misfire on cylinder 3

Asked by Oct 19, 2016 at 08:12 AM about the 2006 Mazda MPV LX

Question type: Maintenance & Repair

Check engine light came on couple months ago
stated was time to change spark plugs and coil
packs. Was able to do front 3 with coil packs. But
they looked perfectly fine. Had to wait about 2
weeks later before I could get to the back 3 and
check engine light came on again and it also
started to sputter when driving. I had the code read
before I changed them. This time it was reading
misfire on cylinder 3. So we changed the back 3
and coil packs. But it is still sputtering and reading
misfire on 3. Also a little gas smell when I turn the
heater on. The one service man said he suggests
installing new fuel injectors. That should do the
trick he says. So I did the fuel injector for the
cylinder 3 that was misfiringredients and it seems
to still be sputtering. What am I missing.

4 Answers

40,745

What is the trouble code? It could be a bad manifold gasket causing a vacuum leak at number 3 or it could be other issues. How many miles on this Mazda?

Code is P0303 cylinder 3 misfire detected. Which I am having a hard time understanding. It was saying it before we changed that one (it happens it be one under the manifold) so it shouldn't be acting up now with new ones. That is when they suggested it was the fuel injector so we just changed that. Miles are 89,480

40,745

If it were mine I probably would have replaced the same parts you did or at least moved them around to see if the miss moved with the parts. Now I would get some carb cleaner spray and spray it around the intake manifold gasket to see if the engine changes idle speed. This might indicate a vacuum leak at the number 3 intake port causing the engine to miss-fire on the #3 cylinder due to a lean condition. If I had no results with the vacuum leak test I would run a compression test to see if #3 had a burned valve or perhaps a broken valve spring. It is possible the problem is electrical with an issue with the wiring to the number 3 injector or the coil also. Keep us posted as to what you find.

40,745

http://repairpal.com/misfire-and-check-engine-light-due-to-failed- ignition-coil-482

Your Answer

Add photo

Related Questions

MPV

Looking for a Used MPV in your area?

CarGurus has 436 nationwide MPV listings starting at $1,200.

ZIP:

Search Mazda MPV Questions

Mazda MPV Experts

#1 bobbyleveille
bobbyleveille
Reputation 980
#2 Gary John
Gary John
Reputation 490
#3 Michelle Ann
Michelle Ann
Reputation 310
View All

Related Models For Sale

Used Honda Odyssey
344 Great Deals out of 27,960 listings starting at $2,295
Used Toyota Sienna
290 Great Deals out of 28,843 listings starting at $900
Used Mazda MAZDA5
49 Great Deals out of 1,918 listings starting at $1,200
Used Nissan Quest
94 Great Deals out of 3,089 listings starting at $995
Used Dodge Grand Caravan
307 Great Deals out of 34,371 listings starting at $1,995
Used Kia Sedona
139 Great Deals out of 9,356 listings starting at $1,999
Used Chrysler Town & Country
443 Great Deals out of 20,513 listings starting at $1,695
Used Toyota Corolla
871 Great Deals out of 74,381 listings starting at $1,500
Used Mazda CX-9
132 Great Deals out of 9,101 listings starting at $4,395
Used Honda CR-V
813 Great Deals out of 59,357 listings starting at $1,200
Used Chevrolet Equinox
1,260 Great Deals out of 65,891 listings starting at $1,600
Used Toyota Camry
1,101 Great Deals out of 96,247 listings starting at $1,250
Used Honda Pilot
461 Great Deals out of 19,638 listings starting at $599
Used Dodge Caravan
902 listings starting at $3,999
Used Toyota RAV4
640 Great Deals out of 61,978 listings starting at $2,450