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2008 chevy silverado injectors not working fuel pump is great at 60 psi spark is good if i pur starting fluid engine rum

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Anti-theft system problem with cause the PCM to not energize the fuel injectors . Do you have a symbol of a car an padlock lit on the instrument cluster ? This causes a DTC -diagnostic trouble code to set in the BCM , PCM !

Posted on Dec 02, 2016

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You need to scan the engine computer for OBD2 fault codes and see what shows up that may explain this failure.

Posted on Dec 02, 2016

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1998 chevy 1500 silverado 5.7 z71 4x4 auto transmission Cranks wont start. The crsnk senser ok Has spark at coil Has good fuel pres I use start fluid thys to start What am missing Help


What engine does your truck have ? does it have The Central Sequential Fuel Injection (Central SFI) (4.3L, 5.0L, 5.7L) ? Is your fuel pressure with in (60-66 psi). if not , will not start . I find this a lot also fuel pressure regulators leaking will cause a hard start . https://youtu.be/09_wQ9yQ85A

Nov 01, 2015 | Cars & Trucks

1 Answer

What causes o low injector pulse


Is that static pressure with key on, engine off? Or engine running pressure? Both should be near 60, usually key on, engine off pressure will be about 3 or 4 psi higher.
If it runs good after starting, the injector pulse must be good. No reason why starting and running pulse should be different. Only difference is when running, fuel pump power is kept on by the oil pressure switch, whereas in starting, the fuel pump relay keeps the pump on. Very unusual, let us know. Measure voltage at one of the injector's power wire with key on. It should be battery voltage or very close.

Aug 22, 2015 | Cars & Trucks

1 Answer

2001 chevy blazer Lt 2w Drive 4.3 No Start Condition


Make sure the battery has a full charge.

Are you missing anything besides fuel? Engine cranking visually check for spark at the spark plugs. Also, check for fuel injector pulse. If your missing everything, check for an rpm signal.

With the spider fuel system, start-up fuel pressure can be critical, around 60--66 psi. At the fuel pump connector, engine cranking, gray wire is voltage, black is ground. If good voltage and ground with no fuel pump action, have to suspect the fuel pump.

Jul 21, 2015 | 2001 Chevrolet Blazer

1 Answer

1996 Blazer not starting


You have spark ? Try spraying starting fluid in the engine and see if it starts . . videos on youtube for testing cam sensors .

Aug 22, 2017 | Chevrolet Blazer Cars & Trucks

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454 mechanical fuel pump , wont stay running


Not enough fuel pressure if this truck is fuel injected.In 1999 chevy fuel systems need at least 52 psi to open the popet valve inside the injector to allow fuel thru.Fuel pressure specs are 60-66 psi with on and engine off.

Dec 04, 2011 | 1999 Chevrolet Silverado 1500

2 Answers

98 chevy 350 does not star check fuel ok,check spark ok, if I put some starter fluid on the throttler valve it run, but then turn off


The fuel pressure has to be 55 to 60 psi. even if the fuel pressure was 50 psi it will start but stumble on acceleration.by adding starter fluid you verified the problem

Sep 13, 2011 | 1998 Chevrolet C3500

1 Answer

Chevy truck year 1998 silverado 1500 350 engine what sensor is it that lets the gas get to the carborator i change the ignition mar under the distbor cap put a new gas filter check the fuses. i check my...


i'm pretty sure you have a Central Port Injection setup on this engine. Which means the injectors are inside of the upper plenum and cannot be seen. This type of fuel injection system uses a centrally located electric fuel injector(s) which feed fuel to a mechanical poppet style injector which is routed directly above the intake valves for each cylinder.

The poppet valves require a minimum of 56 psi of fuel pressure. If you have 55 psi it will not start. It needs the fuel pressure to overcome the mechanical resistance of the poppet injectors. Fuel pressure should at least be 60 psi. It is very important to check fuel pressure with an accurate gauge.

If fuel pressure is low it will not start no matter what you do and a new fuel pump will likley fix the problem. Get a good quality pump such as an a/c deco or Dephi. Other brands may be cheaper but they will not last.

If fuel pressure checks out good let me know and I'll give you some more info.

Jun 29, 2011 | 1999 Chevrolet Silverado 1500

2 Answers

1997 Chevy Silverado 1500 4x4 will not start. Getting spark checked all fuses, changed rotar - spark plug wires,


Have you checked the fuel pressure? Fuel pumps are a common failure item on those trucks. Pick up a cheap fuel pressure gauge and hook it up to the shrader valve on the fuel rail. With the ignition on and you should have 55-65psi. Even if it's a few psi below spec it could stop the engine from firing.Once you determine the fuel pressure isn't adequate make sure you have a good power and ground at the fuel pump. If that checks out, time for a new fuel pump module. I recommend only replacing it with an AC delco unit, I've heard bad stories about aftermarket replacements.
You could also spray some carb cleaner or starting fluid in the throttle body and crank the engine over. If it runs for a few seconds after spraying starting fluid in you know you have a fuel delivery problem.

Mar 14, 2010 | 1999 Chevrolet Silverado 1500

4 Answers

I have a 98 chevy silverado 1/2 ton 5.7L motor. My truck will only start after I turn the key over and over to allow the fuel pump to run. I sometimes do it 10 times before it actually starts. After its on...


The problem may be that it has 55 psi instead of 60-65. Could be the fuel pressure regulator or the fuel pump itself. I have read that these engines need 60 psi minimum to start reliably. Also with the engine off, look down the throttle body with a flashlight and see if the intake appears wet inside, indicating leaking central injectors. There is an upgraded injector assembly available with pressure regulator at autoparts stores. Requires 4-5 hours to replace with experienced mechanical skill level. Would definately upgrade if the pressure regulator needs replaced anyway.

Mar 11, 2009 | 1998 Chevrolet K1500

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