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uptownsamcv · 07-15-2008, 01:12 PM

im new ot the hinda scene and i have a 89 crx si. the fuel injection system that it came with is a resisterless PR4 A02 its a chipped 90 integra LS ECU. The intake manifold apears to be off a 92 - 95 civic. what im wondering is how high should the fuel pressure be? rigth now its at 45 when idling and jumps to about 60 under throttle. the car came with a adjustable fuel pressure regulator and pressure gauge hooked up. The car idles real low and tends to sputter when i give it a certain throttle amount also spits out lots of black water. and for some reason it seems to pull hardest around 4,800 rpm. im thinkgn of just going with a stock fuel pressure regulator cause i dont see why i realy need the adjustable one. im thinkign its making the car run rich.

sorry for the long post.

INJEN78 · 07-15-2008, 01:48 PM

umm what motor is in the car???
the pressures sound around right,,,but those adjustable FPR gauges are garbage
and black water?!?!?thats not good..black is rich,but there shouldnt be water

uptownsamcv · 07-17-2008, 03:07 PM

its a D16a6 with high comp pistons and i think he said the head was had a 3 or 5 angle valve job.

t3t4delsol · 07-17-2008, 06:24 PM

yeah waters not a good sign, has the car been sitting for a while? Cold air intake? if so someone could have hydrolocked the motor and there could be water sitting in the header and exhaust. Is it smoking at all?

uptownsamcv · 07-22-2008, 10:35 AM

it is definately something with the fuel system. i lowered the fuel preasure to 40 with the vacum line reoved from the AFPR and set it to 40PSI and 30PSI at idle and it runs practlicly flawless. i think i might bump the pressure up to 45 cause thats whats the recomended pressure for the newer resisterless injectors. plus i think it migth be runnin a bit lean cause the engine light came on and it never use to. the car does seem easier to drive now and i dotn have to give it as much throttle as before. only time i realy notice the sputter and its barely noticeable is when im doing around 60 and i hit the gas a certain amount. im thinkign maybe i should change the MAP or TPS sensor.

07-15-2008, 01:12 PM	#1
uptownsamcv Member Join Date: May 2008 Posts: 31 iTrader: 0 / 0% Rep Power: 4	fuel injection questions. im new ot the hinda scene and i have a 89 crx si. the fuel injection system that it came with is a resisterless PR4 A02 its a chipped 90 integra LS ECU. The intake manifold apears to be off a 92 - 95 civic. what im wondering is how high should the fuel pressure be? rigth now its at 45 when idling and jumps to about 60 under throttle. the car came with a adjustable fuel pressure regulator and pressure gauge hooked up. The car idles real low and tends to sputter when i give it a certain throttle amount also spits out lots of black water. and for some reason it seems to pull hardest around 4,800 rpm. im thinkgn of just going with a stock fuel pressure regulator cause i dont see why i realy need the adjustable one. im thinkign its making the car run rich. sorry for the long post.

07-15-2008, 01:48 PM	#2
INJEN78 ¿GANGSTA GREMLIN? Join Date: Oct 2007 Location: CT(860) VT(802) Age: 21 Posts: 7,728 iTrader: 5 / 100% Ride: 91 CRX si Rep Power: 214	umm what motor is in the car??? the pressures sound around right,,,but those adjustable FPR gauges are garbage and black water?!?!?thats not good..black is rich,but there shouldnt be water __________________ 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

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07-17-2008, 03:07 PM	#3
uptownsamcv Member Join Date: May 2008 Posts: 31 iTrader: 0 / 0% Rep Power: 4	its a D16a6 with high comp pistons and i think he said the head was had a 3 or 5 angle valve job.

07-17-2008, 06:24 PM	#4
t3t4delsol Senior Member Join Date: Mar 2008 Location: York, Pa Age: 26 Posts: 652 iTrader: 0 / 0% Ride: 97 del sol si turbo / dd is a 95 eclipse gsx Rep Power: 16	yeah waters not a good sign, has the car been sitting for a while? Cold air intake? if so someone could have hydrolocked the motor and there could be water sitting in the header and exhaust. Is it smoking at all?

07-22-2008, 10:35 AM	#5
uptownsamcv Member Join Date: May 2008 Posts: 31 iTrader: 0 / 0% Rep Power: 4	it is definately something with the fuel system. i lowered the fuel preasure to 40 with the vacum line reoved from the AFPR and set it to 40PSI and 30PSI at idle and it runs practlicly flawless. i think i might bump the pressure up to 45 cause thats whats the recomended pressure for the newer resisterless injectors. plus i think it migth be runnin a bit lean cause the engine light came on and it never use to. the car does seem easier to drive now and i dotn have to give it as much throttle as before. only time i realy notice the sputter and its barely noticeable is when im doing around 60 and i hit the gas a certain amount. im thinkign maybe i should change the MAP or TPS sensor.

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fuel injection questions.