starting then dieing?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

low_84_inchaska · 04-22-2011, 06:42 PM

my motor was starting and running just fine...until i went to start it today and it starts and dies but if i feather the throttle it will blurp and pop...then die fuel pump sounds as it should

it has gas cause i just put some in it...the only thing that is different is i unhooked the factory gauges which i dont think would affect anything?

99 5.3....

usmcchevy · 04-22-2011, 11:50 PM

Do you have a way of checking fuel pressure?

BR3W CITY · 04-24-2011, 02:25 PM

check for vacuum leaks if it can't maintain idle, double check that the MAF is connected and reasonably clean. Both can choke a car out.

low_84_inchaska · 04-25-2011, 08:02 AM

i checked fuel rail pressure-good
scanned codes-good
cleaned the maf
cleaned injectors

still starts then dies.

where specifically should i look for on the vacuum leak?

low_84_inchaska · 04-25-2011, 11:38 AM

just realized my egr plug got blown out and was on the floor... could this be the culprit???

BR3W CITY · 04-25-2011, 12:42 PM

the plug on the intake manifold, or the blockoff on the exhaust mani?
If its the intake then yes, thats a huge vaccuum leak introducing un-measured air into the manifold. I'm surprised it wouldn't throw a code, but not impossible.

low_84_inchaska · 04-25-2011, 01:01 PM

plug on the intake manifold...the reason it didnt throw a code is that the egr is programmed out>??

BR3W CITY · 04-25-2011, 04:06 PM

Ya, I would assume its acting like a giant vac leak. Even if the egr was programmed out, I would think all the extra air might trip another parameter, but who knows. Plug that up, and see what she does.

85burb · 04-25-2011, 07:59 PM

Some times engine has to be running for a certin amount of time to set a code or the ecm has to be testing for it. I would bet that is the problem but how did it come out?

low_84_inchaska · 04-26-2011, 08:04 AM

it twas the plug!!! runs like a champ!!

85burb · 04-26-2011, 08:26 PM

Yay!!!!

low_84_inchaska · 04-27-2011, 01:40 PM

yeah i feel like an idiot.

04-22-2011, 06:42 PM	#1
low_84_inchaska Registered User Join Date: Oct 2009 Location: Chaska, Minnesota Posts: 137	starting then dieing?? my motor was starting and running just fine...until i went to start it today and it starts and dies but if i feather the throttle it will blurp and pop...then die fuel pump sounds as it should it has gas cause i just put some in it...the only thing that is different is i unhooked the factory gauges which i dont think would affect anything? 99 5.3.... __________________ my build http://67-72chevytrucks.com/vboard/s...d.php?t=367330 84 short-wide 2wd. 99 5.3 vortec, built 4l60E, schoenfelds, bubb tune, cyber grey metallic 10 camaro ss/rs, 6spd manual, leather, loaded, cyber grey metallic

04-22-2011, 11:50 PM	#2
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: starting then dieing?? Do you have a way of checking fuel pressure? __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index

04-24-2011, 02:25 PM	#3
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: starting then dieing?? check for vacuum leaks if it can't maintain idle, double check that the MAF is connected and reasonably clean. Both can choke a car out. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

04-25-2011, 08:02 AM	#4
low_84_inchaska Registered User Join Date: Oct 2009 Location: Chaska, Minnesota Posts: 137	Re: starting then dieing?? i checked fuel rail pressure-good scanned codes-good cleaned the maf cleaned injectors still starts then dies. where specifically should i look for on the vacuum leak? __________________ my build http://67-72chevytrucks.com/vboard/s...d.php?t=367330 84 short-wide 2wd. 99 5.3 vortec, built 4l60E, schoenfelds, bubb tune, cyber grey metallic 10 camaro ss/rs, 6spd manual, leather, loaded, cyber grey metallic Last edited by low_84_inchaska; 04-25-2011 at 09:39 AM.

04-25-2011, 11:38 AM	#5
low_84_inchaska Registered User Join Date: Oct 2009 Location: Chaska, Minnesota Posts: 137	Re: starting then dieing?? just realized my egr plug got blown out and was on the floor... could this be the culprit??? __________________ my build http://67-72chevytrucks.com/vboard/s...d.php?t=367330 84 short-wide 2wd. 99 5.3 vortec, built 4l60E, schoenfelds, bubb tune, cyber grey metallic 10 camaro ss/rs, 6spd manual, leather, loaded, cyber grey metallic

04-25-2011, 12:42 PM	#6
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: starting then dieing?? the plug on the intake manifold, or the blockoff on the exhaust mani? If its the intake then yes, thats a huge vaccuum leak introducing un-measured air into the manifold. I'm surprised it wouldn't throw a code, but not impossible. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

04-25-2011, 01:01 PM	#7
low_84_inchaska Registered User Join Date: Oct 2009 Location: Chaska, Minnesota Posts: 137	Re: starting then dieing?? plug on the intake manifold...the reason it didnt throw a code is that the egr is programmed out>?? __________________ my build http://67-72chevytrucks.com/vboard/s...d.php?t=367330 84 short-wide 2wd. 99 5.3 vortec, built 4l60E, schoenfelds, bubb tune, cyber grey metallic 10 camaro ss/rs, 6spd manual, leather, loaded, cyber grey metallic

04-25-2011, 04:06 PM	#8
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: starting then dieing?? Ya, I would assume its acting like a giant vac leak. Even if the egr was programmed out, I would think all the extra air might trip another parameter, but who knows. Plug that up, and see what she does. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

04-25-2011, 07:59 PM	#9
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: starting then dieing?? Some times engine has to be running for a certin amount of time to set a code or the ecm has to be testing for it. I would bet that is the problem but how did it come out? __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

04-26-2011, 08:04 AM	#10
low_84_inchaska Registered User Join Date: Oct 2009 Location: Chaska, Minnesota Posts: 137	Re: starting then dieing?? it twas the plug!!! runs like a champ!! __________________ my build http://67-72chevytrucks.com/vboard/s...d.php?t=367330 84 short-wide 2wd. 99 5.3 vortec, built 4l60E, schoenfelds, bubb tune, cyber grey metallic 10 camaro ss/rs, 6spd manual, leather, loaded, cyber grey metallic

04-26-2011, 08:26 PM	#11
85burb Registered User Join Date: Dec 2009 Location: lindale,tx Posts: 2,373	Re: starting then dieing?? Yay!!!! __________________ 82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle

04-27-2011, 01:40 PM	#12
low_84_inchaska Registered User Join Date: Oct 2009 Location: Chaska, Minnesota Posts: 137	Re: starting then dieing?? yeah i feel like an idiot. __________________ my build http://67-72chevytrucks.com/vboard/s...d.php?t=367330 84 short-wide 2wd. 99 5.3 vortec, built 4l60E, schoenfelds, bubb tune, cyber grey metallic 10 camaro ss/rs, 6spd manual, leather, loaded, cyber grey metallic



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