Question about 1997 Saturn SL

2 Answers

1997 Saturn sl2 Code P0304-IC module cam reference

Dealer quote appears high. Says I need to replace plugs, wires and 2 coils (module). Can figure out the plugs and wires, but the coilds? is this the ignition coil? Or the distributor cap?

Posted by on


2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,011 Answers

Yes it is the ignition coils . po304 is a miss fire on #4 cylinder.wires and plugs should fix the problem unless ignition coil is not firing. there are 2 coils they run 1&4 2 &3 cylinders.

Posted on Mar 12, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert that has over 500 points.


    An expert who has answered 200 questions.

  • Expert
  • 214 Answers

The Coil is the distributor cap.. Its a one piece deal that handles all 4 plugs. The firing Order on the coil/cap is 4-1-2-3,,, Looking from front to rear.. or left to right depending on how the coil is situated.. Hope this Helps

Posted on Mar 12, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

I got a 2001 olds silhouette, 3.4, with p1374. Checked ecm and replaced cps on the side of the block. ran great for about 4 miles, then it started stumbling and then stalling.

DTC P1374
The 3X reference signal is produced by the ignition control (IC) module. The IC module calculates the 3X reference signal by dividing the crankshaft position (CKP) sensor 7X pulses by 2 when the engine is running and when the CKP synchronizing pulses are being received. The powertrain control module (PCM) uses the 3X reference signal to calculate the engine RPM and the crankshaft position at engine speeds above 1600±150 RPM. The PCM also uses these pulses to initiate injector pulses. The PCM compares the 3X reference pulses to the 24X CKP pulses and the camshaft position (CMP) sensor pulses. If the PCM receives an incorrect number of pulses on the 3X circuit, a DTC P1374 will set and the PCM will use the 24X CKP reference circuit for fuel and ignition control. The engine will continue to start and run using only the 24X CKP and the camshaft position sensor signals.

Diagnostic Aids
• DTC P1374 can be caused by secondary components leaking high voltage into the IC module.
• Inspect for the following conditions:
- Incorrect harness routing near secondary ignition components
- Ignition coil arcing to wiring harness or IC module--Inspect the ignition coils for the following conditions:
• Cracks
• Carbon tracking
• Other signs of damage
- Ignition coil arcing to wiring harness or IC module--Inspect the ignition coils for the following conditions:
- Secondary ignition wires arcing to wiring harness
I would sugest you take your vehicle to a qualified repair shop an have it diagnosed , but i can tell that's not your way , is it . We diagnose not replace part's .
Replace the IC module. Refer to Ignition Control Module Replacement .
Did you complete the replacement?
Go to Step 11
Replace the PCM. Refer to Powertrain Control Module Replacement .
Did you complete the replacement?
Go to Step 11
If it starts an runs it's not the crank sensor behind the crankshaft pulley .

May 31, 2016 | 2001 Oldsmobile Silhouette


Saturn S series runs rough

It is very common on ALL SATURN S series vehicle for ignition module failure. Usually the symptons are running rough and possibly a check engine light with misfire codes-P0300,P0301,P0302,P0303,P0304.
Some people have attampted replacing plugs and wires,even coils and continually have the problem reoccuring. What happens is the ignition module bolts(x4) stretch out through time and corrosion builds up underneath the module causing incorrect spark displacement. In turn this damages the plug wires and even at times the plugs. What needs to be done is replacing plug wires, plugs if needed, the ignition module bolts(saturn dealer item only)and the ignition module-NOT JUST THE COILS.
This should fix your problem.

on Feb 18, 2010 | Saturn S-Series Cars & Trucks

1 Answer

2006 grand prix gxp 5.3. When you are driving normally it will miss from 50mph and up. When you punch it it doesn't miss a beat. I cleaned the maf sensor and air filter, Plugs were replaced.

It's probably a coil breaking down , have a scan tool hooked up an have misfires checked to see which cylinder is missing .
Ignition Coils
Each ignition coil has an ignition 1 voltage feed and a ground. The engine control module (ECM) supplies a low reference and an ignition control (IC) circuit. Each ignition coil contains a solid state driver module. The ECM will command the IC circuit ON, this allows the current to flow through the primary coil windings for the appropriate time or dwell. When the ECM commands the IC circuit OFF, this will interrupt current flow through the primary coil windings. The magnetic field created by the primary coil windings will collapse across the secondary coil windings, which induces a high voltage across the spark plug electrodes. The coils are current limited to prevent overloading if the IC current is held high too long. The spark plugs are connected to their respective coils by a short secondary wire. The spark plugs are tipped with iridium for long life and efficiency.
Drive it long enough like that (with it misfiring ) the check engine light will flash . This is to warn that a catalytic converter damaging event is taking place . This would also set a DTC - diagnostic trouble code
DTC Descriptors ?€¢
DTC P0300 Engine Misfire Detected

DTC P0301 Cylinder 1 Misfire Detected

DTC P0302 Cylinder 2 Misfire Detected

DTC P0303 Cylinder 3 Misfire Detected

DTC P0304 Cylinder 4 Misfire Detected

DTC P0305 Cylinder 5 Misfire Detected

DTC P0306 Cylinder 6 Misfire Detected

DTC P0307 Cylinder 7 Misfire Detected

DTC P0308 Cylinder 8 Misfire Detected

Apr 26, 2016 | Cars & Trucks

1 Answer

How to change cam shaft sensor on 1998 saturn sl1

There is not a cam sensor on the 1.9 sohc or dohc engine. The ignition module looks at the collapsing magnetic field of the ignition coil to determine cam reference.

Did you mean crank sensor?

Are you coming up with a code for the cam sensor?

If so the fix is usually to remove the coils and ignition module from the transmission. Clean the area they mount to with a scotchbrite pad until all the corrosion is removed. Reinstall the ignition module and coils using new bolts available from saturn/GM. Clear the code.

In some cases the ignition module or the coil or the ignition wires can also cause this code if they are bad.

Jul 01, 2011 | 1998 Saturn SL

1 Answer

My 98 saturn sl2 is misfiring in cylinders 1 and 2 with a psi of 135. I haven't noticed white smoke but when i am driving 60mph it is running at 3000 rpms and then when its hot it idles at 2000rpms. I...

No - I don't believe that if you have those codes that your problem would be a head gasket. Saturns are kind-of a wierd animals. They use spark duration on the ignition coils to determine camshaft position. They don't actually have a Camshaft Position Sensor like most cars. If you are getting a Camshaft Sensor code, the most likely problem is worn out spark plugs, bad spark plug wires, a bad ignition coil, or a bad ignition module. If the vehicle has not had a tune-up in a long time, I would try plugs and wires first. If this doesn't work, I would replace the ignition coils. This will usually fix it. I have had a couple howerver, that ended up with a bad ignition module (the thing that the coils mount on) but this is somewhat rare.

May 02, 2011 | 1997 Saturn SL

1 Answer

I have P0304 code, replaced the #4 spark plug which cleared problem in past, this code a appears very 3 months or so. "89 Ford Explorer "X" engine 180k miles. What should I look at next,...

so what is wrong with the plug when you replace it. is the plug wire OK? if the coil has weak output on that post for #4 it could cause that. I would replace the coil pack and plug wires, just to rule them out. With 180K I'm sure it needs the wires if they are original.

Dec 06, 2010 | 1996 Ford Explorer

1 Answer

92 sl2, shakes and looses power going up hills. feels like it is going to stall at a stop.

You probably need a new ignition coilpack and possibly plug wires. The coilpacks are common to fail. I worked for saturn for a couple of years and replaced at least one a week. you SHOULD replace both of them together but if money is tight and you can figure which one is bad then just replace the bad one. The napa part # isMPE IC59SB and they run about 48.00 each. The coils are mounted on the front of the engine and the plug wires are attached to them. There are two of them and they are mounted with 2-8mm bolts. The ignition module could also be bad but is usually accompanied with a po340 cam sensor code also

Jan 04, 2010 | 1992 Saturn SL2

1 Answer

'99 Saturn SC1 with intermittant check engine light P0341

a p0341 code mean cam reference performance, really it means you have a secondary ignition problem,,,,like a bad ignition module
a bad crank sensor
a high resistance spark plugs,do not use bosch platinum plugs in these cars
high resistance spark plug wires,,,i work at the dealer and the first thing we do is replace the spark plugs and wires if that dont work we replace the crank sensor,if thatdont work we reaplce the ignition mondule,and by then your fixed and you started with the cheapest items first,,,i would try plugs and wires and a crank sensor,,,,wires $50 plugs $14 crank sensor $37

Oct 23, 2009 | 1993 Saturn SC1

Not finding what you are looking for?
1997 Saturn SL Logo

686 people viewed this question

Ask a Question

Usually answered in minutes!

Top Saturn Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8826 Answers

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

Answer questions

Manuals & User Guides