The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - '87 R10 suburban 350 V8 TBI stalls at lights

Smier · 06-13-2010, 10:28 PM

Yes, thoroughly go over all vacuum lines for leaks. Another common symptom on these TBI motors with a vacuum leak is an unusually high idle. Another good source for info on TBI setups is thirdgen.org, it's a site dedicated to 1982 to 1992 camaros, but they used the same TBI setups on our trucks and there are a lot of guys on there that know there stuff!!! A simple google search will give you info on how to diagnose the codes. Remember, just because you have a map code doesn't mean the map sensor is bad... It could be or something else might be causing it to act up. But it will point you in a direction. Be patient, keep posting up what you find and guys will try and help you out. Take your time and inspect connectors and clean up things as you go, I actually was fighting several problems on mine at the same time which made diagnosing difficult at times. I'd fix a problem, and it'd run better, but not 100%.

06-13-2010, 10:28 PM	#30
Smier Registered User Join Date: May 2010 Location: Easton, Pa Posts: 7	Re: '87 R10 suburban 350 V8 TBI stalls at lights - suggestions? Yes, thoroughly go over all vacuum lines for leaks. Another common symptom on these TBI motors with a vacuum leak is an unusually high idle. Another good source for info on TBI setups is thirdgen.org, it's a site dedicated to 1982 to 1992 camaros, but they used the same TBI setups on our trucks and there are a lot of guys on there that know there stuff!!! A simple google search will give you info on how to diagnose the codes. Remember, just because you have a map code doesn't mean the map sensor is bad... It could be or something else might be causing it to act up. But it will point you in a direction. Be patient, keep posting up what you find and guys will try and help you out. Take your time and inspect connectors and clean up things as you go, I actually was fighting several problems on mine at the same time which made diagnosing difficult at times. I'd fix a problem, and it'd run better, but not 100%.