bog so I hit the VSS switch, the speedo dies, and the motor comes back to life! I turn the VSS back on and the speedo comes back and the motor dies! IDK if that means the VSS is dying, I have never heard of that happening before with a VSS, where it makes a speed govenor for each gear when it dies. My question now is, is this the answer or am I just overriding the real problem?

Scott


When I boost, you boost, we boost

If your running that lean you shouldnt be driving the car. unless you want to blow the motor.


A few questions...

Why did you replace the motor and tranny?
Was the ecu out of an auto?
have you changed your fuel filter latly?


you need to clear the codes and see what comes back. The evap code could be your gas cap being loose, leaking or off.

Have you had your alt tested? its posible that its going bad and your getting low voltage at the tps because of it.

Also you say it bogs at those speeds each time. What rpm is it bogging at when you hit those speeds?

mph doesnt matter , RPM does

is the car even spitting up a code ??

realated to the vss i mean


did you change the tps or the engine harness when you swaped motors

ok, the motor and tranny were replaced, the ECU was out of the same car with the reflash.

97cavie24ls
Dude! Its the nuttiest thing! The car doesn't give a rats @ss about the RPM level! Only speed! I swear, each gear has its own govenor! The RPMs are all different for each speed that it stops at, well, I think so anyway.... MAN! Now you got my thinkin if I was really payin that much attention to it! damnit! And I am at work right now...

Yeah, and its botherin me that it didn't throw a code for the VSS. Which totally makes me think that its not the issue, just a way to bypass the real issue. After work I am gonna go to autozone and have them run the codes again, if they haven't changed, then I am gonna have them clear em and see what comes back.

Scott


When I boost, you boost, we boost

I changed the TPS after it gave me that code and it didn't do anything. The wiring harness is from the donor car that I got the motor, tranny and SC.

Scott


When I boost, you boost, we boost

alright, it happens all around 2G-2.5G on the tach, what the hell does this all mean? Anyone have a clue?

Scott


When I boost, you boost, we boost

OK, so I have been killin myself tryin to figure this thing out. So I said enuf is enuf and I had a friend drive me two hours back to my parents house (where I did the swap) and pick up a butt load of spare parts. Picked up my ECU, wiring harness, alternator, starter, and exhaust.

I started off by finding some frayed wire loom near the belt, but no wires were actually hurt. I then put the exhaust back on. I also regrounded the motor and the battery (my battery being in the trunk). Took it out for a ride and nothing, still did it, but did it quieter (exhaust back on).

Came home put in my old NON-reflashed ECU. Babied it the whole time I drove it and it didn't bog at all! It was awesome! I didn't get on it, though I thought that would be the best idea. The cool thing is that I didn't have to for the bog to happen. So, much like my ICM, my ECU took a sh!t too. So, I am going to call tomorrow about getting my ECU reflashed and hopefully I can start wylin out!

Scott


When I boost, you boost, we boost

have you checked the map sensor ??


to see if it is the stock 1 bar map , or the s/c 2 bar map

yea i agree with 97cavie24ls(JDM&00s/c sedans™), sounds like a map issue to me also... check that sensor.. make sure its the 2 bar and not the 1 bar sensor

to check the tps get a wiring diagram of the sensor. find the signal wire and check the voltage that it gives out. should be 0v when closed and about 5v when open. do to the voltage chaning so quickly you will not find any drop outs in the signal voltage you would have to have a osiliscope to detect these drop outs. to check the map sensor your will need a digital multimeter and a vacuum pump. again get a wiring diagram for the map sensor and find the signal wire. check the voltage on the signal wire as you pull vacuum on the vacuum port of the sensor (the little nipple) with the vacuum pump. once agian the voltage should vary from 0v-5v. these test are not very hard, so have fun and good luck!

by the way if it is a wiring problem changing a sensor will not do anything. so check your tps sensor wiring.