Idle surge after fuel pump change

ddarkslayer · August 24th, 2009, 10:30 PM

I had a bad Idle because I was told I had a bad fuel pump. the fuel pressure was sitting at 10 psi and I changed the fuel pump to a carter fuel pump that I bought at kraigen and I helped but it didn't fix its Idle problem what could it be

sickfox · August 24th, 2009, 10:35 PM

Originally Posted by ddarkslayer

I had a bad Idle because I was told I had a bad fuel pump. the fuel pressure was sitting at 10 psi and I changed the fuel pump to a carter fuel pump that I bought at kraigen and I helped but it didn't fix its Idle problem what could it be

what else have you tried? whats is your fuel pressure at now?

ddarkslayer · August 26th, 2009, 04:08 PM

IDK I feel like its a little higher. If i change to a BBK 255 lph fuel pump do you think it will fix it

grnstang · August 26th, 2009, 04:50 PM

i doubt its the fuel pump causing the idle issue. did you change the filter while you were at it? how does it run otherwise? WOT?

ddarkslayer · August 26th, 2009, 08:11 PM

Originally Posted by grnstang

i doubt its the fuel pump causing the idle issue. did you change the filter while you were at it? how does it run otherwise? WOT?

I changed the filter before I changed the fuel pump the car would surge violently only when the engine warms up then when I changed the fuel pump the car slighly fixed the surge it still surges but not as bad

93hatch · August 26th, 2009, 08:22 PM

did you put your fuel filter in backwards?

superbean · August 27th, 2009, 08:53 AM

Originally Posted by 93hatch

did you put your fuel filter in backwards?

that's what I was thinking..

ddarkslayer · August 27th, 2009, 03:27 PM

no its the right way

ddarkslayer · August 27th, 2009, 03:29 PM

Originally Posted by superbean

that's what I was thinking..

I saw the flow arrow and made sure it wasn't on backwards

ddarkslayer · August 27th, 2009, 03:34 PM

I feel like the fuel pump is for 4 cylinder cars like the escort taurus and the focus so it doesn't put out enough pressure and when I pulled out my walbro I compared them both and I see the carter fuel pump has a smaller port on it than the walbro

August 24th, 2009, 10:30 PM	#1
ddarkslayer Hardcore Enthusiast 1988 Mustang 5.0 LX 12.48@118.27 Join Date: May 2009 Location: Folsom, CA Posts: 1,445 iTrader: 0 reviews	Idle surge after fuel pump change I had a bad Idle because I was told I had a bad fuel pump. the fuel pressure was sitting at 10 psi and I changed the fuel pump to a carter fuel pump that I bought at kraigen and I helped but it didn't fix its Idle problem what could it be

August 26th, 2009, 04:50 PM	#4
grnstang Hardcore Enthusiast 91 LX 13.7@101 Join Date: Oct 2008 Location: Norwalk OH Posts: 1,426 iTrader: 1 reviews	i doubt its the fuel pump causing the idle issue. did you change the filter while you were at it? how does it run otherwise? WOT? __________________

August 26th, 2009, 08:22 PM	#6
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	did you put your fuel filter in backwards? __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

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August 26th, 2009, 04:08 PM	#3
ddarkslayer Hardcore Enthusiast 1988 Mustang 5.0 LX 12.48@118.27 Join Date: May 2009 Location: Folsom, CA Posts: 1,445 iTrader: 0 reviews	IDK I feel like its a little higher. If i change to a BBK 255 lph fuel pump do you think it will fix it

August 27th, 2009, 03:27 PM	#8
ddarkslayer Hardcore Enthusiast 1988 Mustang 5.0 LX 12.48@118.27 Join Date: May 2009 Location: Folsom, CA Posts: 1,445 iTrader: 0 reviews	no its the right way

August 27th, 2009, 03:34 PM	#10
ddarkslayer Hardcore Enthusiast 1988 Mustang 5.0 LX 12.48@118.27 Join Date: May 2009 Location: Folsom, CA Posts: 1,445 iTrader: 0 reviews	I feel like the fuel pump is for 4 cylinder cars like the escort taurus and the focus so it doesn't put out enough pressure and when I pulled out my walbro I compared them both and I see the carter fuel pump has a smaller port on it than the walbro

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