Question about 1990 Jeep Wrangler

1 Answer

88 grand wagoneer wont run

My 5.9 will not start. I think its the ignition module, coil is new, strong battery, cranks over very well. the spark is very weak/ none at all. when i let go of the key while starting the motor it tries to start! Could this be a ground problem or is the module or computer bad? Appreciate any advice you may have.

Posted by on

  • Rob Houg
    Rob Houg May 11, 2010

    This could be a timing issue

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 33 Answers

It sounds like ignition switch is going bad." when i let go of the key while starting the motor it tries to start! "

Posted on Jan 06, 2009

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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Car cranks but wont start? No spark. Changed ecm relay no help. Ignition harness is good. No fault codes. Battery is good. changed ignition relay, no help. I think its the ECM but need more info to spend...


Yes, the ECM is the last thing to replace after all other possibilities. No spark could be bad ignition coil, bad Ignition Control Module (controls the coil circuits for spark), bad plug wires, the crank and cam sensors (for ECM to determine spark timing).

Check the ICM -it can be tested at a parts store. If good, check the crank sensor.

Mar 16, 2015 | Cars & Trucks

1 Answer

1989 jeep grand wagoneer 360 how do i test bad crankshaft position sensor


double posted, now with 360, 5.9L V8 fact.
great.
and has no such sensor.
its a CARB car
with ICM , spark magic box. , NO ECU /PCM brain in car
there for no CKP sensors.. sorry?

if you dont know what is there, photo it and post it
so others can see what is missing or wrong, from factory day 1 build.

i google for you
rockauto shows no such part in 360
alldata.com same
hell. even the 90s the same.
see it here.
all schematics

if engine wont start. even with test fuel, check spark
see the spark section below, under ignition.

http://oljeep.com/gw/elec/GW_wiring-1990.html

the distributor has cam sensor. not crank.
it called today, CMP, cam sensor
this sensor sends signals to the ICM the ICM then makes spark
buy driving the coil,
the CMP is more like Points, simulation, and lasts near for ever.

the 89 4L has a CKP (crank sensor) and is know to fail on brand new cars. (you need to tune it to make work , back in 88/89) at flywheel.
ask me how in know./././??


360 spark
CMP >>>>> ICM>>>> COIL>>> Dizzy cap>>> spark plugs.
this is the chain of events.
the DIZZY does the ADVANCING with ICM. totally. on this car.

Sep 09, 2014 | 1989 Jeep Grand Wagoneer

1 Answer

I have 88 chevrolet corsica. No spark at the plug wire put new coils / module on still no spark can the crankshaft position sensor stop it from getting spark and i checked all te fuses Bill


Yes the cam sensor could fail to send a signal to the ignition module, but a V6 engine does not use a cam sensor.
It does use a crank sensor.
You would need to know that the ignition module and coils have battery voltage, then you would need a book to give you the test procedures for the computer and crank sensor.

Mar 17, 2013 | 1988 Chevrolet Corsica

1 Answer

95 olds royale 88 hesitated on pull out when accellerated, then jerked hard drove little rough.


Could be bad coils,fuel filter and tune up.This is basic maintenance.I today change spark plugs on 3.8 .One was crack and some worn out.190000 km.

Mar 17, 2013 | 1995 Oldsmobile 88

2 Answers

It turns but it wont start,it has gas and power


Pull off the coil ignition cable at the distributor and check for spark coming out of coil when cranking engine over. Use a heavy rag or glove to hold the wire 1/4 inch from a metal ground. Should see a strong blue spark when cranking to verify ignition is good. If no spark, check for battery voltage to coil on the coil primary. If you have current to the coil, suspect a bad coil, ignition module, crank position sensor, or cam position sensor, or pcm. The coil, ignition module, and sensors can be tested before replacing.

Jan 29, 2013 | Cars & Trucks

1 Answer

Wont start, engine turns strong, new battery, new plug wires?? Thinking coils are bad???


take off one plug wire from one of the coils, turn starter and see if a spark jumps, you will be able to hear the sparks if you are by the door turning the key. if you get no sparks the ignition module is bad, if you do get spark try same test for remaining plug wires one at a time. you may have a bad coil

Sep 23, 2011 | 1998 Pontiac Grand Prix

1 Answer

The Jeep has set for about 6 months. A week ago: battery dead, jumped it but would not start. I replaced the coil, jumped it and it started instantly and ran better than it has in years. Yesterday, I...


Check to see if you have spark at the coil. If you have spark at the coil and no spark at the plug, you probably have a bad distributor cap and/or rotor.

If there is no spark at the coil, you need to find out if there is voltage present at the B+ terminal of the coil.
No B+ could be anything from a bad ASD relay to a broken wire or burned fusible link.

If B+ voltage is present at the coil, the "NO-SPARK" condition could be caused by anything from a bad Crankshaft Position Sensor (CKP) to a bad Ignition Control Module (ICM) To a bad Electronic Control Unit ((ECU) - AKA Engine Control Module)

Nov 02, 2009 | 1989 Jeep Grand Wagoneer

2 Answers

1988 Subaru GL Wagon Cranks but won't start


Before you change ECM, You must make sure you have spark from plugs..If not pull the distributer it tends to shatter internally which the eye cannot tell unless opened properly.

Jun 16, 2009 | 1988 Subaru GL-10

2 Answers

Weak spark + 1988 ford bronco


check the voltage of the b+ terminal of the ignition coil (primary side) with a cheap multimeter while cranking. low voltage to the primary will cause low voltage on the secondary. also recheck all ground paths from the ignition module. ensure good connection from coil to module. note: new parts are not "known good parts" until it runs.--> IG.MOD.

Dec 17, 2008 | 1994 Ford Bronco

Not finding what you are looking for?
1990 Jeep Wrangler Logo

Related Topics:

125 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

63456 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21981 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...