Question about 2001 Jeep Grand Cherokee

1 Answer

I remove old spark plugs from my Mom car. And put in new autolite spark plugs AP985, and set gaps to.035. And the car is running rough.

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 160 Answers

Two possibilities to start with;
A bad plug (it happens now and then) or manufacturer defect, which you can trace with one of the old plugs by swapping one-by-one...or
A damaged plug wire...This is easy to do when pulling the boots from the old plugs.
If one or more of the boots was harder to remove than the rest, then start with those lines...the small clip inside the boot can be pulled loose and this poor connection causes a gap that will show up as a miss in the engine.
With the engine off, press each wire (not too hard, but firmly) into the boot and try to start it.
If it's still rough, then use a continuity tester on each line to find the open line.
* Remove & Test each line one at a time so you can replace each where it belongs.

Another less-possible problem: One of the plug wires went to the wrong plug...If you replaced one plug at a time then this isn't possible, but it's a common novice mistake.and easy to fix.
There should be a "Firing Order" sticker near the radiator, and again in the owner's manual, showing the wiring diagram for the distributor wires.

***Don't forget to VOTE for the guys who take an interest in helping!

Posted on Jun 04, 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

Went to change spark plugs and when i put the new ones in the car run's rough. put the old one's back in runs fine. did this twice .


Did you check specs to set the gap on the plugs to the proper setting for you vehicle They do not come set for all vehicles Some are at .030 and can be as high as .060

Nov 24, 2015 | Cars & Trucks

1 Answer

2006 ford five hundred with P0301 code. Idling rough and has loss of power. New spark plugs (Autolite platinum), coils, EGR. What next? About 1500 miles from home, tools, and mechanic.


cylinder 1 misfire --pull plug and look at it for proper gap- damaged plug -was old plug damaged --check coil for proper working order wire hooked up correctly-wire connection --injector working properly

Aug 02, 2015 | Ford Cars & Trucks

1 Answer

What is the gap for Autolite spark plugs (2245), for Jeep Mutt M151A2?


.035 should do it ! Pretty standard & I don't believe there is any difference at all between point and electronic ignitions.

Mar 09, 2015 | Jeep Cars & Trucks

1 Answer

What is the spark plug gap in a 1991 dodge caravan 2.5 liter useing autolite spark pluges


Throw away the auto liters and get yourself four champion spark plugs. Champions work in chryslers, auto lites/motorcraft work in fords, NGk for Japanese, ac delco for GM's, Bosch for European.

Follow ow those rules and you will likely never have a drivability issue caused buy the wrong spark plug.

Set them to .035" and you should be good to go.

Sep 21, 2014 | 1991 Dodge Caravan

1 Answer

What are the spark plugs for my car, 1993 Chevrolet caprice classic


Autolite - #25
Champion - RV15YC4
Denso - T20PR-U

.035 gap

Jan 22, 2010 | 1993 Chevrolet Caprice

1 Answer

My 89 honda civic has been running rough


No it has not been overheating or losing coolant at all it just has been running rough and poorly (loud) it was not smoking till he took out the old spark plug and put in the new one he said it was smoking out all that had been backed up into the cylinder due to non working spark plugs (there was oil on the spark plug)

Nov 12, 2008 | 1989 Honda Civic

Not finding what you are looking for?
2001 Jeep Grand Cherokee Logo

101 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

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

Answer questions

Manuals & User Guides

Loading...