Multiple cylinder misfire

how can you be sure its the cylinders? maybe your spark plugs are worn and need to be changed?

Stuck with these codes P0174 and P0171..need help - Hyundai Forums ...

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Feb 12, 2014 - 10 posts - ‎6 authors
I've been getting these codes for awhile now which are p0174 "ECM has detected ... 06 Sonata LX 3.3L V6 ... the fact that your FE has gone down could indicate something else as .... 2014 Santa Fe Sport 2.0T AWD w/ Tech Package ... Join Date: Jul 2007 ...More on PowerTorque Tools - Hex Bits Set - SAE ...Missing: examination

p0171 p0172 p0174 p0175 p2187 p2188 p2189 p2190 - Page 2 - Hyundai ...

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Dec 25, 2014 - 10 posts - ‎3 authors
today one of my colleague who have same car sonata 2007 but with 4 cylinder.for checking ... Drives hyundai accent 2005(sold) Drives Hyundai Sonata 2006 v6 3.3L ...Due to it throwing codes for both rich and lean and after finding a thread searching those.... More on UltraSteel - Magnetic Nut Driver Set.Missing: examination

santa fe won't start, what is most likely wrong? - CarGurus

check the injectors with a noid light you may find a bad one. if not check the compression.

Thats exactly what it sounds like.

P0301 - Cylinder 1 Misfire Detected.


Possible Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak at cylinder


Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

first code means random/multiple misfire cylinder (s) detected
second code means misfire detected number 1 cylinder, third code, miss=fire number 3 cylinder fourth code misfire number 4 cylinder
causes can be spark plugs, HT leads, ignition coils, injector, wiring fault, low compression/ engine mechanical fault

dear friend- can you be more specific with the conditions and fault codes.this sounds like your TPS sensor is instructing the ECU to cut the feul,therefore there must be another fault code.

They are directly below the coil packs (10mm bolts).

Could be misfire. You need to get a code reader to find out what the trouble codes are. You can then better know what to do next. Spark plugs could be the problem. They are easy to change on the four cylinder, and the V6 is a bit of a chore as the intake plenum needs to be unbolted to change the three rear plugs. Get the codes read! best of luck!

tried testing the igniter also i would look into the injector, that will cause a single cylinder misfire and probably is your problem?misfires are not noticeable at higher speeds, which im sure you know but i would go that route, could have a pinched injector or a stuck one. one easy way to test is swap 3rd injector with another and see if that one starts misfiring instead, another rought is to get a cheap auto stethoscope and put it to each injector to hear if its opening and closing, compare with others. good luck.