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jamielangdo · 09-16-2008, 11:38 AM

i swaped my d16y7 for a d15b vtec. the car runs good except my engine light came on after a couple days of daily driving, why? so i heard it may be my IAC vavle, so i cleaned it, my car runs great, but engine light came on again after a couple days????
any ideas?

the first time it came on, my car would iddle up and down very quick at arround 1200rmp.
but now its not, the engine light is just on

AHHVTEC · 09-16-2008, 11:44 AM

well first you need to figure out what code your throwing

jamielangdo · 09-16-2008, 11:56 AM

its throwing a caode for IACV

AHHVTEC · 09-16-2008, 11:56 AM

then fix that and it should go away

jamielangdo · 09-16-2008, 12:00 PM

i did..even replaced the part. still comes on after a couple of days

AHHVTEC · 09-16-2008, 12:02 PM

did you reset your ecu after you put the new part on

jamielangdo · 09-16-2008, 12:04 PM

yes. then it came on again after a few days.

AHHVTEC · 09-16-2008, 12:05 PM

what ecu are you using

jamielangdo · 09-16-2008, 12:07 PM

P2p ecu

AHHVTEC · 09-16-2008, 12:09 PM

idk, if you put a new part on there and reset the ecu, it should have went away maybe check the wires between the iacv and the ecu to make sure there good and connected with no grime build up

jamielangdo · 09-16-2008, 12:12 PM

yeah. the wires for the iacv are new. i had to wire them seperate. that shouldnt be a problem there. some people have told me that placing a breather filter on my vlave cover and pluging the cold air breather tube should help because the deposits from the valve cover can cause the iacv to get dirty. is that true?

AHHVTEC · 09-16-2008, 12:14 PM

i mean it can make them dirty but thats what the screen is for i myself dont like to plug it with a filter i like running it like it came from the factory.and with you running the wires yourself just double check to make sure there getting a good connection at the ecu, it happens

jamielangdo · 09-16-2008, 12:17 PM

ok i'll check that out tonight. any other ideas of what it may possibly be?? i just find it weird that it takes a few days or so for the engine light to come on.

AHHVTEC · 09-16-2008, 12:18 PM

yeah thats all i can think of maybe check the code again to make sure its the right one

jamielangdo · 09-16-2008, 12:22 PM

alright.thanks for your help!

awptickes · 09-17-2008, 01:52 AM

Hook up an OBD2 reader, this will ensure you're pulling the correct code.

Do you have and idle problems?

jamielangdo · 09-20-2008, 11:58 AM

well sort of..its when i press the gas at arround 1700rpm my car give a little shake. it jumps the rmp up about 200rmp. just like a little kick? not sure why it does that

awptickes · 09-22-2008, 03:10 AM

Have you checked the secondary o2 sensor?

Are you using the correct ECU? No. The p2p is for the d16y8.

You need the proper ECU for the d15Bx. Get that ecu, and you'll not have a CEL.

**frankmaster** · 10-02-2008, 10:59 PM

if you have not hacked your harness go to a garage where you can find a snap-on motis and ask them to put the scope to your car.you will pay a diagnostic fee but the motis will find the problem. if your ballin buy a motis.if your broke or just too proud,keep typing

09-16-2008, 11:38 AM	#1
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	Engine light comes on after a couple days?? i swaped my d16y7 for a d15b vtec. the car runs good except my engine light came on after a couple days of daily driving, why? so i heard it may be my IAC vavle, so i cleaned it, my car runs great, but engine light came on again after a couple days???? any ideas? the first time it came on, my car would iddle up and down very quick at arround 1200rmp. but now its not, the engine light is just on

09-17-2008, 01:52 AM	#16
awptickes Von Europa Join Date: Aug 2007 Location: Bel Air, MD Age: 20 Posts: 2,044 iTrader: 5 / 100% Ride: 1999 Civic EJ9, 2003 Civic EX Coupé Rep Power: 59	Hook up an OBD2 reader, this will ensure you're pulling the correct code. Do you have and idle problems? __________________ DIY/Howto HID Projector retrofit

09-22-2008, 03:10 AM	#18
awptickes Von Europa Join Date: Aug 2007 Location: Bel Air, MD Age: 20 Posts: 2,044 iTrader: 5 / 100% Ride: 1999 Civic EJ9, 2003 Civic EX Coupé Rep Power: 59	Have you checked the secondary o2 sensor? Are you using the correct ECU? No. The p2p is for the d16y8. You need the proper ECU for the d15Bx. Get that ecu, and you'll not have a CEL. __________________ DIY/Howto HID Projector retrofit

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09-16-2008, 11:44 AM	#2
AHHVTEC HS TECH Join Date: Oct 2006 Location: Alabama Age: 29 Posts: 8,849 iTrader: 1 / 100% Ride: dc5,mk4 gti,2nd gen civic, Rep Power: 164	well first you need to figure out what code your throwing

09-16-2008, 11:56 AM	#3
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	its throwing a caode for IACV

09-16-2008, 12:00 PM	#5
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	i did..even replaced the part. still comes on after a couple of days

09-16-2008, 12:02 PM	#6
AHHVTEC HS TECH Join Date: Oct 2006 Location: Alabama Age: 29 Posts: 8,849 iTrader: 1 / 100% Ride: dc5,mk4 gti,2nd gen civic, Rep Power: 164	did you reset your ecu after you put the new part on

09-16-2008, 12:04 PM	#7
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	yes. then it came on again after a few days.

09-16-2008, 12:05 PM	#8
AHHVTEC HS TECH Join Date: Oct 2006 Location: Alabama Age: 29 Posts: 8,849 iTrader: 1 / 100% Ride: dc5,mk4 gti,2nd gen civic, Rep Power: 164	what ecu are you using

09-16-2008, 12:07 PM	#9
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	P2p ecu

09-16-2008, 12:09 PM	#10
AHHVTEC HS TECH Join Date: Oct 2006 Location: Alabama Age: 29 Posts: 8,849 iTrader: 1 / 100% Ride: dc5,mk4 gti,2nd gen civic, Rep Power: 164	idk, if you put a new part on there and reset the ecu, it should have went away maybe check the wires between the iacv and the ecu to make sure there good and connected with no grime build up

09-16-2008, 12:12 PM	#11
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	yeah. the wires for the iacv are new. i had to wire them seperate. that shouldnt be a problem there. some people have told me that placing a breather filter on my vlave cover and pluging the cold air breather tube should help because the deposits from the valve cover can cause the iacv to get dirty. is that true?

09-16-2008, 12:14 PM	#12
AHHVTEC HS TECH Join Date: Oct 2006 Location: Alabama Age: 29 Posts: 8,849 iTrader: 1 / 100% Ride: dc5,mk4 gti,2nd gen civic, Rep Power: 164	i mean it can make them dirty but thats what the screen is for i myself dont like to plug it with a filter i like running it like it came from the factory.and with you running the wires yourself just double check to make sure there getting a good connection at the ecu, it happens

09-16-2008, 12:17 PM	#13
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	ok i'll check that out tonight. any other ideas of what it may possibly be?? i just find it weird that it takes a few days or so for the engine light to come on.

09-16-2008, 12:18 PM	#14
AHHVTEC HS TECH Join Date: Oct 2006 Location: Alabama Age: 29 Posts: 8,849 iTrader: 1 / 100% Ride: dc5,mk4 gti,2nd gen civic, Rep Power: 164	yeah thats all i can think of maybe check the code again to make sure its the right one

09-16-2008, 12:22 PM	#15
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	alright.thanks for your help!

09-20-2008, 11:58 AM	#17
jamielangdo Junior Member Join Date: Aug 2008 Posts: 11 iTrader: 0 / 0% Rep Power: 0	well sort of..its when i press the gas at arround 1700rpm my car give a little shake. it jumps the rmp up about 200rmp. just like a little kick? not sure why it does that

10-02-2008, 10:59 PM	#19
frankmaster Junior Member Join Date: Sep 2008 Posts: 16 iTrader: 0 / 0% Rep Power: 0	if you have not hacked your harness go to a garage where you can find a snap-on motis and ask them to put the scope to your car.you will pay a diagnostic fee but the motis will find the problem. if your ballin buy a motis.if your broke or just too proud,keep typing

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Engine light comes on after a couple days??