Question about Chevrolet Suburban 1500

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1996 suburban 5.7. how much pressure is needed @ fuel rails?

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If it has a common fuel rail and electronic injection about 150bar

Posted on Oct 02, 2010


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Hard starting and fuel pressure around 50 psi sometimes slow to get there

It is your fuel pressure regulator is bad replace it. Please rate my solution it is why i do what i do thanks in advance. The fuel pressure regulator is what holds the fuel pressure in the fuel rail if this is defective the fuel rail can not keep enough pressure to fire threw the injectors. Also change your fuel filter at the same time. If the mileage is very high looking into fuel pump replacement at this juncture would be wise to do preventive work keeping the down time of your auto to a minimum. Thanks in advance please rate.

Apr 14, 2012 | 1996 Chevrolet Suburban

1 Answer

Need to change fuel filter on 2002 suburban and was told need to release fuel system pressure before begining

there is a release valve fitting on the fuel rail inside the engine looks like a tire valve stem and it may have a cap on it. you need to follow the fuel line up to the fuel rail(s) to find it...when you find it unscrew the cap and depress the little pin inside with a nail or sure to shield yourself as the pressure may be somewhat significant...they use this port to test your fuel pump pressure.

Dec 18, 2010 | Chevrolet Suburban 1500 Cars & Trucks

2 Answers

It seems like fuel problems. i got fuel coming to the top and its good pressure..engine start for about 4 or 5 sec and die ???helpcould it be the regulator?I have installed new

The real test is to use a fuel pressure tester. It sounds like the fuel pump is making the initial prime but failing to build pressure. This could be a bad fuel pump or it possible that you have a bad fuel pump relay.
I would test the fuel pressure on the fuel rail first, if you have consistant pressure generally above 25PSI, (check MFG. spec..) then I would consider checking the regulator. If you lose pressure just after the start up then try replacing or swapping the fuel relay and see if this corrects it. If not then chances are your going to have to replace the pump.

Jul 30, 2010 | 1999 Chevrolet Suburban

1 Answer

Chevy burb 2005 fuel pressure drops in rail after vehicle sits for awhile... where is the Presurre Regulator?

The pressure regulator is located on the left side; driver side common rail -- however, that is most likely not your problem. You either have a bad check valve in the fuel pump inside the fuel tank or you have a fuel injector staying open...and leaking fuel pressure. The regulator only works when the vehicle is running.

Aug 02, 2009 | 2005 Chevrolet Suburban

1 Answer

Fuel problem on 2003 Suburban 2500; 6.0 engine

There is a fuel test port on fuel rail...on left side of the engine.

Apr 25, 2009 | Chevrolet Suburban 2500 Cars & Trucks

2 Answers

Truck would not start, gave it a blast of ether, it started

get your self a fuel pressure tester, hook it up to the fuel rail, you should get at least 30 psi with key on, 30 to 45 psi with engine running.

Mar 11, 2009 | 1996 GMC Suburban

2 Answers

Chevy Suburban injection system

check your entire ignition system especially the ignition control module

Dec 26, 2008 | 1998 Chevrolet K1500

1 Answer

I have a 1996 gmc suburban good fuel pressure and spark it will idle but when you bring up the rpms it dies out any ideas

what is the fuel pressure under a load? try disconnecting the MAF sensor if the fuel press is ok, if the MAF is bad the engine will run better.

Dec 24, 2008 | 1996 GMC Suburban

4 Answers

Service engine light on showing code p0089

Diagnostic trouble code P0089 - The ECM commands the Bosch high-pressure fuel pump to deliver a specific fuel rail pressure - that can vary up to 23,000 psi depending on load and speed. The actual pressure is monitored via the fuel rail pressure sensor. If the fuel rail pressure varies more than desired or if commanded fuel pump flow is 100mm3/second or less, DTC P0089 will set.

Corrective action includes measuring the fuel rail pressure using a Tech II scan tool, then compare that to commanded fuel rail pressure with the engine running at 2000 rpm. The difference must be less than 20 Mpa.

A blockage in the fuel tank or plugged fuel filter could cause this fault (excessive vacuum in fuel line). If there is less than 5 in Hg of vacuum when measured at the fuel pressure test port at 3000 rpm, the fuel pressure regulator could be defective, and may need to be replaced. The fuel pressure regulator (FPR) is a sub assembly located on the Bosch high-pressure fuel pump.

Jul 30, 2008 | 1996 Chevrolet Cavalier

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