Maf = Bap

rasalibre · October 19th, 2009, 11:59 PM

okay so i found out i have a MAP sensor even though i have
MAF, can i cap it and it become a BAP? or do i need to change the sensor...? anyone?

R0B0T · October 20th, 2009, 12:15 AM

pull the vacuum line off the sensor, and cap the vacuum line. don't cap the sensor.

rasalibre · October 20th, 2009, 12:25 AM

thats it?

1fst5.0 · October 20th, 2009, 12:31 AM

yup

rasalibre · October 20th, 2009, 12:38 AM

would this cause me to idle like shit with it not capped?

Nice 5.0 · October 20th, 2009, 01:42 AM

Just curious but the computer doesn't need the readings from the map.

rasalibre · October 20th, 2009, 02:15 AM

is that a no? or are you asking?

uedlose · October 20th, 2009, 08:28 AM

if you don't cap the vac line to the engine then it is gone to idle ruff due to a vac leak he is saying to not cap off the sensor. and no not capping the sensor is not gone to cause idle issues.. and the EEC is getting a reading from the map still just not from the engine. it now is reading atmospheric pressure

badshoe · October 20th, 2009, 09:58 PM

Yes the map becomes a baro on mass air systems. The baro's nipple must be left open. If your having problems with the engine starting then stalling, there may be a low fuel pressure concern. Do you have a pressure gauge to test that? Do you have a code reader? Is the PCM the correct one for mass air? Where do you have the large gauge ground (normally black/green stripe) coming from the PCM's 40 and 60 pins? Since you have a trunked battery, that ground should go back to the battery neg. cable. Joe, you have both of my 5.0L swap dvd's and volume two has a long detailed chapter on "no start" troubleshooting which should help you out with this problem. Also if your PCM is for mass air, is the MAF sensor the right one for that PCM. If you think the MAF is bad, you could unplug it and start the engine. If it runs better, you may have a bad or wrong MAF sensor. Keep working at it Joe and update you findings.

rasalibre · October 21st, 2009, 02:56 AM

okay got it.

October 19th, 2009, 11:59 PM	#1
rasalibre Regular 1988 Mustang LX Coupe N/A Join Date: Nov 2008 Location: Salem, Oregon Posts: 216	Maf = Bap okay so i found out i have a MAP sensor even though i have MAF, can i cap it and it become a BAP? or do i need to change the sensor...? anyone? __________________ -Joe Alvarez

October 20th, 2009, 12:25 AM	#3
rasalibre Regular 1988 Mustang LX Coupe N/A Join Date: Nov 2008 Location: Salem, Oregon Posts: 216	thats it? __________________ -Joe Alvarez

October 20th, 2009, 12:38 AM	#5
rasalibre Regular 1988 Mustang LX Coupe N/A Join Date: Nov 2008 Location: Salem, Oregon Posts: 216	would this cause me to idle like shit with it not capped? __________________ -Joe Alvarez

October 20th, 2009, 02:15 AM	#7
rasalibre Regular 1988 Mustang LX Coupe N/A Join Date: Nov 2008 Location: Salem, Oregon Posts: 216	is that a no? or are you asking? __________________ -Joe Alvarez

October 20th, 2009, 08:28 AM	#8
uedlose Regular 89 Mustang Join Date: Oct 2008 Location: Middle Way WV Posts: 91	if you don't cap the vac line to the engine then it is gone to idle ruff due to a vac leak he is saying to not cap off the sensor. and no not capping the sensor is not gone to cause idle issues.. and the EEC is getting a reading from the map still just not from the engine. it now is reading atmospheric pressure __________________ just another ten sec. Mustang turbo baby just outside the nines... still only 306 CID Last edited by uedlose : October 20th, 2009 at 08:31 AM.

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October 20th, 2009, 12:15 AM	#2
R0B0T Regular 12.8@103... stock motor 11.8@113...150 shot Join Date: Apr 2008 Posts: 355	pull the vacuum line off the sensor, and cap the vacuum line. don't cap the sensor.

October 20th, 2009, 12:31 AM	#4
1fst5.0 Regular 1986 mustang gt Join Date: Apr 2009 Location: el paso tx Posts: 180	yup

October 20th, 2009, 01:42 AM	#6
Nice 5.0 Regular 1993 12.9 @ 105 Join Date: Jan 2007 Location: Raleigh NC Posts: 298	Just curious but the computer doesn't need the readings from the map.

October 20th, 2009, 09:58 PM	#9
badshoe Newbie Join Date: Dec 2007 Posts: 32	Yes the map becomes a baro on mass air systems. The baro's nipple must be left open. If your having problems with the engine starting then stalling, there may be a low fuel pressure concern. Do you have a pressure gauge to test that? Do you have a code reader? Is the PCM the correct one for mass air? Where do you have the large gauge ground (normally black/green stripe) coming from the PCM's 40 and 60 pins? Since you have a trunked battery, that ground should go back to the battery neg. cable. Joe, you have both of my 5.0L swap dvd's and volume two has a long detailed chapter on "no start" troubleshooting which should help you out with this problem. Also if your PCM is for mass air, is the MAF sensor the right one for that PCM. If you think the MAF is bad, you could unplug it and start the engine. If it runs better, you may have a bad or wrong MAF sensor. Keep working at it Joe and update you findings. __________________ BadShoe Productions, How-To-DVD's specializing in Ford drivetrains www.BadShoeProductions.com

October 21st, 2009, 02:56 AM	#10
rasalibre Regular 1988 Mustang LX Coupe N/A Join Date: Nov 2008 Location: Salem, Oregon Posts: 216	okay got it. __________________ -Joe Alvarez

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