Question about 1998 Toyota 4Runner

1 Answer

Car idles and runs ruff until 2500 rpm then smoothes out. Scanner says problem with cylinders 6 & 3. replaced coil but problem still persists.

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 4,102 Answers

Hi the problem could be with the leads going to the spark plugs, it could also be spark plug faults, so as you have changed the coil it may be worth getting a set of plugs and leads and replace them to rule out any of them being at fault, then the next thing to do would be to go out and buy a decent fuel line cleaner.

Make sure you buy correct type ie petrol or diesel then follow instructions on back of bottle, how ever it will say pour this into a full tank of fuel, now dont do this pour it into half a tank of fuel this will make it work a lot quicker and you will then get better results.

once you have poured it into the tank do the following.
1, drive steady for 15 to 20 min
2 then drive a bit harder such as pulling away faster and taking the revs up higher
3 then drive normal for the last 15 min doing this will ensure all fuel lines are clean and also injectors are cleaned, this will also remove any carbon build up on the valves so using this alone could solve your problem.

it just sounds like you need a good service so have a look at plugs and leads then try the fuel cleaner, you can buy the fuel cleaner from most filling stations and car spares shops a good brand to buy is called Red X

let me know how you get on or if you need further assistance ok

Posted on Jul 09, 2010

Ad

1 Suggested Answer

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

Idle marks 1200rpm but sounds to low


Could be the tach isn't accurate at low rpm, that isn't unusual. Try connecting an external tach for testing.

Jun 15, 2015 | Cars & Trucks

1 Answer

Engine misfireunder load


I would check the coils...In have seen some fail at under 80k miles but mostly you can get well over 100k miles... I do not know if you have a great scanner or not, but what I do is use a scanner and run a power balance test and this graphs the cylinders performance and coil output.Also you can try cranking the car and let it get to operating temp,then go to each coil and disconnect it,you should have a rpm drop,if you do not get the rpm drop then that coil is bad.Last if you can test the resistance of the coil with a multimeter...Make sure you have the car scanned with a good scanner 1st to point you in the right direction.

Apr 15, 2014 | 2008 BMW 328xi

1 Answer

Misfire p0303


Check wiring harness around and including plug to the coil pack. Also check fuel pressure with vehicle running. I'm not sure of the specs but, Iit should be around 35 to 40 psi. at idle, and 50 to 75 at higher RPM's. I've seen Fords run with a bad fuel pump and demonstrate these exact symptoms

Mar 06, 2014 | Ford Cars & Trucks

1 Answer

I have a audi a4 2.0 computer came up with cylinder 4 misfire.swapped coil pack 3 and 4 still same problem. so that eliminates coil pack problem. when you rev the engine to 3000 rpm it clears then when the...


It's the plug wires, I would peek at the engine at night when it is dark,and running to see if you can see a spark jumping across there. I'm surprised the code didn't say plug wires. Hope this helps.

Sep 05, 2010 | 1999 Audi A4

1 Answer

Running roug at low idle, smooths out at 2500 rpms


change plug and wire if its been a while most cars have 90000 miles platinum plugs in them.but the wires wear before plugs.so change plugs and wires.+clean fuel injectors .change fuel filter and air filter.if car still run rough your idling to low.have idling check .

Jun 06, 2009 | 2001 Oldsmobile Alero

1 Answer

Lite tapping in engine,very ruff idle,stops when idled up and runs smooth


ruff idle may b idle controll senc. ----tapping may be plugs-- wires, and or gas try 91 oct gas next 3 tanks and see thats the cheeepset place to start

May 28, 2009 | 1998 Ford Explorer

1 Answer

98 chev 5.7 #3and#6 clys are missing at ilde to about 2500 rpm


I would test for a leaking intake manifold gasket. WITH A WATER SPRAYER , and the engine running at operating temps and at idle, spray some water where the intake meets the cylinder head. If you hear a little SUCKING SOUND, and the engine smooths out temporarily, thats it Hope this helps

Apr 12, 2009 | 1998 Chevrolet K2500

Not finding what you are looking for?
1998 Toyota 4Runner Logo

68 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

76673 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8531 Answers

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

Answer questions

Manuals & User Guides

Loading...