91 will not stay on

marka08 · 06-28-2011, 11:08 AM

Hey guy,I am having some serious problems and I hope someone can help me out. First, my 1991 explorer sport will not stay on, it starts fine if it has not been started for awhile but then will die. Second if you do get it going and have to come to a stoplight or stop sign then it will cut off there, every time you stop. Third while driving, not always but it happens often, if I come out of second (its a manual) and go into third, or am in third, it will start stalling then shut completely off then when it hits the 2,000 RPM it comes back on by itself. I have absolutely no idea what is going on with it, I have been driving it for 5 years and nothing like this has ever occurred. Any advice would be great!!! Thanks

*Roadrunner777* · 06-28-2011, 12:21 PM

Check engine light on? Get it running and see if you hear any hissing anywhere under the hood, this sounds like it could be a vacuum leak.

The list of what could cause this is pretty long. If you have a check engine light, then read the codes (sticky in this forum or get a shop to do it). Bring the codes back here.

If you do not have a light, then another thing to look at is fuel pressure.

*mr cribb* · 06-28-2011, 06:49 PM

I was thinking dirty MAF or IAC for the start and instant die thing.... But I also agree with roadrunnner see if there is a vacuum leak.

06-28-2011, 11:08 AM	#1
marka08 Wannabe Elite Explorer Bristol Va 1991 explorer sport Join Date: Dec 2010 Posts: 14 Vehicle Specs (Original Poster)	91 will not stay on Hey guy,I am having some serious problems and I hope someone can help me out. First, my 1991 explorer sport will not stay on, it starts fine if it has not been started for awhile but then will die. Second if you do get it going and have to come to a stoplight or stop sign then it will cut off there, every time you stop. Third while driving, not always but it happens often, if I come out of second (its a manual) and go into third, or am in third, it will start stalling then shut completely off then when it hits the 2,000 RPM it comes back on by itself. I have absolutely no idea what is going on with it, I have been driving it for 5 years and nothing like this has ever occurred. Any advice would be great!!! Thanks

06-28-2011, 12:21 PM	#2
Roadrunner777 Bemidji, MN 94 4x4 Sport 88k Join Date: Feb 2011 Posts: 1,261 Vehicle Specs	Check engine light on? Get it running and see if you hear any hissing anywhere under the hood, this sounds like it could be a vacuum leak. The list of what could cause this is pretty long. If you have a check engine light, then read the codes (sticky in this forum or get a shop to do it). Bring the codes back here. If you do not have a light, then another thing to look at is fuel pressure. __________________ 1st Gen Fuel Pressure Not ready for prime time link list KD0SCJ

06-28-2011, 06:49 PM	#3
mr cribb Elite Explorer Eufaula, OK 92 4dr 5spd 2WD Join Date: Dec 2010 Posts: 1,350 Vehicle Specs	I was thinking dirty MAF or IAC for the start and instant die thing.... But I also agree with roadrunnner see if there is a vacuum leak. __________________ Jeremy Cribb, SGT, U.S. Army Retired 2002-2013. Iraq Veteran 2005-2006 Engine down for a while.... awaiting money for bottom end rebuild I collect license plates.... PM me if you have some up for grabs....