93 gmc jimmy starting problem

mckason · 08-19-2008, 06:22 PM

I have a 93 jimmy with the 4.3 cfi. When cold it cranks for 10 seconds before starting and I have to give it fuel to start.It starts every time but the smoke really boils out when it does, and it idles kinda rough.Once it is warm it starts right up unless it has been sitting mabye 10 minutes.Driving down the road everything runs fine.Any suggestions on fixing this? It has always ran really good and started great till about a month ago this started and it is getting worse.Also I live in Oregon and we have manditory E10 gasoline now was this change maybe a factor? Have been using the new fuel for about six months.Help? Thanks!!!

**Midnight Tech** · 08-19-2008, 07:20 PM

Any "check engine" light? Sounds like perhaps something's gone wonky in the idle system.

mckason · 08-20-2008, 09:44 AM

No check engine light, thats what is crazy.I dont have a scanner so I have been trying to find out how to pull codes without one.I still wonder if this ethanol gas we use now has done something.

gatewaygod · 08-31-2008, 01:49 AM

jump a to b terminal in the obd1 connector easier way, go to autozone etc have them scan it, i would recomend that before jumping terminals being jumping the wrong terminals WILL result in frying your ECM

all gas has around 10% ethonal in it E10 is just another way to pull on that already stressed wallet

08-19-2008, 06:22 PM	#1 (permalink)
mckason Registered User Join Date: Aug 2008 Posts: 2 OS: xp	93 gmc jimmy starting problem I have a 93 jimmy with the 4.3 cfi. When cold it cranks for 10 seconds before starting and I have to give it fuel to start.It starts every time but the smoke really boils out when it does, and it idles kinda rough.Once it is warm it starts right up unless it has been sitting mabye 10 minutes.Driving down the road everything runs fine.Any suggestions on fixing this? It has always ran really good and started great till about a month ago this started and it is getting worse.Also I live in Oregon and we have manditory E10 gasoline now was this change maybe a factor? Have been using the new fuel for about six months.Help? Thanks!!!

08-19-2008, 07:20 PM	#2 (permalink)
Midnight Tech Admin/Head GreaseMonkey/Igor's alter ego/Grand Exalted PoohBah Join Date: Dec 2001 Location: SC Posts: 2,924 OS: Windows XP Home/Pro SP3/Windows 98SE/Fedora Core 6/RH 7.2 with Autopoint/TAMS II	Re: 93 gmc jimmy starting problem Any "check engine" light? Sounds like perhaps something's gone wonky in the idle system. __________________ Please post all questions in the appropriate forum. Questions sent by email or PM will not be answered. Sharing my life...with my Imzadi! Interested in Trek gaming? Check out the Dynaverse! Proud supporter of the Carolinas Aviation Museum. If we have helped you in any way, please donate to keep TSF up and running!

08-20-2008, 09:44 AM	#3 (permalink)
mckason Registered User Join Date: Aug 2008 Posts: 2 OS: xp	Re: 93 gmc jimmy starting problem No check engine light, thats what is crazy.I dont have a scanner so I have been trying to find out how to pull codes without one.I still wonder if this ethanol gas we use now has done something.

08-31-2008, 01:49 AM	#4 (permalink)
gatewaygod Registered User Join Date: Aug 2008 Location: ohio Posts: 7 OS: vista :(	Re: 93 gmc jimmy starting problem jump a to b terminal in the obd1 connector easier way, go to autozone etc have them scan it, i would recomend that before jumping terminals being jumping the wrong terminals WILL result in frying your ECM all gas has around 10% ethonal in it E10 is just another way to pull on that already stressed wallet