Hondaswap.com

hondacivicguy05 · 06-17-2008, 08:25 PM

ok heres my problem i finally got all my swap done. but i got a problem with it now. when i put it in gear and start to let off the clutch and push the accelerator it starts to skip and studdard and it almost stalls out. and i got to looking i have an extra plug left. i think it goes to a vaccum valve that was on back of the dx throttle body. am i missing that valve for the si intake. and is that what could be causing my problem. i gladly appreciate all the help you can give me thanks.

efhondakid · 06-18-2008, 02:43 AM

There will be two or three plugs (depending on the year) left over after the swap. Did you switch the wires at the TPS? CEL?

hondacivicguy05 · 06-18-2008, 06:33 AM

yeah i swapped the two outside wires around and i double checked my other plugs i had to make longer and they are right and my car is a 91 civic if that helps any

efhondakid · 06-18-2008, 06:45 AM

Is it throwing any codes?

hondacivicguy05 · 06-18-2008, 07:26 PM

none i have sat there and watched it for like 5 or 10 mins while it was running and its not giving anything i even checked my vaccum lines to make sure they are right but all i can figure out is i'm missing a vaccum valve off the back of the intake that i have seen on another si intake like the one i used but i'm not for sure if that is the problem or not

efhondakid · 06-18-2008, 08:21 PM

Take a pic of said missing part.

hondacivicguy05 · 06-18-2008, 08:39 PM

ok i will but it might be a day or so before i can get it up on here and i will also take a pic of the intake i got on there also

jlicrx · 06-18-2008, 10:14 PM

you should have one extra connector left over on the DPFI harness - white 2-wire connector with orange and black/yellow wires - that connector went to the Tandem Control Valve on the back of the throttle body - the MPFI doesn't use a Tandem Control Valve - the 89-91 Si intake manifold has a Fast Idle Control Valve on the back side (picture below) - the 88 Si did not have the Fast Idle Control Valve - the DPFI car does not have any wiring in the chassis or engine harnesses for the FICV - the FICV only works when the ambient air temperature is below -10C (14F) and just bumps the idle up slightly - the car will run just fine without the FICV

hondacivicguy05 · 06-19-2008, 06:39 AM

ok so i can tape that wire up and tuck it in the wire harness out of the way so thats got that solved but i still got the other problem of it cutting out when i start to take off and it starting to run like crap when its sittin there at idle and thanx for the help so far

hondacivicguy05 · 06-19-2008, 07:32 PM

pics of the intake i used

hondacivicguy05 · 06-25-2008, 04:56 PM

i think i finally figured out what is wrong with my car i think its between my throttle body and my injectors are working right so i'm goin to change them out and see what that does

mikey bottles · 06-26-2008, 08:31 PM

a good friend of mine just recentely told me he had, what sounds like, the same problem when he did his swap before, his problem ended up being that he had to run the crank angle sensor wires, and the fuel injector wires through different holes in the firewall otherwise they were interfering with each other. He said after he ran them seperately he never had any problems with it.. hope that helps.

hondacivicguy05 · 06-27-2008, 06:27 AM

ok i will try that and see if that helps thanks for the help

hondacivicguy05 · 06-30-2008, 09:01 PM

i tried it and it didn't make any difference in it still does it so i guess i'm goin to go ahead and swap out the throttle body and the injectors then again it might be one of my injectors are messed up so i'm goin to go ahead and dothat since i have a guy goin to give me the parts

hondacivicguy05 · 07-25-2008, 11:25 PM

i change the injectors and it still does it can it be possible that i'm not gettin enough fuel and that would make it run like crap when i try to go down the road

Fernpatch · 07-30-2008, 11:48 AM

I had a problem like that with my swapped crx when I first started it. In my case I had the wrong plug on the EACV. Thankfully my computer set a trouble code that steered me in that direction. Check the wires going to the EACV. Depending on your harness there are 3 or 4 plugs that will clip into the thing and only one will work right. You need a white plug with a black/yellow and a orange(or brownish) wire. hope this helps.

prpprimo · 08-09-2008, 12:20 AM

Im thinking intake leak. Did you use a new(OEM ) intake gasket when you installed the intake ? Your describing a stumble during acceleration. Here is a cheap an easy test. Grab a can of carb cleaner or starting fluid. While the engine is running, spray directly where the intake mounts to the head. If your RPMs increase you have a leak, and if no change I would check your fuel pressure regulator, sounds like your running lean, which an intake leak would cause. Air/fuel mixture.

Another possibility is a faulty o2 sensor. ..its process of elimination at this point. Be sure to post your results.

hondacivicguy05 · 08-14-2008, 06:10 PM

thanks for the help i'm goin to go try it as soon as i can i hope that something works so i will let yall know if it works or not and i did use a new intake gasket when i installed it

hondacivicguy05 · 08-15-2008, 02:22 PM

ok heres an up date i checked to intake to see if it had a leak and its ok and as far as the white plug i had the wrong one on there and i change it cause i had the wrong one on there and it keeps giving me the code for that but if i wire it back like i had it and reset the ecu it don't give me that code so i guess i'm goin to change the regulator and try that

hondacivicguy05 · 08-16-2008, 05:26 PM

ok another update i change the plugs in it and put some for the si in it and it made it run alil better but still has alil skip in it so i'm goin to change the plug wires and try it and see if it clears the problem out

hondacivicguy05 · 09-01-2008, 04:40 PM

ok its finally running right and and everything is running good took it for a test ride and it went real good everything is working right so all i got to do is tidy up my wiring alil bit and it is set to go excpet for the battery which dead as hell but everything is good now so thanx everybody for helping my out on my swap now later down the road is the si cam swap i'm thinking about doin

06-17-2008, 08:25 PM	#1
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	i need help on my dx to si swap ok heres my problem i finally got all my swap done. but i got a problem with it now. when i put it in gear and start to let off the clutch and push the accelerator it starts to skip and studdard and it almost stalls out. and i got to looking i have an extra plug left. i think it goes to a vaccum valve that was on back of the dx throttle body. am i missing that valve for the si intake. and is that what could be causing my problem. i gladly appreciate all the help you can give me thanks.

06-18-2008, 02:43 AM	#2
efhondakid My name is Byron. Join Date: Mar 2007 Location: Akron-Canton, Ohio Age: 19 Posts: 2,519 iTrader: 0 / 0% Ride: `89 DX Hatch w/JDM B16 Rep Power: 64	There will be two or three plugs (depending on the year) left over after the swap. Did you switch the wires at the TPS? CEL? __________________ Dont PM me with tech questions. I will not answer them. H22 head for sale. http://hondaswap.com/parts-sale-trad...5/#post1073448 Wanted CRX parts. http://hondaswap.com/parts-sale-trad...6/#post1073450

06-18-2008, 06:45 AM	#4
efhondakid My name is Byron. Join Date: Mar 2007 Location: Akron-Canton, Ohio Age: 19 Posts: 2,519 iTrader: 0 / 0% Ride: `89 DX Hatch w/JDM B16 Rep Power: 64	Is it throwing any codes? __________________ Dont PM me with tech questions. I will not answer them. H22 head for sale. http://hondaswap.com/parts-sale-trad...5/#post1073448 Wanted CRX parts. http://hondaswap.com/parts-sale-trad...6/#post1073450

06-18-2008, 08:21 PM	#6
efhondakid My name is Byron. Join Date: Mar 2007 Location: Akron-Canton, Ohio Age: 19 Posts: 2,519 iTrader: 0 / 0% Ride: `89 DX Hatch w/JDM B16 Rep Power: 64	Take a pic of said missing part. __________________ Dont PM me with tech questions. I will not answer them. H22 head for sale. http://hondaswap.com/parts-sale-trad...5/#post1073448 Wanted CRX parts. http://hondaswap.com/parts-sale-trad...6/#post1073450

06-18-2008, 10:14 PM	#8
jlicrx Senior Member Join Date: Jun 2003 Location: Colorado Springs Posts: 1,208 iTrader: 0 / 0% Rep Power: 30	you should have one extra connector left over on the DPFI harness - white 2-wire connector with orange and black/yellow wires - that connector went to the Tandem Control Valve on the back of the throttle body - the MPFI doesn't use a Tandem Control Valve - the 89-91 Si intake manifold has a Fast Idle Control Valve on the back side (picture below) - the 88 Si did not have the Fast Idle Control Valve - the DPFI car does not have any wiring in the chassis or engine harnesses for the FICV - the FICV only works when the ambient air temperature is below -10C (14F) and just bumps the idle up slightly - the car will run just fine without the FICV Attached Thumbnails __________________ ZCspeed Racing

06-18-2008, 06:33 AM	#3
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	yeah i swapped the two outside wires around and i double checked my other plugs i had to make longer and they are right and my car is a 91 civic if that helps any

06-18-2008, 07:26 PM	#5
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	none i have sat there and watched it for like 5 or 10 mins while it was running and its not giving anything i even checked my vaccum lines to make sure they are right but all i can figure out is i'm missing a vaccum valve off the back of the intake that i have seen on another si intake like the one i used but i'm not for sure if that is the problem or not

06-18-2008, 08:39 PM	#7
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	ok i will but it might be a day or so before i can get it up on here and i will also take a pic of the intake i got on there also

06-19-2008, 06:39 AM	#9
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	ok so i can tape that wire up and tuck it in the wire harness out of the way so thats got that solved but i still got the other problem of it cutting out when i start to take off and it starting to run like crap when its sittin there at idle and thanx for the help so far

06-19-2008, 07:32 PM	#10
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	pics of the intake i used Attached Thumbnails

06-25-2008, 04:56 PM	#11
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	i think i finally figured out what is wrong with my car i think its between my throttle body and my injectors are working right so i'm goin to change them out and see what that does

06-26-2008, 08:31 PM	#12
mikey bottles Prof. Bottles Join Date: Nov 2006 Location: Dirty Jer-Z Age: 23 Posts: 189 iTrader: 0 / 0% Ride: Swapped 88' Rex Rep Power: 10	a good friend of mine just recentely told me he had, what sounds like, the same problem when he did his swap before, his problem ended up being that he had to run the crank angle sensor wires, and the fuel injector wires through different holes in the firewall otherwise they were interfering with each other. He said after he ran them seperately he never had any problems with it.. hope that helps. __________________ *"LAYIN' IT DOWN ON THE STOMPIN' GROUND SINCE 1985" NJ856!*

06-27-2008, 06:27 AM	#13
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	ok i will try that and see if that helps thanks for the help

06-30-2008, 09:01 PM	#14
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	i tried it and it didn't make any difference in it still does it so i guess i'm goin to go ahead and swap out the throttle body and the injectors then again it might be one of my injectors are messed up so i'm goin to go ahead and dothat since i have a guy goin to give me the parts

07-25-2008, 11:25 PM	#15
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	i change the injectors and it still does it can it be possible that i'm not gettin enough fuel and that would make it run like crap when i try to go down the road

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07-30-2008, 11:48 AM	#16
Fernpatch Junior Member Join Date: Jul 2008 Location: Bellingham,WA Age: 23 Posts: 5 iTrader: 0 / 0% Ride: 90 crx Rep Power: 0	I had a problem like that with my swapped crx when I first started it. In my case I had the wrong plug on the EACV. Thankfully my computer set a trouble code that steered me in that direction. Check the wires going to the EACV. Depending on your harness there are 3 or 4 plugs that will clip into the thing and only one will work right. You need a white plug with a black/yellow and a orange(or brownish) wire. hope this helps.

08-09-2008, 12:20 AM	#17
prpprimo Hondaholic Join Date: Jun 2008 Location: Albuquerque Posts: 88 iTrader: 0 / 0% Ride: hondas/toyotas/vintage VW Rep Power: 1	Im thinking intake leak. Did you use a new(OEM ) intake gasket when you installed the intake ? Your describing a stumble during acceleration. Here is a cheap an easy test. Grab a can of carb cleaner or starting fluid. While the engine is running, spray directly where the intake mounts to the head. If your RPMs increase you have a leak, and if no change I would check your fuel pressure regulator, sounds like your running lean, which an intake leak would cause. Air/fuel mixture. Another possibility is a faulty o2 sensor. ..its process of elimination at this point. Be sure to post your results.

08-14-2008, 06:10 PM	#18
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	thanks for the help i'm goin to go try it as soon as i can i hope that something works so i will let yall know if it works or not and i did use a new intake gasket when i installed it

08-15-2008, 02:22 PM	#19
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	ok heres an up date i checked to intake to see if it had a leak and its ok and as far as the white plug i had the wrong one on there and i change it cause i had the wrong one on there and it keeps giving me the code for that but if i wire it back like i had it and reset the ecu it don't give me that code so i guess i'm goin to change the regulator and try that

08-16-2008, 05:26 PM	#20
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	ok another update i change the plugs in it and put some for the si in it and it made it run alil better but still has alil skip in it so i'm goin to change the plug wires and try it and see if it clears the problem out

09-01-2008, 04:40 PM	#21
hondacivicguy05 Member Join Date: Jun 2008 Location: Rome ga Posts: 50 iTrader: 0 / 0% Ride: 91 civic hb dx - 84 s10 with a 350 in it Rep Power: 1	ok its finally running right and and everything is running good took it for a test ride and it went real good everything is working right so all i got to do is tidy up my wiring alil bit and it is set to go excpet for the battery which dead as hell but everything is good now so thanx everybody for helping my out on my swap now later down the road is the si cam swap i'm thinking about doin

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i need help on my dx to si swap