Question about 2004 Nissan Titan

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Engine sputters on take off and than runs fine, checked mass flow ,cleaned injectors, checked for exhaust leak

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Check the throttle position sensor. Pull any error codes from the computer and respond to those indications...Check your fuel evaporative system, often set to purge at off idle and if raw fuel is being purged, rather than fumes, you can have yoru condition. There is a vapor separator that fails and the evaporative recovery system gets liquid fuel...

Posted on Nov 06, 2010

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Posted on Jan 02, 2017

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My 2003 Astro van has been running fine the I got gasmonday night and as I pulled out the gas station it spit and sputtered like I got bad gas or trash in filter, then it started working fine.


Mass air flow sensor maybe drity or going bad . Ever had it replaced ? Have you replaced the air filter lately ? Video's on youtube showing how to clean mass air flow sensor , you would have to buy a can of mass air flow sensor cleaner . Also while your at it clean the throttle plate , again there are videos on youtube . How did you check fuel pump ? To do it right you would need to hook up a pressure gauge . Also check flow .Videos on youtube .Has the check engine light come on ? Also you mite try some fuel injector cleaner and or dry gas for moisture in the fuel !

Mar 15, 2017 | Cars & Trucks

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96 olds lss had fuel pump replaced wont stay started long sputter spits ect.


You better find a different mechanic . Before calling a bad fuel pump ,did he do fuel pressure test ? Did he test the electrical circuit ? Did he check mass air flow sensor ,injectors , fuel regulator , engine senors ? How many miles on the vehicle , is the engine in good shape ? Timing chain ?

Aug 05, 2016 | Cars & Trucks

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I went to go check my gen 3 wh Holden statesman as I was having problems with it sounding like it was about to die out, the motor was running rough the mechanic scanned it and it showed it was the O2...


O2 sensors reads the amount of left over fuel in the exhaust and converts to a voltage signal so when voltage is around .800mv this is a rich condition and computer is commanding less fuel and .200mv is a lean condition computer is command more fuel. for rich condition problems check the following components. Fuel pressure regulator, leaking injectors, mass air flow meter, engine coolant temp sensor, map sensor.for a lean condition check engine vacuum leaks, exhaust leaks, air injection, map sensor, mass air flow sensor,fuel pressure regulator, fuel filter,injection

Apr 30, 2014 | Cars & Trucks

1 Answer

Low idle & vibration at idle


I don't know if this will help. Had a similar problem with a 99 Blazer.
Would drop to between 300 and 500 rpm at stop signs and red lights, would stall and shake.
Did all the same checks, replaced mass air flow sensor, replaced cam sensor, cleaned the fuel injectors but the problem was still there.
Replaced both #1 and #2 O2 sensors in the exhaust pipes and now the vehicle runs fine. The idle is back to a steady 750 rpm in all stopping conditions. The Mass air flow sensor and Cam position sensor get information from the O2 sensors.

Apr 10, 2014 | Ford Transit Connect Cars & Trucks

2 Answers

My 2000 toyota avalon has no power and feels like it is misfiring. when it finally does start going it takes forever to gain speed. i replaced the front 3 spark plugs and cleaned out the air filter. it...


Is there a check engine light on? Check for codes. If it's the mass air flow it will put out a code. Otherwise it is probably a clogged catalytic converter thats clogged. It will do the same thing. Turn your car on and check the pressure coming out of the back.

Oct 31, 2013 | Cars & Trucks

1 Answer

P 0171 (m)


PO171 refers to "system too lean - bank #1", This means that the upstream oxygen sensor detected too much oxygen in the exhaust. Cleaning out the MAF (mass air flow) housing and sensor will help eliminate the PO171 code. It's also necessary to clean the upper portion of the engine and fuel injectors, to make sure they are not clogged or "fouled." check for vacuum leaks and around intake manifold. spray around manifold with engine running, if it flares up you have a leak. in most cases. cleaning the MAF sensor does the trick !

May 03, 2012 | Jeep Grand Cherokee Cars & Trucks

2 Answers

What does error code p0172 and p0174?


P0172 - Fuel Injection System Too Rich Bank 1 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connec
Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem.



P0174 - Fuel Injection System Too Lean Bank 2 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection
Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem. Bottom line possible defective Mass airflow sensor and or O2 sensor in cylinder bank number two.

Feb 21, 2011 | 1998 Ford Expedition

2 Answers

I changed the plugs & cap, rotor, wires ,coil & fuel filter. the motor is still running rough.


If there's black smoke coming out of the tail pipe check M.A.P sensor for good vacum and coolant temp. sensor, both will work like a choke, if that check's out it 's going to be a bad fuel line leaking to the injector's or a fuel regulator, both sit under the in take, getting to much fuel will make it run like it need's a tune up.

May 17, 2010 | 1998 Chevrolet Blazer

3 Answers

99 volkswagen beetle 2.0 engine problem


Cat is usually damaged from vehicle misfiring, Those codes you posted are a MAF, idle control, and 02 sensor codes. The MAF sensor could be reading incorectly causing the car to run rich or lean, and giving the 02 sensors bad readings, i would deffinetly look into the MASS Air Flow sensor, which is located on the intake tuping near the airbox

You can also try cleaning it with MAF sensor cleaner

Apr 06, 2010 | 2000 Volkswagen Beetle

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