I have a 1996 suburban with an issue that need help with. My truck idle find revs up find only when you put it in gear and want to go it wants to die you let off the paddle and it fin you step on the gas want to chock it has no power. I have cleaned out throttle, change throttle position sensor, Map sensor and it runs the same. I'm not reading any codes no check engine light or nothing. what could it be. clog cat, bad fuel pamp?

10

Asked by Jun 03, 2015 at 09:44 AM about the 1996 Chevrolet Suburban C1500

Question type: Maintenance & Repair

I have a 1996 suburban with an issue that need help with. My truck idle find revs up find
only when you put it in gear and want to go it wants to die you let off the paddle and it fin
you step on the gas want to chock it has no power.  I have cleaned out throttle, change
throttle position sensor, Map sensor and it runs the same. I'm not reading any codes no
check engine light or nothing. what could it be. clog cat, bad fuel pamp?

8 Answers

16,255

Have the fuel pressure checked. Should be at 55psi and not leak down when turned off

2 out of 2 people think this is helpful.
10

I never done this before where should connect @ by the fuel filter or were.

1 out of 1 people think this is helpful.
16,255

There is a scherder valve towards the back of the motor

2 out of 2 people think this is helpful.
10

Also it runs fine @ times you just never know when. So if that happen it mean I have a bad fuel pump?

16,255

It could, or the regulator. The fuel pressure test will rule it out.

1 out of 1 people think this is helpful.
10

Ok So I check pressure and yes it's leaking down when turned off not holding. So it means I have a bad regulator or Pump

16,255

Yes, you can take the upper intake off and see if regulator is leaking. It is on the back of the injector unit. If it's leaking there will be a clean spot underneath it. Otherwise it should be rather dirty. If that checks out then it's the pump unless there is a break in a line somewhere.

1 out of 1 people think this is helpful.
10

Thank you! I will try it and let you know..Also this Truck sat for about 6 months but was turned on every other week.. I don't know if that will a difference

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