Common questions

Why arent my injectors firing?

Why arent my injectors firing?

No flashes from the injector circuit when cranking the engine; would tell you the (PCM) is not pulsing the injectors. If the injectors appear to be working, but the engine will not start; the engine may be flooded. As a result, you may have to remove the spark plugs to let them dry.

What kind of fuel spray does a 1988 S10 use?

1988 S10 2.5 TBI, 5 speed. No fuel spray from injector. Got this for my step son who is 1st year electrician apprentice. The vehicle is old and worn, but didn’t burn oil. Before it died there was an issue with chugging, it would shake and buck and rattle the whole drivetrain real bad.

What kind of injector does a Sonoma 88 S10 use?

Compnine also lists the 92 sonoma with a fuel injector as a ACDelco #217-338. On the 88 s10 the fuel injector is a ACDelco #217-336. Thanks for the help. The Throttle bodies look the same, the injectors may have some internal difference, perhaps the 92 has higher fuel pressure, the 88 only has 9 to 13 lb fuel pressure.

Where is the fuel injector on a GM TBI?

The GM TBI (Throttle Body Injection) system uses a pair of low pressure fuel injectors mounted above the throttle body opening. Unlike a port fuel injection system, that sprays fuel into the intake manifold runner just above the intake valve, the injectors in this system spray fuel directly into…

What’s the fuel pressure on a Chevy’s 10?

I checked the fuel pressure and it is reading 11psi down to about 7psi. The pressure moves down and back up slowly as you race the engine and basically is pretty stable most of the time around 9-10psi.

What is the TBI code on a 1990 Chevy truck?

Consult a service manual or see below for any check engine light code definitions. You can use a late 80’s or early 90’s GM TBI definition. If you have access to a scan tool use a hook up for a 1990 350 cu. in. 5.7L Chevrolet truck. For some scan tools enter VIN 10th“L” 3rd“C” 8th“K”.

Why is my TBI fuel injection light on?

Troubleshooting your TBI Fuel Injection System Most of the problems encountered while installing your fuel injection system or after a time of operation are very simple. If your check engine light is on you more than likely have a hard fault meaning something is grounded out, unplugged, operating out of range or has gone bad.

Why is my fuel injection system plugged in?

The electric fuel pump installed for a fuel injection system will draw considerable more volume of fuel from your tank than your old system did. If there are any contaminants in the tank this many times will plug up or greatly restrict the flow of fuel to the system causing many issues. Step by Step Troubleshooting guide.

What causes a vacuum leak in a fuel injection system?

Vacuum leaks are the leading cause of installation issues with your fuel injection system. Check all sources of potential vacuum leaks including components not related to the fuel injection system. There are instances where the vacuum leak is coming from the adapter plate used to attach the throttle body to the manifold.

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Ruth Doyle