Question about 2001 Saturn SC

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My saturn sc2 2001 run on 3 cylender when she want. i have changed my coil pack wire spark and spark plug. the computer can cause de problem?

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The fuel injectors can be the cause.first you must isolate which cylinder is shutting down. When the engine is missing pull plug wires one at a time to determine which one does not slow or make engine run worse. CAUTION: use rubber handle pliers or rubber glove to pull wires off plugs.

Posted on Nov 28, 2010

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2 Answers

Jeep 3.7 cylenders 2 & 4 not firing


3.7 V6, mileage?

most likely the HV wires bad.

then bad coil pack.

did you check spark directly at the coil pack?

i use 2 known good HV wires to do that and 2 good test spark plugs.

both plugs grounded to engine (shell)

that is how you test any wasted spark coil pack. 3 coil pack.

if that fails the FSM shows, unplugging it and check the coil resistances. if wrong the pack is bad,

keep in mind the res. can read ok and coil be bad ,due to internal insulation break down (internal shorts)

if thats ok. the resistance , make sure the wires are not (primary)

to the coil (the low voltage connnector)

if that is ok, its mostly likely a bad coil, (pray not bad PCM)

if tool-less? start with cheap parts , work to expensive. (guessing)





now wasted spark 101.

if one line opens , both spark plugs die. no spark

the wasted spark is wired in SERIES. ( like Christmas lights)

the magic cuts cost of 6 coil\'s.

so if the HV wires are say, cheap , carbon wire and open

you lose, both spark plugs. use MAG wire and end this issues.

get some nice NGK mag wire or Bosch Mag wires.

you can see i hate carbon wire. for good causes.

(carbon string wire)

mag wires is real wire that is coil spun and is inductive. it

has the correct impedance but is not a resistor its and inductor.

and lasts the longest , and worth every penny.

Mar 29, 2014 | 2006 Jeep Liberty

1 Answer

# 7 cylender does not fire... changed plugs and wires and nothing


Keep in mind that a code P0307 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* Defective computer

Possible Solutions:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Check, test it and keep us updated.

Mar 31, 2011 | GMC Yukon Cars & Trucks

3 Answers

Is p0304 code basically a tune up?


P0304 stands for #3 cylender is misfireing.
Cuases can be.
1. Bad spark plud wirers
2.badspark plug
3.vacuum leak
4. a leaking intake manifold
5.headgasket leak
6. bad cylender rings
7.bad coil
hope this helps give feedback Fixya

Feb 06, 2011 | Ford Taurus Cars & Trucks

1 Answer

Spark Plug Wire Diagram


on the coil pack the one all the way to the left thats #4 then going from left to right #4-#1 #2 #3
4123 on the coil pack
then on the engine the spark plug closet to the top engine mount is #1 then 234 from left to right 1234 on the engine

Oct 15, 2009 | 2001 Saturn SL

2 Answers

My car backfires and will not start.


Cmashaft or crank shaft position snesors. Find their location and clean them 1st then re-try.

Aug 04, 2009 | 1995 Chevrolet Monte Carlo

2 Answers

My 96 Saturn sc2 wont turn over or start.


Was there oil/coolant in cylinders when they were pulled?

Jun 22, 2009 | 1992 Saturn SL2

1 Answer

No spark on # 5 cylender 1989 cavalier z24


change the control modul. that control voltage to the coils. it sound like it not bleeding off fast enough the control modul is under the coils. befoe changing any part remove ground off battery. befor change any coils u could of swop to see if this is still not firing

Feb 22, 2009 | 1988 Chevrolet Cavalier Z24

1 Answer

Car wont start


these cars go through coil packs regularly as the packs overheat due to their position on the end of the engine. I have 3 lanos and have replaced all coil packs at around 90,000 k's.
Hope this helps.

Nov 12, 2008 | 2000 Daewoo Lanos

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