JG victor x manifold/throttle body problem with rough idle
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JG victor x manifold/throttle body problem with rough idle
i figured i would post here because this manifold is most common in turbo application.
i just put this manifold on my my civic with a b18c1 with a professional product 68mm throttle body. my car idles really rough and runs rough with partial throttle. it sounds like a wrx or a muslce car with a really big cam. at wide open throttle it runs great and still pulls, all be it not like it did with the stock manifold. that is not an issue though, i expected that.
my motor is stock and i put it on because i am going to boost it and just got impatient. anyone know what it wrong with my car. no check engine lights and double checked all of my vaccum lines.
i tried to search but found little help. i found one post about maybe being a throttle body issue.
i just put this manifold on my my civic with a b18c1 with a professional product 68mm throttle body. my car idles really rough and runs rough with partial throttle. it sounds like a wrx or a muslce car with a really big cam. at wide open throttle it runs great and still pulls, all be it not like it did with the stock manifold. that is not an issue though, i expected that.
my motor is stock and i put it on because i am going to boost it and just got impatient. anyone know what it wrong with my car. no check engine lights and double checked all of my vaccum lines.
i tried to search but found little help. i found one post about maybe being a throttle body issue.
#2
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Re: JG victor x manifold/throttle body problem with rough idle (2000si)
make sure you have all the injectors connectors is on all the way
sounds like you only running on 3cylinder
sounds like you only running on 3cylinder
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Re: JG victor x manifold/throttle body problem with rough idle (9sech22civic)
i thought about the injector issue and i checked them and they are all good and tight. they clip in and the connection is sound.
i thought about the tps sensor and adjusting it. i noticed that the holes are slotted and you can move it but my check engine light never came on so i figured it was in time. i also tried to place the tps in the same position as the oem throttle body. any how, how do you set/adjust the tps. i was thinking about replacing the throttle body with the oem throttle body to see if it clears up the problem.
thanks for all of the input thus far
i thought about the tps sensor and adjusting it. i noticed that the holes are slotted and you can move it but my check engine light never came on so i figured it was in time. i also tried to place the tps in the same position as the oem throttle body. any how, how do you set/adjust the tps. i was thinking about replacing the throttle body with the oem throttle body to see if it clears up the problem.
thanks for all of the input thus far
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Re: JG victor x manifold/throttle body problem with rough idle (2000si)
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Re: (undercoverdc2)
i reset the throttle position sensor and it now reads 0.5 volts. i also reset the ecu again and still have the same problem. any one else have any insight
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Re: (2000si)
you need to make sure there are no vac leaks around the throttle body or intake manifold gasket ...the gasket may be ripped.....listen for a vac leak
take a water spray bottle and spray water around the intake manifold at idle
the car will try to die if it sucks up water from the leak....im almost sure you have a leak
Modified by D@nnY at 1:21 PM 2/15/2006
take a water spray bottle and spray water around the intake manifold at idle
the car will try to die if it sucks up water from the leak....im almost sure you have a leak
Modified by D@nnY at 1:21 PM 2/15/2006
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Re: (D@nnY)
i tried the water bottle diagnosis of the leak and found no leak. i can't hear of any vacuum leaks either. i just double checked to see if all of the bolts were tight, and they are. i thought maybe i plugged one of the sensors in wrong but no, they are also correct.
the only other solution i have is to put the old manifold and throttle body back on, as much as i hate it, i have to drive something.
the car is running really rich and it is blowing black smoke, it is almost like it is not getting enough air. i don't know how that is possible other than reduction in air velocity due to it's huge size. maybe i have to either boost it or build a higher compression motor to make this manifold operate correctly.
the only other solution i have is to put the old manifold and throttle body back on, as much as i hate it, i have to drive something.
the car is running really rich and it is blowing black smoke, it is almost like it is not getting enough air. i don't know how that is possible other than reduction in air velocity due to it's huge size. maybe i have to either boost it or build a higher compression motor to make this manifold operate correctly.
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Re: (2000si)
Sure sounds like the MAP sensor is getting an incorrect reading. Do you have the MAP sensor mounted to the throttle body? If so, check to make sure that the o-ring is in between them and that the throttle body gasket is on properly.
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Re: JG victor x manifold/throttle body problem with rough idle (boostedcivicsir)
when i started trouble shooting, i checked for vacuum leaks where the manifold butts up to the head and i checked where the throttle body and manifold make contact. i took the throttle body off and replaced it with the stock unit and the gasket was seated tight. there were no leaks in either of the two gaskets and all of the lines were connected and tight. i made it a point on my checklist when i re-installed everything to make sure that o-ring on the map sensor was on and i rechecked just to make sure.
i had the same problem with the stock throttle body and the edelbrock manifold.
the only thing left i can think of is somehow the manifold has a hairline crack that i can't see and it is making it run shitty.
tomorrow the manifold comes off and all of the stock stuff goes back on. i didn't think putting this manifold on was going to cause all of this. the only thing i thought it would do is make me loose some power down low. still though, this manifold should still allow my car to idle properly. i am all out of ideas.
appreciate the help though guys
Modified by 2000si at 8:28 PM 2/15/2006
i had the same problem with the stock throttle body and the edelbrock manifold.
the only thing left i can think of is somehow the manifold has a hairline crack that i can't see and it is making it run shitty.
tomorrow the manifold comes off and all of the stock stuff goes back on. i didn't think putting this manifold on was going to cause all of this. the only thing i thought it would do is make me loose some power down low. still though, this manifold should still allow my car to idle properly. i am all out of ideas.
appreciate the help though guys
Modified by 2000si at 8:28 PM 2/15/2006
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Re: JG victor x manifold/throttle body problem with rough idle (2000si)
some of the sesnors have the same plugs you may have plugged them in backwards...post detailed pictures if you want help
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Re: JG victor x manifold/throttle body problem with rough idle (D@nnY)
i will do that tomorrow before i start taking it apart. i am pretty sure i plugged everything correctly based on the color wires people are telling me to check on each sensor. i also have another 1997 civic with a gsr motor and a skunk2 manifold with an edelbrock throttle body and i double checked all of the wire connectors with each associated sensor and the two cars match up.
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Re: JG victor x manifold/throttle body problem with rough idle (2000si)
first and foremost, thanks for all of the help, but i put my stock manifold back on and it works just as good as it did before. i know i didn't cross any of the sensor plugs and i also know that i connected all of the vacuum lines correctly. the throttle body was good, the manifold had to have leaks in it. i can't find any cracks but that is the only thing i can come up with. i tightened the bolts down the same on the stock unit just like i did the edelbrock so i know i torqued it correctly.
on a side note, anybody need a edelbrock manifold???? i just so happen to have one for sale.
on a side note, anybody need a edelbrock manifold???? i just so happen to have one for sale.
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Re: JG victor x manifold/throttle body problem with rough idle (2000si)
a/f most likely changed and thats hy your getting a rough idle. got a wideband? what are you using to tune?
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Re: JG victor x manifold/throttle body problem with rough idle (vaporboy12)
i was just starting to put parts on and this was the first part. i am going to boost it so that is why i got the manifold. i just put it on to make sure that if i did have any problems, i could pinpoint where it was at instead of putting a bunch of parts on and going apeshit to find a problem if i encountered any. i don't have a wideband and nothing to tune with. i figured i didn't have to tune because i don't have any engine modifications to warrant changing anything. i figured the vehicle would still run/idle even with a bigger manifold and throttle body.
i think i will try the install again after i get everything else on the car. this manifold will be my last mod after i get the proper gauges and tuning apparatus hooked up.
i think i will try the install again after i get everything else on the car. this manifold will be my last mod after i get the proper gauges and tuning apparatus hooked up.
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Re: JG victor x manifold/throttle body problem with rough idle (2000si)
I Had that very same Problem Before w/a STR TB (68mm FYI)...
The Dam Thing would Act up from Cold start to Idle, Driving...Switched back to the GSR TB and everything was Fine again..
Tossed that Brand New (less than 3miles) STR TB in the Trash!
Now just Running a OE P72 TB and Happy w/it..
The Dam Thing would Act up from Cold start to Idle, Driving...Switched back to the GSR TB and everything was Fine again..
Tossed that Brand New (less than 3miles) STR TB in the Trash!
Now just Running a OE P72 TB and Happy w/it..
#22
Re: JG victor x manifold/throttle body problem with rough idle
where would i place my 3 bar map sensor on my manifold? its because i topped off all my vacuums and now Im clueless on where i would place it.
#23
Re: JG victor x manifold/throttle body problem with rough idle
Cant believe no one has though of this but I will toss it out there. You replaced the stock GSR mani and TB with Victor X and 68MM TB. The Victor X is way big for a stock GSR so you lost a bunch of low end and is best used for high boost and crazy all motor setups. What OBD and ECU are you running? Is this a GSR swap or a stock GSR Teg? What I am getting at is the GSR mani has dual runner and the ECU is tuned for them. If you just swapped mani's then the ECU no longer sees the GSR mani and cant control the daul runners, there is a related sensore on the mani for the ECU. May guess is that the ECU is not longer seeing the stock mani and the tune is not right for the set up.
Also from what I have read here I would look at the injectors as well since you described a classic dead miss is a cylinder.
Also from what I have read here I would look at the injectors as well since you described a classic dead miss is a cylinder.
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