yukon dies at idle

[Kool rider28]

ok. this morning i started her up and let her idle for about 5 mins and then she died. i could not get her to start w/o spraying ether in the throttle body. i got her started drove 30 miles to work. once i checked in at work i hoped in she started right up ran to oreily for a fuel filter changed it out. she started up. on my way home she died at about 1100 rpm. i tried to start her but nothing i sprayed more ether and she started but died at 1100 rpm. i sprayed more ether and started her up keep my foot on the pedal and drove 30 miles home never letting it get under 1500 rpms. got it home and let her idle. she cont to run so i turn the key off and she dies. i turn the key she starts like no problem. i play around by reving the engine up to 4-5k rpm she idles for about a 1 min i turn the key off. i start her back up and she starts and dies once she get to 1100 rpm. i try to start her nothing so i take turns unpluging tps, mas egr, ics, and map and nothing works. so i wait a couple of mins scratching my head and said what heck ill try again and she starts and now i cant get her to stall again. i never got a code or SES light. its a 93 model. with 133k miles. need help asap.. need it road worthy by saturday. im going 120 miles to pick up a new atv!!
thx in advance!!

 

[Gzes]

my 92 s10 does this... i would say that yea it should be feul filter but if you really need it fast hurry n see if it is it if not take it in to the mechanic and get it fixed so it works.

 

[Kool rider28]

already replaced the fuel filter. just started it again and she is running like a champ????!!! smh!

---------- Post added at 10:00 PM ---------- Previous post was at 08:20 PM ----------

where do i installed the fuel pressure ttester? im going to pick one up tomorrow after work? its a 93 tbi!

 

[Gzes]

I have no clue sunlit will no tho. By the way mine is a tbi n its a 94

 

[Kool rider28]

ok thx. i will pm him. i really dont want to take it to a shop. im an aircraft engine mechanic so i can figure it out with a little advice from the ppl that know more about these engines. i i really have been blessed to not have to work on this truck. she has been very good to me. but over time things will go bad. and plus really like learning new things.

 

[Gzes]

Mines been a *****... New motor new trans new drivetrain.... A lot of parts put in

 

[Kool rider28]

the bad luck. i hope it wouldnt get that bad for me atleast not close together! lol!

 

[Ceejkay]

i would deff start with a fuel pressure test, it almost sound like you have an intermittent fuel pump.. make sure you do the test a couple of times.

 

[SunlitComet]

Ceej, he does not have a shrader valve.

Kool, PM you email address to me please.

 

[Kool rider28]

pm sent!
thx!

 

[Kool rider28]

ok check my fuel pressure. i also found there was a code IAC so i changed it. still the same problem. i do know when it doesnt start my injector are not spraying fuel in the tb. so im wondering what tells the injectors to spray on start-up. i spray ether and she run and i go on my way.
i really could use some help!!

 

[SunlitComet]

According to my data there is a cranking signal for enrichment of fuel applied to C9 circuit of ECM. However the diagrams show it only with a manual transmission installed maybe a typo). it is fed thru fuse #8 "crank". You can also check for injector flow by having ignition on and grounding the non-pink wire of each injector while monitoring the fuel pressure and spray pattern. There is a possibility that the injectors could be clogged to.

 

[Magnumac]

had this happen to a couple of vehicles, it was always a bad EGR valve on mine.

 

[Kool rider28]

According to my data there is a cranking signal for enrichment of fuel applied to C9 circuit of ECM. However the diagrams show it only with a manual transmission installed maybe a typo). it is fed thru fuse #8 "crank". You can also check for injector flow by having ignition on and grounding the non-pink wire of each injector while monitoring the fuel pressure and spray pattern. There is a possibility that the injectors could be clogged to.

is it possible that the module(icm) in my dizzy is bad? i read on a couple of forums that if you let your truck sit in the rain and cold weather(like i did) it will cause that module to rust

 

[SunlitComet]

It is possible bit not always because of weather. If the terminal "C-Distributor Reference Hi" output fails to work properly the ECM will loose it reference for crankshaft position and rpm. The terminal "B-Bypass" also determines based on rpm weather or not the ICM or ECM controls the timing advance.

 

[Kool rider28]

Fixed!!!!

ICM fixed it! i ran to o'reily's and got one. installed it and she fired right up! i will drive her around town tonight. i let her run for a while and killed it she started right up again.
thx for you guys support! your awesome!