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Fuel issue?

Tiny
CLEVERNAMEHERE
  • MEMBER
  • 1995 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 153,000 MILES
I have a 95 chevy blazer 4x4 4dr. Its idels fine but when I start to drive it it acts like its not getting enough fuel it starts hesitating. I checked the fuel pressure and its right where it should be. Please help.
Monday, January 31st, 2011 AT 1:26 PM

14 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Did you observe the fuel pressure as the problem was occurring? What was the lowest pressure reading?
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Monday, January 31st, 2011 AT 1:49 PM
Tiny
CLEVERNAMEHERE
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  • 9 POSTS
The Pressure was inbetween 55 and 64. At idel it was at 55 and when givin gas it was at 60.
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Monday, January 31st, 2011 AT 5:09 PM
Tiny
WRENCHTECH
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The question was, did you observe this while the problem was occurring, meaning while driving down the road? The pressure reading doesn't mean anything if it was taken while the symptom wasn't present.
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Monday, January 31st, 2011 AT 5:13 PM
Tiny
CLEVERNAMEHERE
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Oh sorry, I was driving down the road.
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Monday, January 31st, 2011 AT 5:15 PM
Tiny
WRENCHTECH
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Really?
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Monday, January 31st, 2011 AT 5:18 PM
Tiny
CLEVERNAMEHERE
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  • 9 POSTS
When I'm driving it starts out fine then after about 1-2 min it starts doing it
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Monday, January 31st, 2011 AT 5:20 PM
Tiny
CLEVERNAMEHERE
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I didnt leave the pressure test on there when I was driving though
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Monday, January 31st, 2011 AT 5:21 PM
Tiny
WRENCHTECH
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I didn't think so. That is what needs to be done though. We usually feed the hose under the back of the hood and tape the gauge to the windshield. Make sure you stick a small block or something next to the hose so the hood doesn't pinch it.
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Monday, January 31st, 2011 AT 5:25 PM
Tiny
CLEVERNAMEHERE
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  • 9 POSTS
All right I guess that is my next step thanks. Ill get back to you when I find out more. Thank you
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Monday, January 31st, 2011 AT 5:26 PM
Tiny
CLEVERNAMEHERE
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  • 9 POSTS
Well I drove it with the gauge on and it does it when the pressure is at 62.
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-1
Monday, January 31st, 2011 AT 6:38 PM
Tiny
CLEVERNAMEHERE
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It never drops. It stays steady around 60 when driving.
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Monday, January 31st, 2011 AT 6:40 PM
Tiny
WRENCHTECH
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OK, that allows us to eliminate fuel supply. At this point you're going to need to use a scan tool to analyze the sensor data to try to get a picture of what is taking place when this happens. You need to see if it's going rich or going lean and see if there is a sensor triggering it.
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Monday, January 31st, 2011 AT 6:44 PM
Tiny
CLEVERNAMEHERE
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  • 9 POSTS
It doesnt have OBD 2. I need an OBD 1 for it. Where can I get a scan tool for it?
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Monday, January 31st, 2011 AT 6:46 PM
Tiny
WRENCHTECH
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You're talking about a $5000 tool. You're going to have to pay someone to diagnose it for you.
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Monday, January 31st, 2011 AT 6:48 PM

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