4.6 MAF testing
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From: Sullivan, MO
4.6 MAF testing
How do you test a MAF sensor off a 95 4.6l?? My Crown Vic won't idle and dies; unplug the MAF and it runs fine, a little rough at "loaded idle." Bought a new sensor and installed, still same problem. I would like to check both the new and old sensors to see if I got a bad new one or if there is a problem in the wiring?? Which terminals do I check and what should the reading be?? Thanks.
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Senior User
Joined: Jul 2010
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From: Sullivan, MO
More diagnostic info, but still the same problem....
Is there a way to test these sensors? Here are my scenarios:
Everything plugged in - starts and dies after 10 sec.
MAF unplugged - starts and stays running
MAF plugged in and PCV hose removed from valve - starts and stays running; will run for a while, but eventually dies, if valve hooked up after running for about 1 minute.
It acts like it's choking itself out, starving for air. Major vacuum leak causes it to stay running?? Am I getting too much fuel into the engine?? If so, where do I start with that one?? Fuel pressure regulator? Injectors??
This is really starting to get on my last nerve; it's my daily driver and I really need it running good. 60 miles a day dumping too much gas into the system is really going to start hurting the wallet! Thanks for the help.
Everything plugged in - starts and dies after 10 sec.
MAF unplugged - starts and stays running
MAF plugged in and PCV hose removed from valve - starts and stays running; will run for a while, but eventually dies, if valve hooked up after running for about 1 minute.
It acts like it's choking itself out, starving for air. Major vacuum leak causes it to stay running?? Am I getting too much fuel into the engine?? If so, where do I start with that one?? Fuel pressure regulator? Injectors??
This is really starting to get on my last nerve; it's my daily driver and I really need it running good. 60 miles a day dumping too much gas into the system is really going to start hurting the wallet! Thanks for the help.
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96_4wdr
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Mar 3, 2015 12:19 AM
