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Is there anyway to check a fuel injector to see if its bad also is there anyway to clean them

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Test them with an ohm meter, they should all have near the same resistance across the two terminals,
and the best way to clean them is by filling your gas tank with a good grade fuel and adding seafoam to the tank, you can get it at any auto parts store and most hardware stores

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Posted on Mar 26, 2015

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You can check to see if the injector is cycling by touching it with a long screwdriver then put your ear on the handle you should be able to hear clicks ( motor must be running) I use sea foam in my gas to keep fuel system clean

Posted on Apr 22, 2014


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97 ford 4.0 idles smooth, accelerate there is a point where motor sputters if i back off and then push harder it smooths out.engine light on code says #3 sparkplug but seems to be firing fine at idle

There's no code that says, "#3 spark plug" but there is a code P0303 which indicates a misfire has been detected on cylinder #3. That misfire could be due to a spark plug, but it could also be a bad spark plug wire or CoP, a bad fuel injector, bad injector wiring, burnt valve, etc. Changing the spark plugs and wires would likely be the easiest and one of least expensive places to start, especially if the truck is due for a tune up anyway, but if that doesn't fix it, consider the fuel injector next. Just because it idles fine does not mean that the spark is strong at higher engine speeds.

You might also want to clean your MAF sensor and check the linearity of your throttle position sensor (TPS) to make sure the stumble is not due to a bad spot in the TPS.

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I have a 1992 Chevy S10 Blazer Vin code W. I have fuel to the purge valve, is there anyway to flush the spider? It runs if u put gas in the snorkle till the gas runs out.

Purge valve? That is part of the emission system! Nothing to do with injectors. If the injectors are not supplying fuel and the fuel pump/pressure is good, look for a bad fuse. Does the check engine light illuminate during a bulb check? Check power and ground supply to injector harness plug. If no check engine light during bulb check, suspect a fuse/power supply issue

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After changing the coil pack and spark plug, why is it still skipping?

Timing could have jumped. Could be a bad head gasket also. even possible to be a small hole in piston check the cylinder for compression. Check the fuel injector to that cylinder if you have bad air to gas mixture it will throw a code of misfire change fuel filter check fuel injector to see if clogged. most likely it is the fuel injector .

Feb 26, 2016 | 2002 Chevrolet Chevrolet TrailBlazer LS

1 Answer

Why do I have a DTC PO204 never seen this before took off fuel rail the other day cleaned injectors and now have this code switched injector with another cylinder code stayed the same cylinder

Check the connector on cyl. #4 for damage and make sure none of the wires pulled out. Clean terminal anyway with electronic spray. Check all your ground wires too.

Oct 18, 2015 | Cars & Trucks

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Check engine light was on in 99 Mercury Grand Marquis, went to autozone to run codes they came up as F1131 and F1151 which was for fuel injectors. I was told that Lucas Oil Fuel Injector cleaner would...

Gasoline itself a solvent, therefore its an excellent injector cleaner in of itself. No additives I have ever used worked, ended up replacing things anyway. Save some money, don't buy the lucas treatment, get some new injectors installed. Might not be a bad idea to change out your fuel filter also.

Nov 19, 2013 | Cars & Trucks

1 Answer

I think my fuel injectors need cleaning or one may be failing is there away to clean them myself other than putting fuel injector cleaner in there anyway to tell if one is failing also is there

No, you cannot clean furl injectors. Fuel today contains cleaners and 99.9% of injector failure is due to an injector whose electrical winding create no or low voltage or high voltage. Either way the faulty injector will cause the engine to miss or run poorly. You can use a volt meter to check voltage. With the volt meter touch each probe to either terminal on the injector. A normal ohm reading would range from 11.8 -12.9 ohms. Any reading from 1.0 to 8.0 or 15.0 and higher, the injector is no good and should be replaced.

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2 Answers

Have a 2001 ford f250 super duty need to know how to check fuel injectors......truck was running fine and then the enine ran real rough and when you push the gas pedal to the floor there is little...

The fuel injectors have a resistance of between 10 to 18 ohms.Test each injector. If any of the injector readings are higher or lower than they should be, you need to replace them.
For more troubleshooting:---

Put a long screwdriver directly on the injector while the car is running. Hold the handle up to your ear. You should be able to hear a rhythmic clicking sound. If you do, your injector is good. Hearing a clunk-clunk type noise means you have found your problem. Hearing silence or unusual clicking patterns means either the injector, wires or plunger may be bad or sticking. You will either have to clean or replace them.

---------- To know more about fuel injectors and troubleshooting.Please click on the link below:---


Many a times you get black smoke from exhaust due to faulty injectors.Check fuel injectors. Leaking injectors create an overly rich air/fuel mixture and cause black smoke. Take the valve cover off and look at the exhaust part of the injector, when it is running. Each time the injector fires, you should see oil exhausting from it. If you see oil coming out, then the injector is good. When replacing a bad injector, take the glow plug out and crank the engine to get any oil out of the cylinder.----------------- This should help.Thank you.

Jan 25, 2011 | 2001 Ford F250 Super Duty Super Cab

1 Answer

My car studders from first to second. No transmission codes . possible MAS issuse both read outs sensors came up lean fuel mixture. Opened the MAS an it was clean but cleaned it anyways. The service...

sometimes it's as simple as replacing your gas cap. i know it sounds funny but your codes will resd fuel leak or fuel problem, but if you loose fuel pressure by a leaky gas cap, your codes will read fuel issue, as for the check engine light you can resetyour computer by disconnecting the positive cable only from your battery for 5 to 10 mins. the light will go off, but if you have a faulty sensor, it will, come back on. i would look to a bad egr valve befre i would the 02sensors. good luck and thank you for choosing

Nov 15, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Bad gas / geo 95 prizm

I would try using a fuel system cleaner from the auto-parts store and change out the fuel filter. The gas additive will help clean out the fuel injectors and the fuel filter maybe need to be changed anyway because of the age of the vehicle.

A clogged fuel filter would cause this problem.

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2 Answers


sound like you have a bad fuel pressure regulator . check your fuel pressure. could also be a leaking injector. the fuel pressure test will tell you which one

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