Question about 1993 GMC Sierra K1500

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Engine running ruff ,engine misfiring even after plug change ,wires changed rotor and distributor

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Check the map sen check for vacuum and check to see if at idle if removed vacuum from the map sens Eng should stall however it a known wit the distributor pick up coil to not put out a good signal to the coil their for poor spark and poor idle also check for water in fuel

Posted on Nov 16, 2010

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Posted on Jan 02, 2017

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3 Answers

Every time it starts raining truck starts missing and cutting out it's a 97 f 150 ford 4.6 motor.


Possibly a plug wire or cracked distributor cap. I'd take a spray bottle and while it's running (be careful not to get your body parts in danger of the fan) spray some water on the cap area. If everything seems fine, you could spray down each plug wire at a time. See if you find the culprit that way. For a vehicle so old, if you haven't done a tune up lately. It's probably a good time. Replace the distributor cap and rotor. Plugs and wires.

Mar 27, 2016 | Ford Cars & Trucks

1 Answer

2000 trail blazier with random misfire,sulfur smell, glowing convertor. New cap,rotor button plugs,plug wires and convertor NO CHANGE ! ANY IDEAS ?


Is the check engine light lit ? Any DTC'S - diagnostic trouble codes ? What engine ? 4.3 L vortex . Leaking fuel pressure regulator under the upper intake manifold . Leaking fuel injectors ! Ignition timing problem . How does the engine run ? Who installed the plugs an wires ? are they right ? Fuel pressure leak down test, fuel injector balance testing . Check distributor drive gear an slop in the shaft . Did you have distributor out ? Is it in the proper position ? What cylinder is misfiring ? engine mechanical problem ! What do spark plugs look like ? fouled , soaked with fuel . Do a engine compression test .
The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the CMP sensor will not affect driveability. The sole purpose of the CMP sensor is to provide the VCM with the necessary information for the misfire DTCs.

Nov 10, 2015 | Cars & Trucks

1 Answer

Po302, 1999 Jeep Cherokee #2 cylinder misfire


Try checking fuel injector.
Try checking compression.
Is the engine running ok, maybe you're getting a bad code, if so you need to find out how to clear it, sorry I can't help you with that. Good luck

Sep 24, 2015 | 1999 Jeep Cherokee

1 Answer

Misfiring.


need do a tune up change spark plugs and wires.clean fuel injectors and change fuel filter.if engine equiped with distributor replace distributor cap and rotor.if vechicle still misses.could have bad ignition coil or cylinders have low compression.

Jan 13, 2013 | 1994 Toyota Corolla

4 Answers

I have a 1996 nissan sunny fuel injected ... i have changed the plugs, injector rail, distributer, throttle body, and my engine is still misfiring can some one advise me please..


inspect the wiring for loose connections or bad wiring.

try adjusting first the distributor by turning it. It should adjust the timing. Other than that inspect the timing on the timing chain or the chain may have developed a slack.

Sep 02, 2011 | 1996 Nissan Sentra

1 Answer

What are all of the parts needed for a tuneup for my 95 quests


Spark plugs, spark plug wires, distributor cap, and distributor rotor. If you replace all of these you would be doing what is called a major tune-up.

A regular tune-up would be just replacing the spark plugs.

You can check the integrity of the plug wires and distributor cap by spraying them with water while the engine is running. If the engine runs ruff, stall, or you see spark arcing from either the wires or the distributor cap than they will need to be replaced.

The distributor rotor always gets replaced when you replace the distributor cap.

You can also spray the coil with soapy water to see if it is leaking as well.

Oct 02, 2010 | 1995 Nissan Quest

2 Answers

Runs ruff changed mass air flow plug wires plugs


check for vacuum leaks, check distributor cap and rotor button, clean or replace as necessary. Use quality injector cleaner.

Feb 18, 2010 | 1993 Lincoln Mark VIII

3 Answers

Check engine light


A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

Jul 02, 2009 | 2004 Dodge Ram 1500

2 Answers

#4 cyl misfires/code 304


P-0304 indicates number 4 cylinder misfire. Are you using Toyota parts dept spark plugs? More often than not, non-toyota plugs make the v-6s run poor, right out of the box....
Try this:With the engine running, pull the connector wire off of the #4 injector. Note to see if there is any change with the idle quality. No change? You may have a bad injector.

Aug 12, 2008 | 1997 Toyota Tacoma

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