Question about Mitsubishi 3000GT

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Hi im louie i have a 3000gt 1992 was sitting 4 years now it starts but lost spark in 1 coil i checked all 3 coils and notice the test light has pulse in 2 coils and 1 coil the test light is on steady can you help me out?

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"Ignition Module" you referred as the PTU (Power Transistor Unit). You might want to replace that - This might be the issue where several cylinders wouldn't fire (verified by pulling plugs - they were wet with gas).

If PTU (located just below the Coil Packs) will be replaced the problem might went away completely.

Posted on Sep 11, 2009

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3 Answers

It is only firing on three coils it is like no power going to #3 coil what could be wrong? Wiring?


VALVE COVERS CAN LEAK INTO THE COIL WELLS AND SHORT OUT THE COIL. BUY A NEW COIL AND INSURE THAT THE PLUG IS GOOD AND NO OIL IS IN THE COIL WELL.

Apr 03, 2015 | 2007 Ford Focus 2.0

2 Answers

Jeff,this is a 2.4 quad 4 I checked injector pulse at the connector with a nod light.all have pulse while cranking.did not check while running.


It sounds like a mechanical problem to me , 225 psi compression seams a bit high, normally 150 to 180 . Couldn't be coils , cylinders 1 and 4, and 2 and 3. are companion cylinders share same coil. ! Do you have a fuel pressure gauge ? Do a fuel injector balance test.You don't have plug wires , you have the ignition control module an coils in what GM calls a ignition cassette , sits on top of valve cover ? plugs in center of head ?Check out some of this guys videos . ask him questions , he's a automotive repair tech. plus teacher ! he has a lot of different video on misfire detection .
How to test fuel pressure injector pulse and spark with basic tools

Jan 24, 2015 | 2001 Chevrolet Cavalier

1 Answer

Car cranks but will not start


This could go several ways #1 engine mechanical check cranking compression should have 125 psi or greater in all cylinders if low but even squirt oil (1/2 oz.) in 1 cylinder and retest goes higher then rings sealing has been lost. if uneven check timing belt for jumped or misalignment. #2 electrical does it have electrical spark to plugs crank engine with a spark plug connected to spark plug wire laying plug on engine can you see spark? No test ignition coil wires with a logic probe both terminals will be red with key on one will flash red/green when engine cranking does not the primary ignition needs repair Ignition module? or pick-up coil/ crank sensor. #3 fuel system pressure and injection pulse. injection pulse can be tested with logic probe DONOT USE A TEST LIGHT YOU CAN RUIN THE ECU .

Mar 21, 2014 | 1998 Mazda 626

1 Answer

I have a 1990 nissan sentra that will crank but wont start no fire from coil


Check for power on the + side of the coil with the key on Then using a test light check for a "pulse" on the negative side of the coil by attaching the clamp side of the test light to ground and the point to the negative side of the coil while cranking. If there is no pulse then it most likely needs a distributor. If there is a pulse but no spark then it needs a coil.

Oct 11, 2013 | Cars & Trucks

1 Answer

2006 Suzuki forenza no fire from coil pack


what country? this is the WWW, post country for better answers.......!
Only a scope can see the fast 5mS signals to the coil.
so its either the coil pack or the ECU blown. (wires are always suspect)
you never said , all 4 are dead, or 1 or 2, and how many packs.
some non usa cars have wasted (2pak) spark , not 4 COPS.
state what cylinders have spark and which don't.
there are only 2 ways to fix cars.
1: guess and swap parts
2: use tools. my guess is you dont have them.
some coil packs are active (ignitor inside) others just a coil.
you can test the restance of the coils, with a DMM , ohm meter.
if active you cant.
the fsm covers this on all cars.
https://suzukipitstopplus.com/category/3-suzuki-service-manuals.aspx
the 2006 Forenza as delivered to USA has.....
has a large single, dual wasted spark coil pack. (brick)
it does in fact have , internal ignitor drivers. inside. so can not be tested
with and ohm meter on the primary side. but can be on the secondary
you do know how to test wasted spark , right, All spark plugs must be
attached and grounded for the coil to work,
1and 4 are shared.
2 and 3 are shared.
so to test , you must keep the spark plugs (both or all 4 is best)
attached and the shells of spark plugs grounded.
there is a fuse that powers the coil pack. (usa)
the fuel pump relay sends power to the coil pack.
so of that is dead,so will be the pack. (im reading FSM as it type)
get an FSM.
pin 2 on coil pack is power. 12v.
pin 1,is spark 1&4 drive (fast ECU pulse)
pin 3 is 2&3 coil drive. (scope can see it)

recap, are you using the correct wasted spark testing method.
and are all 4 spark plugs dead.?

Feb 18, 2013 | Suzuki Forenza Cars & Trucks

1 Answer

I have replaced the coil pack on my 2002 ford taurus with the 3.0 24 valve engine. I have no spark to cyliders 3 and 4. I have also replaced the electical connector to the coil pack as well. All 4 wires...


All 4 wires have power and the yellow and white and the yellow and black pulse with the test light, the yellow and red and the solid red wire have a steady light with no pulse. The PCM - engine computer is no good , driver (transistor's) in side turn the coil on an off . Burnt transistors .

Mar 30, 2017 | 2002 Ford Taurus

1 Answer

I have a 92 corsica 3.1 all of a sudden it wont start. im getting a small spark from 4 and 6 but nothing from 2. any ideas? abot 2 years ago had to chg coil packs and icm. could either have fouled out...


if the battery voltage is not at full voltage this can cause a poor spark.this needs to be checked first as without proper voltage all testing is not accurate,i`m guessing that you have no check engine light on the dash when it was running so this eliminates a possible code set in the computer.if you check the connections at the icm and make sure they are clean as they get alot of debris thrown at them aver the year because of were they are mounted.were these new components when you changed them or used,this is a common problem with this system.you don`t say if cylinders 1-3-5 have any spark of any kind.it sounds like you may have a bad icm as you say cylinders 4-6 are weak spark and nothing from #2.without checking this out it sounds as the crank and cam sensor is working or you wouldn`t have any kind of spark.this narrows it down to icm or poor coils however it is very rare that 3 coils would all of a sudden go bad,again this indicates a bad icm

Mar 09, 2011 | 1992 Chevrolet Corsica

1 Answer

Car works fine for 15- 20 minuts then stalls, try


Are you able to check the ECU for faults. On this car there is an access to the ECU. With the use of an analog multi-meter you can check the ECU for faults; gives you signals like a morse code using dots and dashes with the meter's needle Doing this could lead you right to the problem. With no spark could be the No. 1 Cylinder Top Dead Center is failing; this is within the distributor on the SOHC engine (it uses light pulses thru a rotating disc to establish spark) A long shot being the wire harness. Our son has 93 Stealth with same engine he was having runability problems. It would idle fine and even rev fine in "Park" Once placed in gear it would seemingly sputter and die out. By a stroke of luck one night (no lights on) I saw a small blue spark coming from the wiring to / from the coil. On investigation found the the coil bracket had rubbed thru the insulation on wiring. When in Park it was no problem but once placed in gear the engine would slightly torque and push the bracket in to the wiring causing a short and the engine to die. Any chance you have or can use a meter? I can get you the codes.

Best regards,
Tom

Jun 30, 2010 | 1992 Mitsubishi 3000GT

1 Answer

Ok i had a p0302 and then i changed plug wires coil packs the icm injectors camshaft sensor and now i can a p0301 code.. and when i clear the code it will come back with the same code or else a p0300.. im...


1. Freeze Powertrain Control Module (PCM) and see if the problem can be duplicated.

2. Wiggle tug test wiring for #2 injector.

3. Scope the #2 injector for a glitch when the misfire happens. 1. Test for the Exhaust Gas Recirculation (EGR)/coolant adapter gasket leaking EGR gases past the gasket.

2. Connect a vacuum pump to the MAP sensor, block the vacuum source, reset fuel trims, start the engine and add typical vacuum to the MAP sensor and check operation.

3. Test the spark output with 2 High Energy Ignition (HEI) testers, at 25 KV air gap each, at the spark plug wires to ground at wires 2 and 3, then 1 and 4 at cranking speed and engine running.

4. Test the fuel injector pulse width at the injectors compared to the scanner data.

5. Disconnect the O2 sensor, reset the fuel trims, test the system operation in open loop, test injector pulse width. Compare to the closed loop operation injector pulse width and engine operation.

6. Test the Powertrain Control Module (PCM) powers and grounds during the problem.

Oct 13, 2009 | 1996 Chevrolet Cavalier

1 Answer

1992 plymouth vayager no spark from coil


Voltage is applied across the coil primary only in brief pulses too short to light the typical troubleshooting light. The 2 seconds you are seeing it light is just before the coil is hit with pulses. After that brief span, voltage is applied and removed too quickly to detect that with a light.
 If you are getting no spark, it is because this rapid application and removal of the voltage isn't happening at all. This can be caused by a failed ignition module or ECU. In your engine, there may also be a pulse transformer in the distributor that supplies signal to the coil instead of the pulse coming from the ECU. Pulse coils will normally measure from 6,000-12,000 ohms if they are still OK.  

Jan 10, 2009 | 1992 Plymouth Voyager

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