RANDOM MISFIRE

2003 Nissan Maxima

Tiny

Bilgerat710

June, 17, 2013 AT 6:23 PM

At random my car will misfire and through a p300. I have sent all the injectors in to be checked. They checkout great. I replaced all the coils. All cats were replaced. I replaced the crank sensor. I also replaced the fuel pump and filter. I also put an 2004 rear valve cover on to fix th 2003 oil leak. When the car is running fine the output voltage is 14.1-14.0. When it is running rough it drops down to 13.7-13.6. The mass air flow sensor is also new. Running out of options.

FOUND 5709 RELATED QUESTIONS

Engine Miss

52 ANSWERS
12 IMAGES

3 Answers

Tiny

hmac300

June, 18, 2013 AT 5:57 AM

As this can be many things that cause this have a pro scan it so he can narrow things down.

Tiny

Bilgerat710

June, 23, 2013 AT 6:19 PM

I have scanned and reviewed all live data. Everything is within spec both when it is running rough or smooth.

Tiny

hmac300

June, 24, 2013 AT 6:50 AM

If you don't have a pro type scanner it won't pick up what needs to be. Your maf can be bad as well as low compression on cylinder, a lean injector etc. If you have an auto parts type scanner it can't read a lot of that stuff. Fuel pressure must be within spec as well and check all grommets for air leaks.

Please login or register to post a reply.

Code Read Retrieval/Clear Chevrolet Camaro
Code Read Retrieval/Clear - Dodge Stratus
 Step by Step video GMC Yukon XL 2000-2006
How to gather codes Ford Explorer
Code Read Retrieval/Clear Mercedes-Benz C230
Code Read Retrieval/Clear Mercedes Benz
How to read codes Chevrolet Blazer