Question about 1993 Toyota 4Runner

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Miss fires intermittently especially when hot

I have a 1993 4runner which miss fires intermittently espcially after a long run. I've changed spark plugs & wires, distributor cap, and rotor. But the problem apparently disappars then return. It sometimes miss fires to the point where it stall when idling.

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  • Anonymous Mar 29, 2014

    not easy to start idle is awful

  • Anonymous Mar 31, 2014

    #4 cylinder not firing. Replaced all plugs and wires, distributor, and rotor. Still not firing.

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  • Master
  • 375 Answers

Get the codes read. Auto Zone will check your codes for FREE.

Posted on Aug 03, 2008

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1 Answer

Miss firing at random


misfires are more that often from faulty injectors and not spark related
check fuel pressure and injector condition
use fuel conditioner in the tank

Nov 07, 2015 | Cars & Trucks

3 Answers

Ignition mystery! 1994 GMC Suburban 2500 5.7 mtr. No spark to spark plugs. Have spark from coil to distributor. Have changed coil wire, cap, rotor, ignition module, and coil. have 12.5 volts going to...


I guess you could have the ignition analyzed on an oscilloscope. Maybe a tech could see something then.
I always heard the only gap was the spark plug gap-the rotor has no gap-are you sure you got the correct rotor? And does it touch the top distributor cap coil wire tower?

Let us know. It is a mystery worthy of a solution.

Sep 21, 2013 | Chevrolet Suburban 2500 Cars & Trucks

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1.3 1998 ford fiesta runs fine on tick over but missfires when under accelaration


usually a secondary ignition problem(coil pack, spark plug cables).

Apr 13, 2013 | Cars & Trucks

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I have a 1993 chev pick-up v6 4.3, i just installed new spark plugs,new plug wires, distributor cap and rotor button.All plug wires are back in the right position,and i used the firing order 1-6-5-4-3-2...


This diagram is for 1998-1995 Chevy 6 cylinder 4.3L engines.
Your got the firing order exactly correct, at 1-6-5-4-3-2, but here's the thing to double-check:
The distributor rotation is clockwise (note badly rendered arrow in picture).



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Since you probably got everything right, then you're left with really unusual/rare causes of
failure of the ignition system:
(a) rotor button misaligned/failing to make contact?
(b) rotor button not pressed onto distributor shaft far enough therefore failing to provide correct
proximity to distributor cap contacts when coil fires
(c) coil wire or contact loose/disconnected - press coil wire firmly down into distributor cap.
(d) distributor shaft of other damage caused during installation of rotor.
(e) spark plug wires defective from factory
(f) spark plugs defective from factory
(g) battery low - may need a charge to start
(h) ICM (ignition control module) failure - hook up your HEI (high energy ignition) tester, and
watch the quality of the spark on each cylinder.
(i) fuel problem? If spark is being properly delivered, its gotta be a fuel problem...
(j) distributor cap not screwed down flush to top of distributor? maybe just on one side?

Inspect the inside of the distributor cap - if there are lots of little metal bits all over the inside
of the distributor cap, then you know you have a misalignment of some type in there, and the
rotor and cap are destroying each other. normal operation will throw a quota of spark-ed off
metal bits inside the distributor cap, but since your cap is brand new, your attempts to start
the engine should have rotated the distributor so few times, you should see no metal debris.

Inspect the distributor cap contacts to see if any spark marks are more of less in the middle
of the cap's proper "contact zone". If not, you've diagnosed an internal misalignment, which
you know how to correct.

Sep 14, 2011 | Chevrolet 1500 Cars & Trucks

1 Answer

I have a 98 honda accord 5 spd it has a 4cyl motor vtech i just need to know how to fix a miss fire in cylinder 2 and wich one is cylinder 2


Cylinder #2 is the the second spark plug counting from the right to left.
EX.Below are spark plug on engine
engine
-------------------------------
' (oil cap) '
' (4) (3) (2) (1) '
'_________________'

Your misfire can be cause by couple of things but the cheapest way that you can try to fix your car is to do a tune up by replacing:
1)all spark plugs
2)do a oil change
3)spark plug wires
3)distributor cap and rotor

note misfire can be cause by:
1.bad gas
2.spark plug and/or wire
3.distributor cap and/or rotor
4.valve adjustment
5.injector
6.off timing
7.ECM
8.bad wiring(power, ground or feed line)

Jul 08, 2011 | 1998 Honda Accord

1 Answer

Car intermittantly miss firing, I think i GOT some bad gas. I used fuel injection cleaner,, miss firing is slightly better.


You will likely need new spark plugs and ignition wires or coils, depending which system is in the car.

Jun 11, 2011 | 2000 Lincoln LS

1 Answer

Installed new engine now wont fire from distributor to spark plugs.


If you've got spark from the coil but not at the spark plugs, it can only be 1 of 3 things.
  • Bad spark plugs or plugs not gapped properly.
  • Bad spark plug wires.
  • Bad distributor cap and rotor. This is pretty easy to check. Open up the cap and look at the points on the underside of the cap and also the point on the rotor. If they look corroded or worn, then you should replace them.

Good Luck!
~Brandon

May 29, 2011 | 1994 Nissan Pickup

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