How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15659
Experience:  GM Grand Master Technician 2007. 14 years experience.
Type Your Chevy Question Here...
GM Tech (Cam) is online now
A new question is answered every 9 seconds

chevy: his motor home near co Springs..that has quit running..vapor

Customer Question

my dad is in his motorhome near CO Springs. the year is a 2001 and has 8.0 chevy that has quit running and seems to be vapor locked. they are on the side of the road and could use some suggestions
Submitted: 8 years ago.
Category: Chevy
Expert:  Jan Andersson replied 8 years ago.



first off I'll admit I don't know this engine. So I'll offer my 2 cents worth of generic info and Opt out to keep the topic open for other experts who may know more.


To easily find out if it's a fuel delivery problem, spray something flammable like starter spray or brake cleaner (the flammabnle type, not the "safe" stuff) directly into the air intake through the air filter box. A 3 second spray should suffice. Then immediately turn the key and try to start the engine. If it tries to start and maybe runs for a second or two, you'll at least know you have spark, and can concentrate on the fuel system instead.


Vapor lock shouldn't happen on a running engine. The fuel flow cools everything enough. It's when you park a hot engine, that you may get vapor locking.. but it's not very likely in modern systems like these in my opinion.


Check fuel pump fuse. Listen for fuel pump running when you turn the key on or to start.

I can't remember if the pump is supposed to come on with teh ign ON, or only during cranking. It could also require oil pressure to build high enough first.

Customer: replied 8 years ago.
where is the fuel pump fuse my dad is 72 and having trouble locating it
Expert:  Jan Andersson replied 8 years ago.
unfortunately I don't know this vehicle and can't tell where the fuse panel is. There could be one in the cabin and another one in the engine bay.