Question about Cars & Trucks

1 Answer

4.6 triton cylinder 3 and cylinder5 misfire

Truck was running fine then all the sudden it started knocking and every now and then it would bang. it started to misfire, i replaced all plugs and plug wires, replaced 4 tower coil, and put new injectors in it. it has 120 lbs of compression on both cylinders and has 33 lbs of fuel pressure while engine is running. the injectors pulse and the plugs fire outside the motor, but if you pull plug wire off of cylinder 3 or 5 nothing happens. i also sprayed carb cleaner around intake and all hoses with no effect. anyone know a solution i have not tried?

Posted by Anonymous on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Welcome Back:

    Visited the website for 2 consecutive days.

  • Contributor
  • 25 Answers

I would bet my bottom dollar you have an intake manifold gasket is leaking. My 5.4 ford manifold had to be replaced due to being cracked because they are plastic, common problem..

Posted on May 02, 2017

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

SOURCE: Have a 1999 Toyota Tacoma with a 3.4. Vehiclw was

Most likely I a would suspect the fuel rail had moisture in it. If you checked emissions it would most likely show no HC and alot of 02 and no CO. If it does show alot of HC then I would suspect sticking valves intermittantly . The pinging really points to no fuel issue tho. If you pull the injector connector off and no change then I would remove the fuel rail and inspect. Also make sure the wires are in the correct locations. It easy to get them wrong.

Posted on Sep 03, 2009

SOURCE: My 1986 Nissan 300zx non-turbo was running fine,

It sounds like the number 2 injector is hung open.

It will dump fuel and cause all sorts off issues with the ECU.

You should ohm that injector and compare it with the others to see if it is wildly different. If so, change it out and retest.

Posted on Jun 27, 2010

duane_wong
  • 6826 Answers

SOURCE: my truck has a #4

Try to check that the fuel injector, using a fuel injector tester, is getting an electrical pulse as indicated by the tester lighting up and blinking periodically.

Also, one can check the injector by putting a stethoscope on the injector and listening for a loud click.

Also, check that antifreeze is not leaking into the cylinder causing the plugs not to fire. How did the plug look that was replaced? It should have had a light brown dry appearance if normal.

Posted on Oct 07, 2010

Testimonial: "answer was very timely, and definately gave a good NEW direction to look. Thanks."

  • 5470 Answers

SOURCE: Hi I have a 2004 Ford Explorer 6 cylinder 4.0

Hello, It seems you have done a lot in trying to fix this. My first idea is that it is a pickup sensor for the camshaft or crankshaft. The firing order of your engine is 1 4 2 5 3 6. You are having misfires in 3 consecutive cylinders 4,2,5. This would seem to mean that the distance to trigger the firing is greater on 4,2,and 5 than on the other 3 cylinders. This can mean you have a lopsided situation on either the crank pulley or cam. You should see if the crank pulley is tight as well as the cam or if you can better adjust the 2 sensors.

Next, the Intake system can have a bad gasket. Use a water spray bottle and with the engine running, put a mist on the Intake gasket. If you have a change in RPM, then you have found a leak. This would explain why the same 3 cylinders are always misfiring. Some of the V-6 models used sandwiched 2 piece manifolds and the gasket between the upper and lower half would deteriorate over time. Some engines used "runners" between the Intake manifold and heads which could gum up over time. Just a cleaning operation if you are putting on a new Intake gasket anyway.

I hope my solution is very helpful and would like to know what you finally found as the problem.

Posted on Aug 03, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2001 5.4l Triton. Why is there a misfire on cylinder 4?


Bad coil pack on 5.4liter F150's? and do they all need to be ...

www.lawnsite.com > ... > Trucks and Trailers
7 posts - ‎5 authors 01-02-2009, 12:11 PM ... so my 2000 F150 v8 5.4 triton is a great truck as I think anyone with one with one will agree. The only recurring problem seems to be the coil packs will go bad all of sudden, causing misfiring and a very bumpy ride. ... happened a few years ago, I replaced them all and the truck was good for 3 years.

Aug 12, 2015 | Ford F-150 Cars & Trucks

1 Answer

Codes p0171 p0303 p0325 car missing


p0171 = fuel system too lean, this means vacuum leak or faulty oxygen sensor

p0303 = cylinder 3 misfire

p0325 = knock sensor malfunction.

p0303 and p0325 - i can see these working together, if a cylinder misfires, it will cause the knock sensor to trip. I would lean towards the coil and or ignition module, along with a faulty oxygen sensor.

Dec 08, 2013 | 2000 Nissan Altima

1 Answer

2001 Passat 1.8 Turbo engine sputtering and hesitating


My car was doing this and I had to get all new coil packs... Mine were replaced under recall at the dealership at no cost. If you take each code and google it, or even check a VW forum, I'm sure the members there can provide a lot more thorough information...... I have a 2001.5 Passat myself and when one thing goes out they all follow suit. I will help with some research for you and post back...... But I'd check the coil packs that sit atop the spark plugs.

Feb 05, 2013 | 2001 Volkswagen Passat

1 Answer

My Nissan yesterday started idling terribly and when I was driving it was shaking and vibrating so bad it felt like I was driving with square tires.


I doubt the EVAP problem is causing the rough running. The knock sensor code means the knock sensor noted a severe vibration. The cylinder 4 code could mean the miss has become bad enough to trigger a code for one cylinder.
I would look at the injectors and for a vac leak. And the spark plugs can be firing in air but not inside the cylinders under pressure.

Sep 10, 2012 | Nissan Cars & Trucks

1 Answer

Codes:p1346/p1349/p1354/p0446/p0300/p0301/p0303/p0305/p0307/ p0430/car runs rough when idling/lexus gs 400 1998


P0301 Cylinder No. 1 Misfire Detected
P0302 Cylinder No. 2 Misfire Detected
P0303 Cylinder No. 3 Misfire Detected
P0304 Cylinder No. 4 Misfire Detected
P0305 Cylinder No. 5 Misfire Detected
P0306 Cylinder No. 6 Misfire Detected
P1346 Variable Valve Timing (VVT) Circuit Range/Performance Fault
P1349 Variable Valve Timing (VVT) System Malfunction
P0330 Knock Sensor
P0446 EVAP Vent Control Fault
P0430 Catalyst System

Stop driving immediately.....

You defiantly skipped on your timing........

Feb 14, 2011 | 1998 Lexus Gs 400

1 Answer

Engine started knocking during exceleration. Sometimes at idle. Check engine is on and says misfire in cylinder 3. plugs and coil is fine. cant figure it out. Any sugestions?


Probably the Crank Position sensor. If that is sending the wrong signal then it will try and fire the cylinder at the wrong time.

Dec 27, 2010 | 2007 Chrysler Sebring Sedan

1 Answer

Codes are reading cylinder misfire and replaced


does the check engine light come on b 4 or after

Jan 27, 2010 | 1999 Oldsmobile Intrigue

2 Answers

Intermittant p0302,p0305 codes misfires


A code P0305 may mean that one or more of the following has happened:
· Faulty spark plug or wire
· Faulty coil (pack)
· Faulty oxygen sensor (s)
· Faulty fuel injector
· Burned exhaust valve
· Faulty catalytic converter(s)
· Running out of fuel
· Poor compression
· Defective computer

If there are symptoms such as 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 wires , distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad, especially given you had water issues. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced.
I've also heard in other cases the problems were faulty fuel injectors.

Nov 10, 2009 | 1996 Oldsmobile Cutlass Ciera

1 Answer

My saxo 16 v vts suddenly started to idle


check your spark plugs/wires and distributor cap sounds like a cylinder misfire

Nov 03, 2009 | 2005 Peugeot 405

2 Answers

Cylinder three misfire? im driving then all the sudden my truck starts making this funny nose i get home and check the code p0303 and it says "Cylinder 3 Misfire Detected" how do i fix this?


I had the same problem but on cylinder 8. The solution was that you need to replace the coil pack on that cylinder and then it will run fine.

Jul 02, 2009 | 1998 Ford Expedition

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

33 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75005 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...