Hondaswap.com | Honda Technical & JDM styling Forums

crxnonvtec · 09-24-2009, 03:50 PM

its a 91 crx dx with a d16a6 swap, jackson racing supercharger, str cam gear, exhaust....I changed the iacv 3 difftimes all the same result, coolant temp sensor is good, swapped map two times same result, iat tested good, new distributor from cap to shaft, new main relay, new o2....vacuum tested good so did the fuel pressure...it runs great just stays at 2500 it dropped once when I drove it a lil and never did again. and no the throttle cable isnt stuck. also I had swapped the whole intake assembly back to the stock intake with all the components and still at 2500rpm. anyone got suggestions?? NO CODES!!!!

INJEN78 · 09-24-2009, 03:56 PM

fitv??? maybe redo the timing?

crxnonvtec · 09-24-2009, 05:45 PM

timing is dead on and I dont have an fitv...I have something like it on the back of the manifold but I swapped that out too and did nothing

INJEN78 · 09-24-2009, 06:57 PM

hmmm are all the intake bolts tight?

89hatchd15b · 09-24-2009, 07:09 PM

sounds like a vacuum leak. check all the hoses and intake manifold gasket and such.

crxnonvtec · 09-24-2009, 08:12 PM

if it was a vacuum leak then y did the vacuum test good on the gauge? all the hoses are new and routed properly

89hatchd15b · 09-24-2009, 08:36 PM

I had the same problem on my jdm d15b vtec and it was a leak at the intake manifold gasket. Does that engine have an idle control diaphragm next to the throttle?

crxnonvtec · 09-26-2009, 10:16 AM

yes it has the diaphram but its sucking back and not touching the throttle the throttle blade is completely closed ...and all the vacuum lines are new and ran properly theyve been gone over multiple times...and the intake gasket is new and tightened properly

89hatchd15b · 09-26-2009, 11:39 AM

I don't know, I have only seen vacuum or timing issues causing a high idle. I will have to think about this one and get back to you.

crxnonvtec · 09-26-2009, 02:29 PM

dont feel bad it seems no one can help me with this problem

crxnonvtec · 09-28-2009, 08:44 PM

yes.... ive gone through so much

Fernpatch · 10-01-2009, 12:52 PM

This may sounds stupid but have you played with the idle air screw on the throttle body at all? that may be out of adjustment. Also have you made double sure that there are no air pockets in the cooling system? The IACVs that you have been using were they new or used? did you try and take any of them apart and see if they came unscrewed inside?

78civic · 10-01-2009, 06:24 PM

Loose nut behind the wheel? Just kidding.
Try pulling the neg off the battery to see if something needs to be cleared electronically..?
I'd first think it's vacume related. Try some carb cleaner squirted around the charger/intake. If it boggs, you know it's in that area.
Lastly, call Jackson and ax them if this is a regular occurance?

Keep us posted.
E

crxnonvtec · 10-01-2009, 09:45 PM

it did the same thing with the stock intake on also...and this has been on going for months now the battery is disconnected for days at a time sometimes.

crxnonvtec · 10-01-2009, 09:48 PM

i would doubt three iacv's ...two off running cars would malfunction the same...and ive had the car up to temp with fan running and bled the coolant system no air was in it....still stumped and going nuts

INJEN78 · 10-01-2009, 09:59 PM

hmm...thats wierd..who did the harness?

LS_VTEC · 10-01-2009, 11:01 PM

What ECU are you using?

LS_VTEC · 10-01-2009, 11:06 PM

does your engine have a fast idle control solenoid valve? The 91 crx with the 1.6L engine has one....

crxnonvtec · 10-01-2009, 11:19 PM

i have 3 ecus 1 chipped from jet and 2 stock it does the same with all. no fitv it has something similar but u cant tighten anything on it like the obd1 models that was obviously one of the first things to pop up when i searched idle problems

INJEN78 · 10-02-2009, 12:16 AM

yea the d16a6 mani doesnt have that plate..

riceracerex · 10-02-2009, 12:45 PM

when my chip was not connected all the way on my pm6 ecu it caused it to idle @ 2500 but I was not able to rev past 3500 and it ran horrible. So it does not sound like there is a problem there.

have you tried a compression test? IAC Valve or TPS Sensor?
My D16z6 in My 93' Civic had this problem but after it warmed up sometimes it would stop the erratic idle, so just putting those out there.

INJEN78 · 10-02-2009, 12:57 PM

lol read the thread man..he already tried all that..

crxnonvtec · 10-04-2009, 10:48 PM

im going nuts ...i just keep staring at the engine in the garage waiting for it to say TADAAAAAA Im fixed

its my last option hahahaha

B16RacerN2NR · 10-05-2009, 01:08 AM

Quote:

Originally Posted by crxnonvtec

if it was a vacuum leak then y did the vacuum test good on the gauge? all the hoses are new and routed properly

Well of course the vacuum test read good. You're not 'losing' vacuum and your engine is running fine. Spray some throttle body cleaner around all points of the intake manifold gasket. If you the idle changes, you know where your problem is.

It's not idling high for no reason so don't just quit and think you've covered all angles...

crxnonvtec · 10-07-2009, 12:12 PM

im not quitting but after almost two years and being on every forum and reading through the shop manual u cant blame me for losing some hope hahahaha...and I sprayed starting fluid around the intake and no rpm change....I just dont know what would make the idle shoot up to 2500 and stay there...it runs good just idles high...no sputtering or hesitation ... sometime it sucks air through the hole in the tb and sometimes it doesnt idk ive just been over the engine so many times...and its always harder to describe something on the internet

09-24-2009, 03:50 PM	#1
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	91 crx d16a6 Idle at 2500 rpm its a 91 crx dx with a d16a6 swap, jackson racing supercharger, str cam gear, exhaust....I changed the iacv 3 difftimes all the same result, coolant temp sensor is good, swapped map two times same result, iat tested good, new distributor from cap to shaft, new main relay, new o2....vacuum tested good so did the fuel pressure...it runs great just stays at 2500 it dropped once when I drove it a lil and never did again. and no the throttle cable isnt stuck. also I had swapped the whole intake assembly back to the stock intake with all the components and still at 2500rpm. anyone got suggestions?? NO CODES!!!!

09-24-2009, 03:56 PM	#2
INJEN78 ¿GANGSTA GREMLIN? Join Date: Oct 2007 Location: CT(860) VT(802) Age: 21 Posts: 7,749 iTrader: 5 / 100% Ride: 91 CRX si Rep Power: 214	fitv??? maybe redo the timing? __________________ R.I.P BEN LEE2/24/08 we love and miss you http://burnoutbox.activeboard.com/in...BID=127652&p=1 GOOD FAST CHEAP, you can pick only two. fast and cheap isn't good good and cheap isn't fast good and fast isn't cheap

09-24-2009, 06:57 PM	#4
INJEN78 ¿GANGSTA GREMLIN? Join Date: Oct 2007 Location: CT(860) VT(802) Age: 21 Posts: 7,749 iTrader: 5 / 100% Ride: 91 CRX si Rep Power: 214	hmmm are all the intake bolts tight? __________________ R.I.P BEN LEE2/24/08 we love and miss you http://burnoutbox.activeboard.com/in...BID=127652&p=1 GOOD FAST CHEAP, you can pick only two. fast and cheap isn't good good and cheap isn't fast good and fast isn't cheap

10-01-2009, 12:52 PM	#12
Fernpatch Senior Member Join Date: Jul 2008 Location: Bellingham,WA Age: 24 Posts: 149 iTrader: 0 / 0% Ride: 90 crx w/zc dohc Rep Power: 8	This may sounds stupid but have you played with the idle air screw on the throttle body at all? that may be out of adjustment. Also have you made double sure that there are no air pockets in the cooling system? The IACVs that you have been using were they new or used? did you try and take any of them apart and see if they came unscrewed inside? __________________ What I write is my own opinion based on what I have done. Your own results may vary... "Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall, torque is how far you take the wall with you." --Anonymous

10-01-2009, 06:24 PM	#13
78civic Junior Member Join Date: Oct 2004 Age: 46 Posts: 291 iTrader: 0 / 0% Rep Power: 14	Loose nut behind the wheel? Just kidding. Try pulling the neg off the battery to see if something needs to be cleared electronically..? I'd first think it's vacume related. Try some carb cleaner squirted around the charger/intake. If it boggs, you know it's in that area. Lastly, call Jackson and ax them if this is a regular occurance? Keep us posted. E __________________ "If you can read, thank a teacher" "If you can read it in English, thank a VET"


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09-24-2009, 05:45 PM	#3
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	timing is dead on and I dont have an fitv...I have something like it on the back of the manifold but I swapped that out too and did nothing

09-24-2009, 07:09 PM	#5
89hatchd15b now its a 91 Join Date: Mar 2007 Location: Acton, CA Age: 21 Posts: 68 iTrader: 0 / 0% Ride: 91 civic dx hb with si harness and jdm d15b Rep Power: 6	sounds like a vacuum leak. check all the hoses and intake manifold gasket and such.

09-24-2009, 08:12 PM	#6
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	if it was a vacuum leak then y did the vacuum test good on the gauge? all the hoses are new and routed properly

09-24-2009, 08:36 PM	#7
89hatchd15b now its a 91 Join Date: Mar 2007 Location: Acton, CA Age: 21 Posts: 68 iTrader: 0 / 0% Ride: 91 civic dx hb with si harness and jdm d15b Rep Power: 6	I had the same problem on my jdm d15b vtec and it was a leak at the intake manifold gasket. Does that engine have an idle control diaphragm next to the throttle?

09-26-2009, 10:16 AM	#8
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	yes it has the diaphram but its sucking back and not touching the throttle the throttle blade is completely closed ...and all the vacuum lines are new and ran properly theyve been gone over multiple times...and the intake gasket is new and tightened properly

09-26-2009, 11:39 AM	#9
89hatchd15b now its a 91 Join Date: Mar 2007 Location: Acton, CA Age: 21 Posts: 68 iTrader: 0 / 0% Ride: 91 civic dx hb with si harness and jdm d15b Rep Power: 6	I don't know, I have only seen vacuum or timing issues causing a high idle. I will have to think about this one and get back to you.

09-26-2009, 02:29 PM	#10
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	dont feel bad it seems no one can help me with this problem

09-28-2009, 08:44 PM	#11
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	yes.... ive gone through so much

10-01-2009, 09:45 PM	#14
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	it did the same thing with the stock intake on also...and this has been on going for months now the battery is disconnected for days at a time sometimes.

10-01-2009, 09:48 PM	#15
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	i would doubt three iacv's ...two off running cars would malfunction the same...and ive had the car up to temp with fan running and bled the coolant system no air was in it....still stumped and going nuts

10-01-2009, 09:59 PM	#16
INJEN78 ¿GANGSTA GREMLIN? Join Date: Oct 2007 Location: CT(860) VT(802) Age: 21 Posts: 7,749 iTrader: 5 / 100% Ride: 91 CRX si Rep Power: 214	hmm...thats wierd..who did the harness? __________________ R.I.P BEN LEE2/24/08 we love and miss you http://burnoutbox.activeboard.com/in...BID=127652&p=1 GOOD FAST CHEAP, you can pick only two. fast and cheap isn't good good and cheap isn't fast good and fast isn't cheap

10-01-2009, 11:01 PM	#17
LS_VTEC you get the BRAKE Join Date: Dec 2007 Location: NJ Posts: 2,617 iTrader: 0 / 0% Ride: 99 YZF-R6 Rep Power: 43	What ECU are you using? __________________ eg hatch (jdm b16) sold 1999 Yamaha YZF R6 (modded) http://hondaswap.com/engine-building...ow-pics-102486 sold

10-01-2009, 11:06 PM	#18
LS_VTEC you get the BRAKE Join Date: Dec 2007 Location: NJ Posts: 2,617 iTrader: 0 / 0% Ride: 99 YZF-R6 Rep Power: 43	does your engine have a fast idle control solenoid valve? The 91 crx with the 1.6L engine has one.... __________________ eg hatch (jdm b16) sold 1999 Yamaha YZF R6 (modded) http://hondaswap.com/engine-building...ow-pics-102486 sold

10-01-2009, 11:19 PM	#19
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	i have 3 ecus 1 chipped from jet and 2 stock it does the same with all. no fitv it has something similar but u cant tighten anything on it like the obd1 models that was obviously one of the first things to pop up when i searched idle problems

10-02-2009, 12:16 AM	#20
INJEN78 ¿GANGSTA GREMLIN? Join Date: Oct 2007 Location: CT(860) VT(802) Age: 21 Posts: 7,749 iTrader: 5 / 100% Ride: 91 CRX si Rep Power: 214	yea the d16a6 mani doesnt have that plate.. __________________ R.I.P BEN LEE2/24/08 we love and miss you http://burnoutbox.activeboard.com/in...BID=127652&p=1 GOOD FAST CHEAP, you can pick only two. fast and cheap isn't good good and cheap isn't fast good and fast isn't cheap

10-02-2009, 12:45 PM	#21
riceracerex D-Series Ninja Join Date: Jan 2009 Location: Pryor, Ok Age: 23 Posts: 387 iTrader: 0 / 0% Ride: 90' Honda CRX Si Rep Power: 11	when my chip was not connected all the way on my pm6 ecu it caused it to idle @ 2500 but I was not able to rev past 3500 and it ran horrible. So it does not sound like there is a problem there. have you tried a compression test? IAC Valve or TPS Sensor? My D16z6 in My 93' Civic had this problem but after it warmed up sometimes it would stop the erratic idle, so just putting those out there. __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı" uɐɯ ǝlqısıʌuı uɐ ɟo sɹıoɯǝɯ ɯoɹɟ ǝʇonb ɐ ɟo pǝpuıɯǝɹ ɯ,ı

10-02-2009, 12:57 PM	#22
INJEN78 ¿GANGSTA GREMLIN? Join Date: Oct 2007 Location: CT(860) VT(802) Age: 21 Posts: 7,749 iTrader: 5 / 100% Ride: 91 CRX si Rep Power: 214	lol read the thread man..he already tried all that.. __________________ R.I.P BEN LEE2/24/08 we love and miss you http://burnoutbox.activeboard.com/in...BID=127652&p=1 GOOD FAST CHEAP, you can pick only two. fast and cheap isn't good good and cheap isn't fast good and fast isn't cheap

10-04-2009, 10:48 PM	#23
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	im going nuts ...i just keep staring at the engine in the garage waiting for it to say TADAAAAAA Im fixed its my last option hahahaha

10-07-2009, 12:12 PM	#25
crxnonvtec Junior Member Join Date: Jun 2009 Age: 26 Posts: 29 iTrader: 0 / 0% Rep Power: 1	im not quitting but after almost two years and being on every forum and reading through the shop manual u cant blame me for losing some hope hahahaha...and I sprayed starting fluid around the intake and no rpm change....I just dont know what would make the idle shoot up to 2500 and stay there...it runs good just idles high...no sputtering or hesitation ... sometime it sucks air through the hole in the tb and sometimes it doesnt idk ive just been over the engine so many times...and its always harder to describe something on the internet

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91 crx d16a6 Idle at 2500 rpm

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