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post #1 of 5 Old September 25th, 2014, 05:16 PM Thread Starter
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New here and need some help with my 2.3L

Hey everyone, I'm Matt and I have a 89 Ford Mustang with a 2.3L engine and a automatic transmission. It's got 139,000 miles on it I believe and right now I'm having problems with it running and wanting to rev up when it is running.

So here's the deal, it starts very hard and I have to cycle the key to build up fuel pressure on it. Then it will start but runs really rough. Like I can't even rev it up.

I have installed new spark plugs and it didn't really help, I also ran sea foam threw the brake booster vacuum line. Also didn't help.

I am going to do a fuel pressure test on it tonight and see how much pressure it has. Can anyone tell me how much pressure it should have? Or a pressure range for good or bad?

Any feed back will be much appreciated
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post #2 of 5 Old September 25th, 2014, 05:50 PM
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Between 35 and 40

1991 Mustang LX 2.3L 5 Speed convert
1989 Ranger 4X4 2.5L 5 Speed solid Dana 30 front axle, 4.5" suspension lift, 3" body. ( blown up....)
Entire turbo kit waiting to be used again.
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post #3 of 5 Old September 25th, 2014, 09:47 PM Thread Starter
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Okay, Well I have 0PSI, Gauge didn't even move! So I guess its time for a new pump!
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post #4 of 5 Old September 25th, 2014, 10:19 PM
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Yeah, a bad regulator would at least make some pressure. You can get a 225lph pump on eBay for about $50. Replaces the stock pump, and leaves plenty of room for upgrades later if you should be interested.

1991 Mustang LX 2.3L 5 Speed convert
1989 Ranger 4X4 2.5L 5 Speed solid Dana 30 front axle, 4.5" suspension lift, 3" body. ( blown up....)
Entire turbo kit waiting to be used again.
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post #5 of 5 Old September 25th, 2014, 11:58 PM Thread Starter
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Yeah, I already got a complete fuel pump assembly from a previous mustang. It's a brand new pump so I think I'm just going to throw that in!
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