Throttle body injectors not spraying

Can a throttle body injector spray TOO MUCH fuel. If you are unable to remove the air ducts to expose the throttle body stop and do not attempt this project.

If you do NOT get spray but hear an audible clicking then your electronic side is working fine and you do have a blockage somewhere.

Throttle body injectors not spraying. The main cause of throttle body injectors not spraying. Two groups fall into injector problems. The lighting of the Check Engine light in your dashboard is one of the obvious indicators of a stuck fuel injector.

The fault numbers connected mainly with a blocked fuel injector may vary from fault codes to lean codes. The obvious issue was the lack of spray from the injectors henceforth I replaced those first. Hindsight revealed the improbability of both injectors dying at the same time.

Reexamination revealed that direct introduction of starter fluid. Still cranks is spraying fuel but will not start go to step 2. Low volts 8 This is an indication of either a battery in a state of very low charge a bad battery or too much resistance in the system.

-record the battery voltage while cranking at the battery. -record the voltage at the pink wire of the injector connector while. When the injector is energized an electromagnet moves a plunger that opens the valve allowing the pressurized fuel to squirt out through a tiny nozzle.

The nozzle is designed to atomize the fuel or to make as fine a mist as possible so that it can burn easily. I find it hard to believe that all the injectors are bad or not working. 91chevy 50 l TBI wont spray any fuel out of injectors can spray chemtool carb cleaner in throttle body and it starts up.

Have replaced distributor twice still no injector spray. Could be clogged up clean injectors. Gunk in bottom of fuel tank can be sucked through and.

With throttle body injection you should be able to see fuel injectors spray pattern both fuel injectors. Even if injectors spray pattern looks good 5 psi wont start and run a v8. Check for applicable trouble codes.

The spark section can be good and the fuel section inoperativeI think it would be best if you can get a noid lighthook to the disconnected injector connector when the engine doesnt start and look for pulses at injector. If you had pulses and fuel up to the throttle bodyit would indicate a clogged injector or passage in the TB assembly. You should be seeing conical spray from the injectors.

Injectorspraypatternjpg 728456 483 KB If you dont see that either the fuel pressure is. The throttle body in a car provides the control of air and fuel injection so that the system runs efficiently and does not backflow. When this automotive part is not working correctly or its electronic sensors begin firing off readings to the onboard diagnostic computer showing problems it can create car problems.

Can a throttle body injector spray TOO MUCH fuel. Jump to Latest Follow 1 - 6 of 6 Posts. Scot Frmly scot.

Joined Apr 24 2005 535 Posts. Discussion Starter 1 Aug 17 2009. Hello my 87 Cutlass OBD1 with TBI fails the emissions test.

I have a 1989 Chevy Suburban 1500 2WD. I have fuel all the way to the throttle body but the injectors are not spraying. I also checked to make sure I have power at the connectors to the injector and i do.

I pulled a wire off the the Dist and help it close while it was turning over to see if I had a spark and I did not see one. Recorded on November 11 2008 using a Flip Video camcorder. Once the throttle body plate is in an open position spray the throttle body cleaner in the throttle body.

Do not spray a lot because you can overflood the engine. Spray 3-4 times on the plate itself and on the inside of the throttle body. Clean the throttle body with a clean towel.

Spray the injector or injectors with throttle body cleaner and gently clean the exterior and the tip of the injector with the brush. Do not insert any metal objects into the tip of the injector as this will enlarge the nozzle tip permanently damaging the injector. Last we will look at the spray pattern of a TBI throttle body injector.

It is located where the carburetor used to be and the fuel doesnt hit the hot intake valve that would atomize the fuel like the multi port injector systems. It has to spray the fuel in a. It will run if I pour fuel directly into the throttle body.

After doing this the fuel injectors would drip a little fuel at the next priming cycle then completely stop again. It was running just before the simple changing of the filter in the return line. The pump was replaced two days ago so it is new.

Loosen those and pull up with some firm force. The throttle body will pop up off the bike. From there take off the fuel delivery pipes and the injectors.

Use a spray type carburetor cleaner to clean the injectors and throttle bodies. Do not use a wire brush or anything abrasive Blow dry with an air compressor and put everything back together. Hello im new to this forum but i have an 1987 chevy 350 with throttle body injection.

It set up for a while year and half but it will not spray out of the injectors. Checked the wires goin to the injectors and they are supplying juice but the injectors just arent sprayin anyhting. Of course it is getting fuel to them cause it steadily dripped due to the fact that it.

A not calibrated throttle body can also cause this. You can calibrate the throttle body with most diagnostic scanners. The throttle body can affect the RPM the other way also.

It can cause the RPM to be so low at idle so that the engine will die. This is often caused when there comes a lot of soot and dirt on the throttle body. When re-installing lube the o-rings with a little grease I use dielectric insert the injector into the fuel railside cover and then carefully put them back into the throttle body.

Be careful not to ding the end of the injectors putting them back in. If you have fuel spray then there is a problem getting reference from your distributor often times its just a bad connection reseat the connector and wiggle it good to make sure its making good contact. If you do NOT get spray but hear an audible clicking then your electronic side is working fine and you do have a blockage somewhere.

In some cases both sides of the throttle body are connected to air ducts by means of hose clamps. In this case you only need to remove one side to expose the throttle body for cleaning. If you are unable to remove the air ducts to expose the throttle body stop and do not attempt this project.

Let a professional technician handle the job.