i have a check ingine light on and the codes read, p0170 fuel trim bank missfire, cylindermissfire

Asked by Mar 05, 2012 at 01:38 AM about the 1999 Mazda Millenia 4 Dr S Supercharged Sedan

Question type: Maintenance & Repair

i have a check engine light on and i got the codes and they read p0170 fuel trimbank 1 missfire, cylinder missfire, what does that mean how would i be able to fix the problem? and when i go to start my car it takes a minute for it to start i dont know if it has anything to do with the problem?

3 Answers

10

Sounds like a fuel delivery issue. Either injector problems or fuel pressure regulator problems. I'd call a mazda dealer and ask for a service tech and ask him his opinion.

1 out of 1 people think this is helpful.
805

No the code P0170 is a lean code it basicly is telling you that you have a vacume leak , you need to have what they call a smoke check done for the leak which iss the safest way to check for it , they actually pump smoke into the engine block and then the smoke will escape from were the leak is, other way is spray either brake clean or carb cleaner on and around intake manifold and vacume lines to find leak while car is running, note:( car will act funny or will run better when you hit the area that is leaking) NOTE( this is dangerouse though if you hit the spark plug wires or anything that can cause a ignite a fire be very carefull at this type of diagnostics.

1 out of 1 people think this is helpful.
Best Answer
140

this is a classic vacuum leak. most common is one of the many plastic "tees" and "Y" that connects the more than 21 feet of vacuum line. to access most of them, you will have to pull the intake. there are 3 actual 'T' shaped, and the rest are 'Y' shaped. a place that sells tropical fish supplies is a good place to look for brass fittings. the hard start could be this leak affects the prc solenoid. another problem could be fuel pump, there is a valve in the pump that keeps fuel pressure in the system when it is shut off. if this valve bleeds down, then it takes several seconds for the fuel system to get adequate pressure. try this-when starting, turn the car on, but do not start. wait several seconds, then try to start. if it starts immediatly, then this valve is fubar. but to change it, you have to drop the fuel tank. not worth the trouble, imho

1 out of 1 people think this is helpful.

Your Answer

Add photo
Millenia

Looking for a Used Millenia in your area?

CarGurus has 94 nationwide Millenia listings and the tools to find you a great deal.

ZIP:

Search Mazda Millenia Questions

Mazda Millenia Experts

#1 Steven Cisneros
Steven Cisneros
Reputation 700
#2 Keith12345
Keith12345
Reputation 400
#3 Tom Demyan
Tom Demyan
Reputation 230
View All

Related Models For Sale

Used Honda Accord
811 Great Deals out of 81,609 listings starting at $899
Used Mazda MX-5 Miata
57 Great Deals out of 5,027 listings starting at $2,500
Used Nissan Maxima
347 Great Deals out of 25,221 listings starting at $1,400
Used Ford Mustang
364 Great Deals out of 44,400 listings starting at $1,000
Used Honda Civic
669 Great Deals out of 77,410 listings starting at $1,000
Used BMW 3 Series
1,387 Great Deals out of 37,824 listings starting at $1,500
Used Toyota Camry
1,103 Great Deals out of 96,275 listings starting at $1,250
Used Mitsubishi Eclipse Spyder
12 Great Deals out of 634 listings starting at $2,999
Used Nissan Altima
1,090 Great Deals out of 82,556 listings starting at $670
Used Mazda Protege
322 listings
Used Hyundai Sonata
608 Great Deals out of 51,091 listings starting at $1,300
Used Mazda 626
263 listings starting at $1,990
Used Honda Accord Coupe
173 Great Deals out of 10,691 listings starting at $2,200