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  #1  
Old 02-15-2016, 01:47 PM
reconrangerll reconrangerll is offline
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Default Engine almost stalls

I can't figure out why my engine feels as if it's going to stall whenever I stop. It never has yet. Just want to fix this issue. Any help would be greatly appreciated.
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Old 02-15-2016, 02:19 PM
richarddhoward richarddhoward is offline
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Default Re: Engine almost stalls

First step, clean your MAF, change the air filter. That is what caused it in my 97. Mind you I have the 4l V6, but the engine management is the same. Don't use brake clean, there is MAF cleaner at the parts store, get that and clean it good. Don't use anything that will leave stuff on the MAF such as paper towels, or damage it like a wire brush.
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Old 02-15-2016, 03:14 PM
reconrangerll reconrangerll is offline
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Default Re: Engine almost stalls

Is this the same as the iac valve?
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Old 02-15-2016, 04:32 PM
desertrunner33 desertrunner33 is offline
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Default

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Originally Posted by reconrangerll View Post
Is this the same as the iac valve?
No that's different. MAF will be somewhere on your intake hose and the IAC is usually on your throttle body.
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Old 02-16-2016, 05:43 AM
reconrangerll reconrangerll is offline
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Default Re: Engine almost stalls

OK thanks. I will try that this weekend.
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Old 02-16-2016, 06:42 AM
tomw0 tomw0 is offline
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Default Re: Engine almost stalls

I would check the IAC before suspecting the MAF. The MAF responds to air flow, and sends its signal to the computer. Unless it was totally dropping the signal, at idle the air flow would be minimal. It is not changing appreciably, so should be a more 'solid' signal level. Dirty MAF generally shows up when accelerating, as the flow through the MAF is changing as the rpm's increase. Dirt can prevent the MAF from 'knowing' the air flow has changed as it will insulate the hot wire from air flow effects(cooling), so it is not really involved in idle problems significantly.
A dirty IAC will not respond to command from the computer will. You might not have a cold fast-idle, or the engine may stall with A/C engagement or steering wheel turning if power steering is installed.
A MAP can also cause poor idle, but it will 'wander' all over the rpm range as the computer diddles with the fuel:air mix in response.
tom
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Old 03-01-2016, 02:13 PM
richarddhoward richarddhoward is offline
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Default Re: Engine almost stalls

Quote:
Originally Posted by tomw0 View Post
I would check the IAC before suspecting the MAF. The MAF responds to air flow, and sends its signal to the computer. Unless it was totally dropping the signal, at idle the air flow would be minimal. It is not changing appreciably, so should be a more 'solid' signal level. Dirty MAF generally shows up when accelerating, as the flow through the MAF is changing as the rpm's increase. Dirt can prevent the MAF from 'knowing' the air flow has changed as it will insulate the hot wire from air flow effects(cooling), so it is not really involved in idle problems significantly.
A dirty IAC will not respond to command from the computer will. You might not have a cold fast-idle, or the engine may stall with A/C engagement or steering wheel turning if power steering is installed.
A MAP can also cause poor idle, but it will 'wander' all over the rpm range as the computer diddles with the fuel:air mix in response.
tom
I would agree to that except I had it happen first hand, and had a few others with the same issue. As you roll up to a stop it would bounce RPM all over the place. It wasn't until two years later and a cleaning that I needed to change my IAC. But also a good spot to check.
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97 Ranger - 4.0 V6 auto, 4wd, 31x10.5x15s Wild Country XTX Sport All Terrains, Warn locking hubs, Pioneer deck with iPod attachment, Snugtop Topper, K&N filter, scan gauge II, Hella 500 Lights, More parts coming, waiting for the paycheck to get bigger!

Truck built in loving memory of Norm Howard
Outcast Racing
PNW Crew!!!
Afterhours Clan!!
Quote:
Originally Posted by aaron_ariens View Post
I think Henry just shit himself
Quote:
Originally Posted by Radness View Post
Its kind of like that carnival game "Whack A Mole" but with guns! Haha
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  #8  
Old 03-01-2016, 10:47 PM
rangergambler rangergambler is offline
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Default Re: Engine almost stalls

buy a new MOTORCRAFT IAC VALVE.
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