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Does low compression on a 3.1 litre 1999 cause a p0303 code?

Plug in #3 cyl. is new and the spark in very good to #3 cyl. compression is low more that 15 percent from other cylinders

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Could be a fuel injector, as long as you are getting around 150PSI in that hole I wouldn't think it would register a miss fire.

Posted on Dec 01, 2016

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Posted on Jan 02, 2017

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2008 Cadillac CTS returning P0303 after replacing spark plug and coil pack


Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
Engine control module (ECM).

Feb 27, 2014 | 2008 Cadillac Cts

1 Answer

How can i fix the missfire on a cylinder toyota corolla 2000 1.8ltr


First you need to retrieve codes from the Engine control module. You can buy a cheap code retriever at harbor freight and get the codes. After you get the codes, if it is P0301 it means cyl #1, P0302 = cyl #2, P0303=cyl 3 and P0304= cyl 4. For ex: if you got P0301 you should remove the ignition coil #1(near the front of the engine, where the pulley is) and change its position with the coil # 2. Also remove the spark plug #1 and change the position with the spark plug #4. Clear the codes and start and run the engine until the check engine light goes on. Check for codes and see if the code change for a different code. If it change the position observe which one is the change. If is P0304 you have a bad spark plug, If it is P0302 you have a bad coil. If it repeat P0301, you have either a low compression, bad injector/connector, bad intake gasket them you should continue your diagnostic. I hope this help you.
Junior.

Dec 17, 2012 | 2006 Toyota Corolla

1 Answer

Terraza P0303 Code. What's most likely cause? Injector, spark plug, wires or any of the above?


Might be dirty injector or burned valve. Check the connector on the injector. If good, run a compression test on all cylinders. If compression is significantly lower on #3, the head will have to come off. If compression is good, pull up the injector rail with injectors and wiring attached. Watch the injectors spray as someone cranks the engine.

Sep 02, 2017 | 2005 Buick Terraza

1 Answer

I have a code p0303 misfire cyl 3 , ford says bad injector. I bought a new one switched it. Still p0303 ,took it back to Ford they still said bad injector. I swaped from cyl 1 to cyl 3 . Still p0303 ,it...


Three sensors need checking/replacing
MAF sensor(mass airflow sensor)
ECM (engine control module)
ECT (engine coolant temp sensor)
Engine control module sounds good

Aug 08, 2011 | 2000 Ford Expedition

1 Answer

2005 Grand Cherokee 4.7L. When started multiple misfires cyl 1,3,5,7. After running about 1 minute, misfires disappear. Code p0300, sometime accompanied by p0303


P0300 is Multiple Misfire and P0303 is one specific misfire in the cyl #3.

A code P0303 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.

Hope helps.

Mar 07, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

P0303 and P1300 together (Cyl. 3 Misfire)


CODE P1300 IS MISFIRE DETECTED FUEL PROBLEM. WHICH MEAN 3 FUEL INJECTOR IS CLOGGED UP.HAVE FUEL INJECTORS CLEAN AND CHANGE FUEL FILTER.

Jul 24, 2010 | 1999 Audi A4

1 Answer

I have a p0303 trouble code on my 1999 Passat. Missfire on #3 cylinder. Coil is ok, I'm lost.


coil packs very prone to failing... check compression for good readings (at least 100 - 120psi) if okay try new spark plug as these can fail under load and its the cheapest part to replace to eliminate. if misfire still present swap cylinder 3 coil with cylinder 1 coil and see if fault code moves to cylinder 1. hope this advice helps

Jul 17, 2010 | 1999 Volkswagen Passat

1 Answer

I have a 1999 VW golf 2.0 gl code P0322, P0422, and P0303 code. I need help


  • 16706 P0322 Ign./distributor Eng. Speed Inp. Circ No signal
  • 16687 P0303 Cyl. 3 Misfire Detected
  • 16806 P0422 Main Catalyst, Bank 1 Below Threshold
P0322 Could be caused by a faulty Engine Speed Sensor also known as a Crankshaft Pos./Engine Speed Sensor.

P0303 Might have a faulty #3 Fuel Injector, Faulty spark plug and/or faulty spark plug wire and connectors.

P0422 Either your front 02 sensor is faulty and/or your catalytic converter is fried and needs replacing.

Mar 23, 2010 | 2000 Volkswagen Golf

3 Answers

1999 jeep cherokee 6 cylinder engine light


1.Plugs
2. Vacuum leak
3. Injector fault
4. High or low fuel pressure.
Thats the list of things to check.
This is a #3 cylinder misfire.
There is also TSB about #3 injector needing added heat protection. This could definitely be the cause. I start at plugs and go from there.
Hope this helps.
Thank you,
Lee

Dec 12, 2009 | 1999 Jeep Grand Cherokee

2 Answers

1998 saturn sc2 P0303 code just came up. already


p303 is a cylinder 3 missfire I woul first check the coil and then the ingnition module, Then if this dont work you could have a bad injector. If after testing and still no fix you should check the compression in that cyl.

Jul 09, 2009 | 1998 Saturn SL

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