my 95 F-150 has a problem where it likes to almost stall when in park or when i brake coming to a stop at all then when i push the gas in, it stops. I believe that it could be the mass air flow but its not the sensor because that is clean unless its just defective and i need a new one. I took off the mass air everything all the way back to the engine where the flaps open with the throttle to let air in. I took that block off and inside was a bunch of black sludge and stuff. Could that be making all the problems and making the truck run much worse? Should i just clean it out as best as i can and hook everything up? What other suggestions or advice does anyone have? I'm only 17 so i dont know a whole lot, just enough to get me by. thanks

 

Well Fordman, you may be young but you got at least 2 things working for you;You aren't afraid to ask questions and you're smart enough to drive the best truck out there. I'll bet every old fart on this board can identify with you-in that you're just starting out and willing to give it a try-Oh yeah-and no bucks to pay for alot of parts.

You don't say what engine/tranny you're working with, so we're shooting in the dark to help you. Clean out what you found, then find a can of wd-40 and start looking around for vacuum leaks. Especially the vacuum lines that control the air mixture lines (passenger side in the engine compartment-almost under the hood support and also behind the glove box (open the box and gently squeeze the plastic keepers on either side and it'll drop down)). The hoses get brittle and usually by squeezing them they'll fall apart in your hand. Replace with rubber lines from the parts store. If you have a V-8-check the vacuum lines running down the pass side also.

Also, take a look at the inside of your rotor cap and see if somebonehead used the cheap cap and rotor (the contacts are silvery instead of copper. These Fords don't like aftermarket ignition parts.

Last but not least, if you have access to a code reader-pull the codes and report back. If not, look up in the articles/specs tab under electrical (IIRC) and find the article on making your own jumper wire and how to use it.

Like the Home Depot ad says- You can do it, we can help.

 

it does't sound like the mass air problem. like"tomandbeth" put in some good things to check out.good luck and keep us posted on the updates.

 

I agree as well, this sounds like either a vaccum leak problem and or a problem with a Idle Air Control Valve which you should find attached to the throttle body. Your truck is at maximum vaccum at idle and when you are decelerating you are actually at what I would call maximum + (plus) vaccum, because it's even greater than when it's idling. This assumes you have an auto tranny or your clutch is still engaged.

 

i checked all the hoses and everything, theyre perfect. i cleaned out some of the sludge and stuff in there then ran the engine at about 2500 rpms as i sprayed some air intake cleaner into the throttle body as it said to. i put everything back together and put in a new air filter. Then i took all the spark plugs off and wiped em down and it stopped stalling like it was completely. i guess it just need cleaned up a bit. If it starts stalling again ill just do the same. Thanks for the help guys