2000 Ford Ranger engine stalling

WHEELCHAIRDUDE49

MEMBER
2000 FORD RANGER
64,000 MILES

3 days ago I filled my gas tank. For the last 6 years ive only put in 20 dollars at a time. Truck ran fine for about 75 miles. Next day when I started it. It idled up and down and would stall. Took 15 min for it to spit and clear up and then it ran fine.
for another day now it stalls at stop sings and lights. Do you think I got some bad gasoline? Or do u think there's
debris in the fuel filter. A lot of soot at the talipipe. I, going to donate tomorrow when I get my ss check
Thank You

5 Replies

CARADIODOC

MECHANIC
33,723 POSTS

The black tail pipe is the clue that way too much gas is going into the engine. The best place to start is by checking for diagnostic fault codes. Those will indicate the circuit or system that needs further diagnosis. Many auto parts stores will read those codes for you for free.

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Friday, June 28th, 2013 AT 9:50 PM

WHEELCHAIRDUDE49

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73 POSTS

Code for that is P1121. Throttle sensor A inconsistent with MAF/MAP sensor. Maf sensor is 1 month old.
Should I change the tps on it? How do I donate today?

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Saturday, June 29th, 2013 AT 1:51 PM

CARADIODOC

MECHANIC
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I wouldn't be so quick to jump on the throttle position sensor. That will set a different code if the computer sees an unacceptable voltage from it. This code means based on its reading, (which is a valid reading), it is not seeing the expected amount of air coming through the mass air flow sensor. The most likely cause would be a leak in the fresh air tube between the mass air flow sensor and the throttle body. That will also cause stalling because the computer determines how much fuel enters the engine based in part on how much air is coming in. If any air sneaks in that isn't measured by the MAF sensor, the computer won't know about it and it won't make the right fuel metering calculations.

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Saturday, June 29th, 2013 AT 3:10 PM

WHEELCHAIRDUDE49

MEMBER
73 POSTS

The truck is out to my brothers. He check the air tube and everything was tight except for the air temp sensor,
it's loose. Would that cause the code? And should I buy a new one? Does it snap in there?
Thanks

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Saturday, June 29th, 2013 AT 8:09 PM

CARADIODOC

MECHANIC
33,723 POSTS

Sorry to leave you hanging. Been out for a week fighting a very painful kidney stone.

The best I can tell you with that intake air temperature sensor is there can't be any way for air to leak in after the mass air flow sensor. Do whatever you need to do to seal that up.