fuel pressure

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Mar 12, 2010 | 05:34 PM

z28camaro1996

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fuel pressure

i think my fuel pump maybe week. in high rpms only while driving i notice it being a little sluggish. and when i start it for the first time of the day, it turns over about 10 seconds, or if it turn the key 3 times first it will start right up.and some times when i start it, it will deisel untill i give it gas a couple of time. i replace the fuel filter, optispark,coil,icm. and it still does it.when it does it, it dont pop or feel like a miss. any suggestions?

Mar 12, 2010 | 05:45 PM

RamAir95TA

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Pick up a $30 fuel pressure test gauge at the nearest auto parts store and check your fuel pressure via the Schrader valve on the back of the intake manifold. Should be between 41-47psi with the key on, engine off, then drop 3 to 10psi at idle and slowly increase from there with throttle position.

Mar 12, 2010 | 06:26 PM

z28camaro1996

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if i remember right i checked it two years ago and i think it read 35 psi

Mar 12, 2010 | 06:27 PM

RamAir95TA

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That doesn't do you much good now, does it?

Mar 12, 2010 | 06:29 PM

stburgpete

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Have your battery and terminals checked first it might pay off to do it first. I thouhgt mine was going to but it was the terminals and the battery was weak.

Mar 12, 2010 | 06:30 PM

mrchyzy16

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im interested in this as well cause mine does the same thing too

Mar 12, 2010 | 06:31 PM

stburgpete

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Mine was as well. I got lucky. For now.

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Mar 12, 2010 | 06:40 PM

stburgpete

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Quote:

Originally Posted by z28camaro1996

ive been iching to get a walbro 255 and this might be my ticket. the car has 227000 miles on it and i changed the plugs and wires at around 180000. does any one think my plugs and wires are bad.

It is poss.

Mar 12, 2010 | 06:44 PM

#10

z28camaro1996

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oh yea about the battery thing. my gage is reading in the middle of 12 and the 14 volt mark.

Mar 12, 2010 | 06:52 PM

#11

stburgpete

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Quote:

Originally Posted by z28camaro1996

oh yea about the battery thing. my gage is reading in the middle of 12 and the 14 volt mark.

While it is running right. That is your alt. that is giving that reading.

Mar 12, 2010 | 06:59 PM

#12

z28camaro1996

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it reads that all the time i believe

Mar 12, 2010 | 07:05 PM

#13

stburgpete

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Just checked my 94 and it does not read that high when i turn the key on. Maybe my gauge is going. Just had everything checked out and new battery. Does anybody else know for sure?

Mar 12, 2010 | 07:10 PM

#14

z28camaro1996

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when i turned the altenator with out the belt on the other day and it squeaked a little bit and i noticed about 80% of the blades on the fan of it were gone.